Commit Graph

37480 Commits

Author SHA1 Message Date
Jaswinder Singh Rajput af24a4e4ae KVM: Replace MSR_IA32_TIME_STAMP_COUNTER with MSR_IA32_TSC of msr-index.h
Use standard msr-index.h's MSR declaration.

MSR_IA32_TSC is better than MSR_IA32_TIME_STAMP_COUNTER as it also solves
80 column issue.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-09-10 08:32:38 +03:00
Gleb Natapov ae0bb3e011 KVM: VMX: Properly handle software interrupt re-injection in real mode
When reinjecting a software interrupt or exception, use the correct
instruction length provided by the hardware instead of a hardcoded 1.

Fixes problems running the suse 9.1 livecd boot loader.

Problem introduced by commit f0a3602c20 ("KVM: Move interrupt injection
logic to x86.c").

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-09-10 08:32:38 +03:00
Roderick Colenbrander 74a01180db powerpc: Fix i8259 interrupt driver kernel crash on ML510
This patch fixes a null pointer exception caused by removal of
'ack()' for level interrupts in the Xilinx interrupt driver.  A recent
change to the xilinx interrupt controller removed the ack hook for
level irqs.

Signed-off-by: Roderick Colenbrander <thunderbird2k@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-05 14:58:07 -07:00
Linus Torvalds 535e0c1726 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] fix csum_ipv6_magic()
  [IA64] Fix warning in dma-mapping.c
2009-09-05 14:50:53 -07:00
Linus Torvalds d3acd16cda Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Fix bootup with mcount in some configs.
  sparc64: Kill spurious NMI watchdog triggers by increasing limit to 30 seconds.
2009-09-05 13:49:06 -07:00
Linus Torvalds 93697a3cab Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf_counter/powerpc: Fix cache event codes for POWER7
  perf_counter: Fix /0 bug in swcounters
  perf_counters: Increase paranoia level
2009-09-05 13:48:37 -07:00
David S. Miller bd4352cadf sparc64: Fix bootup with mcount in some configs.
Functions invoked early when booting up a cpu can't use
tracing because mcount requires a valid 'current_thread_info()'
and TLB mappings to be setup.

The code path of sun4v_register_mondo_queues --> register_one_mondo
is one such case.  sun4v_register_mondo_queues already has the
necessary 'notrace' annotation, but register_one_mondo does not.

Normally register_one_mondo is inlined so the bug doesn't trigger,
but with some config/compiler combinations, it won't be so we
must properly mark it notrace.

While we're here, add 'notrace' annoations to prom_printf and
prom_halt so that early error handling won't have the same problem.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Reported-by: Leif Sawyer <lsawyer@gci.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-04 03:39:45 -07:00
David S. Miller e6617c6ec2 sparc64: Kill spurious NMI watchdog triggers by increasing limit to 30 seconds.
This is a compromise and a temporary workaround for bootup NMI
watchdog triggers some people see with qla2xxx devices present.

This happens when, for example:

CPU 0 is in the driver init and looping submitting mailbox commands to
load the firmware, then waiting for completion.

CPU 1 is receiving the device interrupts.  CPU 1 is where the NMI
watchdog triggers.

CPU 0 is submitting mailbox commands fast enough that by the time CPU
1 returns from the device interrupt handler, a new one is pending.
This sequence runs for more than 5 seconds.

The problematic case is CPU 1's timer interrupt running when the
barrage of device interrupts begin.  Then we have:

	timer interrupt
	return for softirq checking
	pending, thus enable interrupts

		 qla2xxx interrupt
		 return
		 qla2xxx interrupt
		 return
		 ... 5+ seconds pass
		 final qla2xxx interrupt for fw load
		 return

	run timer softirq
	return

At some point in the multi-second qla2xxx interrupt storm we trigger
the NMI watchdog on CPU 1 from the NMI interrupt handler.

The timer softirq, once we get back to running it, is smart enough to
run the timer work enough times to make up for the missed timer
interrupts.

However, the NMI watchdogs (both x86 and sparc) use the timer
interrupt count to notice the cpu is wedged.  But in the above
scenerio we'll receive only one such timer interrupt even if we last
all the way back to running the timer softirq.

The default watchdog trigger point is only 5 seconds, which is pretty
low (the softwatchdog triggers at 60 seconds).  So increase it to 30
seconds for now.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-03 02:35:20 -07:00
Paul Mackerras a3df6f7d30 perf_counter/powerpc: Fix cache event codes for POWER7
I had the codes for L1 D-cache load accesses and misses swapped
around, and the wrong codes for LL-cache accesses and misses.
This corrects them.

Reported-by: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@kernel.org>
LKML-Reference: <19103.8514.709300.585484@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-03 08:41:53 +02:00
Jiri Bohac 5afe18d2f5 [IA64] fix csum_ipv6_magic()
The 32-bit parameters (len and csum) of csum_ipv6_magic() are passed in 64-bit
registers in2 and in4. The high order 32 bits of the registers were never
cleared, and garbage was sometimes calculated into the checksum.

Fix this by clearing the high order 32 bits of these registers.

Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2009-09-02 09:14:48 -07:00
Luck, Tony f2486f2669 [IA64] Fix warning in dma-mapping.c
arch/ia64/kernel/dma-mapping.c:14: warning: control reaches end of non-void function
arch/ia64/kernel/dma-mapping.c:14: warning: no return statement in function returning non-void

This warning was introduced by commit: 390bd132b2
	Add dma_debug_init() for ia64

Signed-off-by: Tony Luck <tony.luck@intel.com>
2009-09-02 09:12:21 -07:00
Grant Grundler 825e1e2391 parisc: fix warning in traps.c
On Tue, Aug 18, 2009 at 01:45:17PM -0400, John David Anglin wrote:
>  CC      arch/parisc/kernel/traps.o
> arch/parisc/kernel/traps.c: In function 'handle_interruption':
> arch/parisc/kernel/traps.c:535:18: warning: operation on 'regs->iasq[0]'
> may be undefined

Yes - Line 535 should use both [0] and [1].

Reported-by: John David Anglin <dave@hiauly1.hia.nrc.ca>
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-28 19:37:20 -10:00
Linus Torvalds 4ed86af67e Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix vSMP boot crash
  x86, xen: Initialize cx to suppress warning
  x86, xen: Suppress WP test on Xen
2009-08-28 19:32:32 -10:00
Linus Torvalds e99b1f22f9 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/ps3: Update ps3_defconfig
  powerpc/ps3: Add missing check for PS3 to rtc-ps3 platform device registration
2009-08-26 20:39:31 -07:00
Geoff Levand b080f187ad powerpc/ps3: Update ps3_defconfig
Update ps3_defconfig.

 o Refresh for 2.6.31.
 o Remove MTD support.
 o Add more HID drivers.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-08-27 13:27:59 +10:00
Geert Uytterhoeven 7b6a09f3d6 powerpc/ps3: Add missing check for PS3 to rtc-ps3 platform device registration
On non-PS3, we get:

| kernel BUG at drivers/rtc/rtc-ps3.c:36!

because the rtc-ps3 platform device is registered unconditionally in a kernel
with builtin support for PS3.

Reported-by: Sachin Sant <sachinp@in.ibm.com>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-08-27 13:25:46 +10:00
Geert Uytterhoeven 9848484fad m68k,m68knommu: Wire up rt_tgsigqueueinfo and perf_counter_open
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-08-26 23:14:50 +02:00
Alexey Dobriyan 9fd926b4ab m68k: Fix redefinition of pgprot_noncached
arch/m68k/include/asm/pgtable_mm.h:148:1: warning: "pgprot_noncached" redefined
In file included from arch/m68k/include/asm/pgtable_mm.h:138,
                 from arch/m68k/include/asm/pgtable.h:4,
                 from include/linux/mm.h:40,
                 from include/linux/pagemap.h:7,
                 from include/linux/blkdev.h:12,
                 from arch/m68k/emu/nfblock.c:17:
include/asm-generic/pgtable.h:133:1: warning: this is the location of the previous definition

pgprot_noncached() should be defined _before_ including asm-generic/pgtable.h

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-08-26 23:14:49 +02:00
Andrew Morton dc71c7d5db arch/m68k/include/asm/motorola_pgalloc.h: fix kunmap arg
arch/m68k/include/asm/motorola_pgalloc.h: In function 'pte_alloc_one':
arch/m68k/include/asm/motorola_pgalloc.h:44: warning: passing argument 1 of 'kunmap' from incompatible pointer type

Also, remove unneeded test for kmap() failure.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-08-26 23:14:49 +02:00
Roel Kluin dd9b3e84f2 m68k: cnt reaches -1, not 0
With the postfix decrement cnt reaches -1 rather than 0.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-08-26 23:14:49 +02:00
Yinghai Lu 295594e9cf x86: Fix vSMP boot crash
2.6.31-rc7 does not boot on vSMP systems:

[    8.501108] CPU31: Thermal monitoring enabled (TM1)
[    8.501127] CPU 31 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[    8.650254] CPU31: Intel(R) Xeon(R) CPU           E5540  @ 2.53GHz stepping 04
[    8.710324] Brought up 32 CPUs
[    8.713916] Total of 32 processors activated (162314.96 BogoMIPS).
[    8.721489] ERROR: parent span is not a superset of domain->span
[    8.727686] ERROR: domain->groups does not contain CPU0
[    8.733091] ERROR: groups don't span domain->span
[    8.737975] ERROR: domain->cpu_power not set
[    8.742416]

Ravikiran Thirumalai bisected it to:

| commit 2759c3287d
| x86: don't call read_apic_id if !cpu_has_apic

The problem is that on vSMP systems the CPUID derived
initial-APICIDs are overlapping - so we need to fall
back on hard_smp_processor_id() which reads the local
APIC.

Both come from the hardware (influenced by firmware
though) so it's a tough call which one to trust.

Doing the quirk expresses the vSMP property properly
and also does not affect other systems, so we go for
this solution instead of a revert.

Reported-and-Tested-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shai Fultheim <shai@scalex86.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <4A944D3C.5030100@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-26 10:13:17 +02:00
Linus Torvalds 4dc627d55e Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Validate linear D-TLB misses.
  sparc64: Update defconfig.
  sparc32: Update defconfig.
  sparc32: Kill trap table freeing code.
  sparc: sys32.S incorrect compat-layer splice() system call
  sparc: Use page_fault_out_of_memory() for VM_FAULT_OOM.
  sparc64: Sign extend length arg to truncate syscalls when compat.
  sparc: Fix cleanup crash in bbc_envctrl_cleanup()
2009-08-25 21:24:26 -07:00
H. Peter Anvin 7adb4df410 x86, xen: Initialize cx to suppress warning
Initialize cx before calling xen_cpuid(), in order to suppress the
"may be used uninitialized in this function" warning.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
2009-08-25 21:10:32 -07:00
Jeremy Fitzhardinge d560bc6157 x86, xen: Suppress WP test on Xen
Xen always runs on CPUs which properly support WP enforcement in
privileged mode, so there's no need to test for it.

This also works around a crash reported by Arnd Hannemann, though I
think its just a band-aid for that case.

Reported-by: Arnd Hannemann <hannemann@nets.rwth-aachen.de>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-08-25 21:10:32 -07:00
David S. Miller d8ed1d43e1 sparc64: Validate linear D-TLB misses.
When page alloc debugging is not enabled, we essentially accept any
virtual address for linear kernel TLB misses.  But with kgdb, kernel
address probing, and other facilities we can try to access arbitrary
crap.

So, make sure the address we miss on will translate to physical memory
that actually exists.

In order to make this work we have to embed the valid address bitmap
into the kernel image.  And in order to make that less expensive we
make an adjustment, in that the max physical memory address is
decreased to "1 << 41", even on the chips that support a 42-bit
physical address space.  We can do this because bit 41 indicates
"I/O space" and thus covers non-memory ranges.

The result of this is that:

1) kpte_linear_bitmap shrinks from 2K to 1K in size

2) we need 64K more for the valid address bitmap

We can't let the valid address bitmap be dynamically allocated
once we start using it to validate TLB misses, otherwise we have
crazy issues to deal with wrt. recursive TLB misses and such.

If we're in a TLB miss it could be the deepest trap level that's legal
inside of the cpu.  So if we TLB miss referencing the bitmap, the cpu
will be out of trap levels and enter RED state.

To guard against out-of-range accesses to the bitmap, we have to check
to make sure no bits in the physical address above bit 40 are set.  We
could export and use last_valid_pfn for this check, but that's just an
unnecessary extra memory reference.

On the plus side of all this, since we load all of these translations
into the special 4MB mapping TSB, and we check the TSB first for TLB
misses, there should be absolutely no real cost for these new checks
in the TLB miss path.

Reported-by: heyongli@gmail.com
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-25 16:47:46 -07:00
Linus Torvalds 44afa9a4b8 Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  clockevent: Prevent dead lock on clockevents_lock
  timers: Drop write permission on /proc/timer_list
2009-08-25 11:24:04 -07:00
Linus Torvalds 9f459fadbb Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix build with older binutils and consolidate linker script
  x86: Fix an incorrect argument of reserve_bootmem()
  x86: add vmlinux.lds to targets in arch/x86/boot/compressed/Makefile
  xen: rearrange things to fix stackprotector
  x86: make sure load_percpu_segment has no stackprotector
  i386: Fix section mismatches for init code with !HOTPLUG_CPU
  x86, pat: Allow ISA memory range uncacheable mapping requests
2009-08-25 11:23:25 -07:00
Jan Beulich c62e43202e x86: Fix build with older binutils and consolidate linker script
binutils prior to 2.17 can't deal with the currently possible
situation of a new segment following the per-CPU segment, but
that new segment being empty - objcopy misplaces the .bss (and
perhaps also the .brk) sections outside of any segment.

However, the current ordering of sections really just appears
to be the effect of cumulative unrelated changes; re-ordering
things allows to easily guarantee that the segment following
the per-CPU one is non-empty, and at once eliminates the need
for the bogus data.init2 segment.

Once touching this code, also use the various data section
helper macros from include/asm-generic/vmlinux.lds.h.

-v2: fix !SMP builds.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: <sam@ravnborg.org>
LKML-Reference: <4A94085D02000078000119A5@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-25 15:54:16 +02:00
Linus Torvalds 7c0a57d5c4 Merge branch 'fixes' of git://git.marvell.com/orion
* 'fixes' of git://git.marvell.com/orion:
  [ARM] Orion NAND: Make asm volatile avoid GCC pushing ldrd out of the loop
  [ARM] Kirkwood: enable eSATA on QNAP TS-219P
  [ARM] Kirkwood: __init requires linux/init.h
2009-08-24 12:53:45 -07:00
Linus Torvalds e40c9056db Merge git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
  favr32: improve touchscreen response
  avr32/lib: fix unaligned memcpy where len < 4
  avr32/lib: fix unaligned memcpy()
2009-08-24 12:26:48 -07:00
Amerigo Wang a6a06f7b57 x86: Fix an incorrect argument of reserve_bootmem()
This line looks suspicious, because if this is true, then the
'flags' parameter of function reserve_bootmem_generic() will be
unused when !CONFIG_NUMA. I don't think this is what we want.

Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: akpm@linux-foundation.org
LKML-Reference: <20090821083709.5098.52505.sendpatchset@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-24 20:22:55 +02:00
John Holland c55bf102b6 [ARM] Kirkwood: enable eSATA on QNAP TS-219P
Initialize PCI/PCIe on the QNAP TS-119, TS-219 and TS-219P hardware
allowing the use of the discrete eSATA controller connected to the PCIe
bus in the TS-219P.

Signed-off-by: John Holland <john.holland@cellent-fs.de>
Tested-by: Thomas Reitmayr <treitmayr@devbase.at>
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2009-08-24 11:56:00 -04:00
Martin Michlmayr 3e475f579e [ARM] Kirkwood: __init requires linux/init.h
Include linux/init.h for __init to fix this error:

CC [M]  drivers/net/wireless/wl12xx/boot.o
In file included from arch/arm/mach-kirkwood/include/mach/gpio.h:13,
                 from arch/arm/include/asm/gpio.h:5,
                 from include/linux/gpio.h:7,
                 from drivers/net/wireless/wl12xx/boot.c:24:
arch/arm/plat-orion/include/plat/gpio.h:32: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘orion_gpio_init’
make[6]: *** [drivers/net/wireless/wl12xx/boot.o] Error 1
make[5]: *** [drivers/net/wireless/wl12xx] Error 2

Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2009-08-24 11:55:59 -04:00
Hendrik Brueckner 637952ca68 [S390] set preferred console based on conmode
setup_arch() unconditionally sets the preferred console to ttyS.
This breaks the use of 3270 devices as the console. Provide a new
function to set the default preferred console for s390. The preferred
console depends on the conmode parameter that is used to switch
between 3270 and 3215 terminal/console mode.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-08-23 18:10:01 +02:00
Linus Torvalds b04e6373d6 x86: don't call '->send_IPI_mask()' with an empty mask
As noted in 83d349f35e ("x86: don't send
an IPI to the empty set of CPU's"), some APIC's will be very unhappy
with an empty destination mask.  That commit added a WARN_ON() for that
case, and avoided the resulting problem, but didn't fix the underlying
reason for why those empty mask cases happened.

This fixes that, by checking the result of 'cpumask_andnot()' of the
current CPU actually has any other CPU's left in the set of CPU's to be
sent a TLB flush, and not calling down to the IPI code if the mask is
empty.

The reason this started happening at all is that we started passing just
the CPU mask pointers around in commit 4595f9620 ("x86: change
flush_tlb_others to take a const struct cpumask"), and when we did that,
the cpumask was no longer thread-local.

Before that commit, flush_tlb_mm() used to create it's own copy of
'mm->cpu_vm_mask' and pass that copy down to the low-level flush
routines after having tested that it was not empty.  But after changing
it to just pass down the CPU mask pointer, the lower level TLB flush
routines would now get a pointer to that 'mm->cpu_vm_mask', and that
could still change - and become empty - after the test due to other
CPU's having flushed their own TLB's.

See

	http://bugzilla.kernel.org/show_bug.cgi?id=13933

for details.

Tested-by: Thomas Björnell <thomas.bjornell@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-21 09:48:10 -07:00
Linus Torvalds 83d349f35e x86: don't send an IPI to the empty set of CPU's
The default_send_IPI_mask_logical() function uses the "flat" APIC mode
to send an IPI to a set of CPU's at once, but if that set happens to be
empty, some older local APIC's will apparently be rather unhappy.  So
just warn if a caller gives us an empty mask, and ignore it.

This fixes a regression in 2.6.30.x, due to commit 4595f9620 ("x86:
change flush_tlb_others to take a const struct cpumask"), documented
here:

	http://bugzilla.kernel.org/show_bug.cgi?id=13933

which causes a silent lock-up.  It only seems to happen on PPro, P2, P3
and Athlon XP cores.  Most developers sadly (or not so sadly, if you're
a developer..) have more modern CPU's.  Also, on x86-64 we don't use the
flat APIC mode, so it would never trigger there even if the APIC didn't
like sending an empty IPI mask.

Reported-by: Pavel Vilim <wylda@volny.cz>
Reported-and-tested-by: Thomas Björnell <thomas.bjornell@gmail.com>
Reported-and-tested-by: Martin Rogge <marogge@onlinehome.de>
Cc: Mike Travis <travis@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-21 09:23:57 -07:00
Jan Beulich fc0ce23506 x86: add vmlinux.lds to targets in arch/x86/boot/compressed/Makefile
The absence of vmlinux.lds here keeps .vmlinux.lds.cmd from being
included, which in turn leads to it and all its dependents always
getting rebuilt independent of whether they are already up-to-date.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4A8D84670200007800010D31@vpn.id2.novell.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-08-20 16:08:58 -07:00
Ingo Molnar cbcb340cb6 Merge branch 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen into x86/urgent 2009-08-20 12:05:24 +02:00
Jeremy Fitzhardinge ce2eef33d3 xen: rearrange things to fix stackprotector
Make sure the stack-protector segment registers are properly set up
before calling any functions which may have stack-protection compiled
into them.

[ Impact: prevent Xen early-boot crash when stack-protector is enabled ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-08-19 17:09:28 -07:00
Jeremy Fitzhardinge 5416c26635 x86: make sure load_percpu_segment has no stackprotector
load_percpu_segment() is used to set up the per-cpu segment registers,
which are also used for -fstack-protector.  Make sure that the
load_percpu_segment() function doesn't have stackprotector enabled.

[ Impact: allow percpu setup before calling stack-protected functions ]

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-08-19 17:09:21 -07:00
Linus Torvalds 4aa2d56b21 Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Update Microblaze defconfigs
  microblaze: Use klimit instead of _end for memory init
  microblaze: Enable ppoll syscall
  microblaze: Sane handling of missing timer/intc in device tree
  microblaze: use the generic ack_bad_irq implementation
2009-08-19 09:44:51 -07:00
Suresh Siddha f833bab87f clockevent: Prevent dead lock on clockevents_lock
Currently clockevents_notify() is called with interrupts enabled at
some places and interrupts disabled at some other places.

This results in a deadlock in this scenario.

cpu A holds clockevents_lock in clockevents_notify() with irqs enabled
cpu B waits for clockevents_lock in clockevents_notify() with irqs disabled
cpu C doing set_mtrr() which will try to rendezvous of all the cpus.

This will result in C and A come to the rendezvous point and waiting
for B. B is stuck forever waiting for the spinlock and thus not
reaching the rendezvous point.

Fix the clockevents code so that clockevents_lock is taken with
interrupts disabled and thus avoid the above deadlock.

Also call lapic_timer_propagate_broadcast() on the destination cpu so
that we avoid calling smp_call_function() in the clockevents notifier
chain.

This issue left us wondering if we need to change the MTRR rendezvous
logic to use stop machine logic (instead of smp_call_function) or add
a check in spinlock debug code to see if there are other spinlocks
which gets taken under both interrupts enabled/disabled conditions.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: "Pallipadi Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: "Brown Len" <len.brown@intel.com>
LKML-Reference: <1250544899.2709.210.camel@sbs-t61.sc.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-08-19 18:15:10 +02:00
David S. Miller 1ca3976d8c sparc64: Update defconfig.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 23:56:21 -07:00
David S. Miller 2193aa276e sparc32: Update defconfig.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 23:46:12 -07:00
David S. Miller a9919646d1 sparc32: Kill trap table freeing code.
Normally, srmmu uses different trap table register values to allow
determination of the cpu we're on.  All of the trap tables have
identical content, they just sit at different offsets from the first
trap table, and the offset shifted down and masked out determines
the cpu we are on.

The code tries to free them up when they aren't actually used
(don't have all 4 cpus, we're on sun4d, etc.) but that causes
problems.

For one thing it triggers false positives in the DMA debugging
code.  And fixing that up while preserving this relative offset
thing isn't trivial.

So just kill the freeing code, it costs us at most 3 pages, big
deal...

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 23:44:08 -07:00
Mathieu Desnoyers e2c6cbd9ac sparc: sys32.S incorrect compat-layer splice() system call
I think arch/sparc/kernel/sys32.S has an incorrect splice definition:

SIGN2(sys32_splice, sys_splice, %o0, %o1)

The splice() prototype looks like :

       long splice(int fd_in, loff_t *off_in, int fd_out,
                   loff_t *off_out, size_t len, unsigned int flags);

So I think we should have :

SIGN2(sys32_splice, sys_splice, %o0, %o2)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 20:16:55 -07:00
Linus Torvalds 77f312a96d Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu: use the right flag for get_vm_area()
  percpu, sparc64: fix sparse possible cpu map handling
  init: set nr_cpu_ids before setup_per_cpu_areas()
2009-08-18 19:41:05 -07:00
Linus Torvalds dc8ed71eeb Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, mce: Don't initialize MCEs on unknown CPUs
  x86, mce: don't log boot MCEs on Pentium M (model == 13) CPUs
  x86: Annotate section mismatch warnings in kernel/apic/x2apic_uv_x.c
  x86, mce: therm_throt: Don't log redundant normality
  x86: Fix UV BAU destination subnode id
2009-08-18 16:55:43 -07:00
Linus Torvalds b9d030a123 Merge branch 'sh/for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh/for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: sh7724 ddr self-refresh changes
  sh: use in-soc KEYSC on se7724
  sh: CMT suspend/resume
  sh: skip disabled LCDC channels
2009-08-18 13:54:26 -07:00
Jan Beulich 78b89ecd73 i386: Fix section mismatches for init code with !HOTPLUG_CPU
Commit 0e83815be7 changed the
section the initial_code variable gets allocated in, in an
attempt to address a section conflict warning. This, however
created a new section conflict when building without
HOTPLUG_CPU. The apparently only (reasonable) way to address
this is to always use __REFDATA.

Once at it, also fix a second section mismatch when not using
HOTPLUG_CPU.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Robert Richter <robert.richter@amd.com>
LKML-Reference: <4A8AE7CD020000780001054B@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-18 17:52:35 +02:00
Michal Simek 1fef789175 microblaze: Update Microblaze defconfigs
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-08-18 11:05:11 +02:00
Michal Simek 8f37b6c985 microblaze: Use klimit instead of _end for memory init
For noMMU system when you use larger rootfs image
there is problem with using _end label because
we increase klimit but in memory initialization
we use still _end which is wrong. Larger mtd rootfs
was rewritten by init_bootmem_node.

MMU kernel use static initialization where klimit
is setup to _end. There is no any other hanling
with klimit.

Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-08-18 10:34:12 +02:00
Michal Simek 2856ed35ea microblaze: Enable ppoll syscall
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-08-18 10:33:31 +02:00
John Williams 892ee92b81 microblaze: Sane handling of missing timer/intc in device tree
This code path doesn't test any returned pointers for NULL, leading to a bad
kernel page fault if there's no timer/intc found.

Slightly better is to BUG(), but even better still would be a printk beforehand.

Signed-off-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-08-18 10:33:30 +02:00
Christoph Hellwig 6b99ecec25 microblaze: use the generic ack_bad_irq implementation
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-08-18 10:33:29 +02:00
Suresh Siddha 1adcaafe74 x86, pat: Allow ISA memory range uncacheable mapping requests
Max Vozeler reported:
>  Bug 13877 -  bogl-term broken with CONFIG_X86_PAT=y, works with =n
>
>  strace of bogl-term:
>  814   mmap2(NULL, 65536, PROT_READ|PROT_WRITE, MAP_SHARED, 4, 0)
>				 = -1 EAGAIN (Resource temporarily unavailable)
>  814   write(2, "bogl: mmaping /dev/fb0: Resource temporarily unavailable\n",
>	       57) = 57

PAT code maps the ISA memory range as WB in the PAT attribute, so that
fixed range MTRR registers define the actual memory type (UC/WC/WT etc).

But the upper level is_new_memtype_allowed() API checks are failing,
as the request here is for UC and the return tracked type is WB (Tracked type is
WB as MTRR type for this legacy range potentially will be different for each
4k page).

Fix is_new_memtype_allowed() by always succeeding the ISA address range
checks, as the null PAT (WB) and def MTRR fixed range register settings
satisfy the memory type needs of the applications that map the ISA address
range.

Reported-and-Tested-by: Max Vozeler <xam@debian.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-08-17 14:12:44 -07:00
Linus Torvalds df4ecf1524 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: Fix HPAGE_SIZE redefinition
2009-08-17 13:39:52 -07:00
Linus Torvalds 0f66f96d21 Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: (37 commits)
  ARM: 5673/1: U300 fix initsection compile warning
  ARM: Fix broken highmem support
  mx31moboard: invert sdhc ro signal sense
  ARM: S3C24XX: Fix clkout mpx error
  ARM: S3C64XX: serial: Fix a typo in Kconfig
  IXP4xx: Fix IO_SPACE_LIMIT for 2.6.31-rc core PCI changes
  OMAP3: RX51: Updated rx51_defconfig
  OMAP2/3: mmc-twl4030: Free up MMC regulators while cleaning up
  OMAP3: RX51: Define TWL4030 USB transceiver in board file
  OMAP3: Overo: Fix smsc911x platform device resource value
  OMAP3: Fix omap3 sram virtual addres overlap vmalloc space after increasing vmalloc size
  OMAP2/3: DMA errata correction
  OMAP: Fix testing of cpu defines for mach-omap1
  OMAP3: Overo: add missing pen-down GPIO definition
  OMAP: GPIO: clear/restore level/edge detect settings on mask/unmask
  OMAP3: PM: Fix wrong sequence in suspend.
  OMAP: PM: CPUfreq: obey min/max settings of policy
  OMAP2/3/4: UART: allow in-order port traversal
  OMAP2/3/4: UART: Allow per-UART disabling wakeup for serial ports
  OMAP3: Fixed crash bug with serial + suspend
  ...
2009-08-17 13:36:39 -07:00
Atsushi Nemoto 87c62a66ed MIPS: Fix HPAGE_SIZE redefinition
This patch fixes warnings like this:
  CC      fs/proc/meminfo.o
In file included from /work/linux/include/linux/mmzone.h:20,
                 from /work/linux/include/linux/gfp.h:4,
                 from /work/linux/include/linux/mm.h:8,
                 from /work/linux/fs/proc/meminfo.c:5:
/work/linux/arch/mips/include/asm/page.h:36:1: warning: "HPAGE_SIZE" redefined
In file included from /work/linux/fs/proc/meminfo.c:2:
/work/linux/include/linux/hugetlb.h:107:1: warning: this is the location of the previous definition

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-08-17 17:27:57 +01:00
Ingo Molnar e412cd257e x86, mce: Don't initialize MCEs on unknown CPUs
An older test-box started hanging at the following point during
bootup:

 [    0.022996] Mount-cache hash table entries: 512
 [    0.024996] Initializing cgroup subsys debug
 [    0.025996] Initializing cgroup subsys cpuacct
 [    0.026995] Initializing cgroup subsys devices
 [    0.027995] Initializing cgroup subsys freezer
 [    0.028995] mce: CPU supports 5 MCE banks

I've bisected it down to commit 4efc0670 ("x86, mce: use 64bit
machine check code on 32bit"), which utilizes the MCE code on
32-bit systems too.

The problem is caused by this detail in my config:

  # CONFIG_CPU_SUP_INTEL is not set

This disables the quirks in mce_cpu_quirks() but still enables
MCE support - which then hangs due to the missing quirk
workaround needed on this CPU:

	if (c->x86 == 6 && c->x86_model < 0x1A && banks > 0)
		mce_banks[0].init = 0;

The safe solution is to not initialize MCEs if we dont know on
what CPU we are running (or if that CPU's support code got
disabled in the config).

Also be a bit more defensive on 32-bit systems: dont do a
boot-time dump of pending MCEs not just on the specific system
that we found a problem with (Pentium-M), but earlier ones as
well.

Now this problem is probably not common and disabling CPU
support is rare - but still being more defensive in something
we turned on for a wide range of CPUs is prudent.

Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
LKML-Reference: Message-ID: <4A88E3E4.40506@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-17 13:28:25 +02:00
Bartlomiej Zolnierkiewicz c7f6fa4411 x86, mce: don't log boot MCEs on Pentium M (model == 13) CPUs
On my legacy Pentium M laptop (Acer Extensa 2900) I get bogus MCE on a cold
boot with CONFIG_X86_NEW_MCE enabled, i.e. (after decoding it with mcelog):

MCE 0
HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 0 BANK 1 MCG status:
MCi status:
Error overflow
Uncorrected error
Error enabled
Processor context corrupt
MCA: Data CACHE Level-1 UNKNOWN Error
STATUS f200000000000195 MCGSTATUS 0

[ The other STATUS values observed: f2000000000001b5 (... UNKNOWN error)
  and f200000000000115 (... READ Error).

  To verify that this is not a CONFIG_X86_NEW_MCE bug I also modified
  the CONFIG_X86_OLD_MCE code (which doesn't log any MCEs) to dump
  content of STATUS MSR before it is cleared during initialization. ]

Since the bogus MCE results in a kernel taint (which in turn disables
lockdep support) don't log boot MCEs on Pentium M (model == 13) CPUs
by default ("mce=bootlog" boot parameter can be be used to get the old
behavior).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Reviewed-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-17 10:17:02 +02:00
Leonardo Potenza 52459ab913 x86: Annotate section mismatch warnings in kernel/apic/x2apic_uv_x.c
The function uv_acpi_madt_oem_check() has been marked __init,
the struct apic_x2apic_uv_x has been marked __refdata.

The aim is to address the following section mismatch messages:

WARNING: arch/x86/kernel/apic/built-in.o(.data+0x1368): Section mismatch in reference from the variable apic_x2apic_uv_x to the function .cpuinit.text:uv_wakeup_secondary()
The variable apic_x2apic_uv_x references
the function __cpuinit uv_wakeup_secondary()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: arch/x86/kernel/built-in.o(.data+0x68e8): Section mismatch in reference from the variable apic_x2apic_uv_x to the function .cpuinit.text:uv_wakeup_secondary()
The variable apic_x2apic_uv_x references
the function __cpuinit uv_wakeup_secondary()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: arch/x86/built-in.o(.text+0x7b36f): Section mismatch in reference from the function uv_acpi_madt_oem_check() to the function .init.text:early_ioremap()
The function uv_acpi_madt_oem_check() references
the function __init early_ioremap().
This is often because uv_acpi_madt_oem_check lacks a __init
annotation or the annotation of early_ioremap is wrong.

WARNING: arch/x86/built-in.o(.text+0x7b38d): Section mismatch in reference from the function uv_acpi_madt_oem_check() to the function .init.text:early_iounmap()
The function uv_acpi_madt_oem_check() references
the function __init early_iounmap().
This is often because uv_acpi_madt_oem_check lacks a __init
annotation or the annotation of early_iounmap is wrong.

WARNING: arch/x86/built-in.o(.data+0x8668): Section mismatch in reference from the variable apic_x2apic_uv_x to the function .cpuinit.text:uv_wakeup_secondary()
The variable apic_x2apic_uv_x references
the function __cpuinit uv_wakeup_secondary()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

Signed-off-by: Leonardo Potenza <lpotenza@inwind.it>
LKML-Reference: <200908161855.48302.lpotenza@inwind.it>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-16 19:44:13 +02:00
Hugh Dickins 4e5c25d405 x86, mce: therm_throt: Don't log redundant normality
0d01f31439 "x86, mce: therm_throt
- change when we print messages" removed redundant
announcements of "Temperature/speed normal".

They're not worth logging and remove their accompanying
"Machine check events logged" messages as well from the
console.

Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
LKML-Reference: <Pine.LNX.4.64.0908161544100.7929@sister.anvils>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-16 17:25:41 +02:00
Linus Walleij a2bb9f4d6a ARM: 5673/1: U300 fix initsection compile warning
The u300_init_check_chip() function was not properly tagged with
the __init macro and provided a initsection mismatch on
compilation.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-08-15 15:36:52 +01:00
Russell King 824df399a3 Merge branch 's3c-fixes' of git://aeryn.fluff.org.uk/bjdooks/linux 2009-08-15 12:43:13 +01:00
Russell King 8b61207895 Merge branch 'for-rmk-rc' of git://git.pengutronix.de/git/imx/linux-2.6 2009-08-15 12:42:46 +01:00
Russell King dde5828f56 ARM: Fix broken highmem support
Currently, highmem is selectable, and you can request an increased
vmalloc area.  However, none of this has any effect on the memory
layout since a patch in the highmem series was accidentally dropped.
Moreover, even if you did want highmem, all memory would still be
registered as lowmem, possibly resulting in overflow of the available
virtual mapping space.

The highmem boundary is determined by the highest allowed beginning
of the vmalloc area, which depends on its configurable minimum size
(see commit 60296c71f6 for details on
this).

We should create mappings and initialize bootmem only for low memory,
while the zone allocator must still be told about highmem.

Currently, memory nodes which are completely located in high memory
are not supported.  This is not a huge limitation since systems
relying on highmem support are unlikely to have discontiguous memory
with large holes.

[ A similar patch was meant to be merged before commit 5f0fbf9eca
  and be available  in Linux v2.6.30, however some git rebase screw-up
  of mine dropped the first commit of the series, and that goofage
  escaped testing somehow as well. -- Nico ]

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Nicolas Pitre <nico@marvell.com>
2009-08-15 12:36:00 +01:00
Cliff Wickman 3ef12c3c97 x86: Fix UV BAU destination subnode id
The SGI UV Broadcast Assist Unit is used to send TLB shootdown
messages to remote nodes of the system.  The header of the
message must contain the subnode id of the block in the
receiving hub that handles such messages.  It should always be
0x10, the id of the "LB" block.

It had previously been documented as a "must be zero" field.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Acked-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <E1Mc1x7-0005Ce-6t@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-15 11:58:02 +02:00
Magnus Damm 237674e050 sh: sh7724 ddr self-refresh changes
This patch updates the SuperH Mobile sleep assembly code with
support for DBSC memory controller found in the sh7724 processor.

Without this fix the memory hooked up to the sh7724 processor
will never enter self-refresh mode before suspending to ram. The
effect of this is that the memory contents most likeley will be
lost upon resume which may or may not be what you want.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 12:58:50 +09:00
Magnus Damm 9747e78b30 sh: use in-soc KEYSC on se7724
This patch updates the Solution Engine 7724 board code to use
in-SoC KEYSC resources for the keyboard platform device. Using
the in-SoC key scan controller fixes a crash-during-resume issue.

Without this patch the KEYSC hardware block located in the board
specific FPGA is used together with an external IRQ which is
routed through the FPGA and handled by some board specific demux
code. This board specific FPGA interrupt code does not implement
desc->set_wake() so the enable_irq_wake() call in the sh_keysc
driver will fail at suspend-to-ram time and the disable_irq_wake()
will bomb out when resuming.

Changing the platform data to use the in-SoC KEYSC hardware makes
the se7724 board support code less special which is a good thing.
Also, the board specific KEYSC pin setup code selects in-SoC pin
functions already which makes the current FPGA platform device data
look like a typo.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-15 12:58:47 +09:00
Valentin Longchamp 563abb4be1 mx31moboard: invert sdhc ro signal sense
Small confusion with our hardware engineer, the WP signal (RO) is
active low on our boards, the signal has to inverted.

This is a pretty straightforward patch, it could even go to -rc,
but if not, then push it for 2.6.32.

Signed-off-by: Valentin Longchamp <valentin.longchamp@epfl.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-08-14 12:33:23 +02:00
Tejun Heo 74d46d6b2d percpu, sparc64: fix sparse possible cpu map handling
percpu code has been assuming num_possible_cpus() == nr_cpu_ids which
is incorrect if cpu_possible_map contains holes.  This causes percpu
code to access beyond allocated memories and vmalloc areas.  On a
sparc64 machine with cpus 0 and 2 (u60), this triggers the following
warning or fails boot.

 WARNING: at /devel/tj/os/work/mm/vmalloc.c:106 vmap_page_range_noflush+0x1f0/0x240()
 Modules linked in:
 Call Trace:
  [00000000004b17d0] vmap_page_range_noflush+0x1f0/0x240
  [00000000004b1840] map_vm_area+0x20/0x60
  [00000000004b1950] __vmalloc_area_node+0xd0/0x160
  [0000000000593434] deflate_init+0x14/0xe0
  [0000000000583b94] __crypto_alloc_tfm+0xd4/0x1e0
  [00000000005844f0] crypto_alloc_base+0x50/0xa0
  [000000000058b898] alg_test_comp+0x18/0x80
  [000000000058dad4] alg_test+0x54/0x180
  [000000000058af00] cryptomgr_test+0x40/0x60
  [0000000000473098] kthread+0x58/0x80
  [000000000042b590] kernel_thread+0x30/0x60
  [0000000000472fd0] kthreadd+0xf0/0x160
 ---[ end trace 429b268a213317ba ]---

This patch fixes generic percpu functions and sparc64
setup_per_cpu_areas() so that they handle sparse cpu_possible_map
properly.

Please note that on x86, cpu_possible_map() doesn't contain holes and
thus num_possible_cpus() == nr_cpu_ids and this patch doesn't cause
any behavior difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Ingo Molnar <mingo@elte.hu>
2009-08-14 13:20:53 +09:00
Davide Rizzo 48ec45e725 ARM: S3C24XX: Fix clkout mpx error
Bug correction: CLK Outputs cannot have XTAL as parent

Signed-off-by: Davide Rizzo <elpa.rizzo@gmail.com>
[ben-linux@fluff.org: updated patch subject]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-08-14 00:45:49 +01:00
Linus Torvalds 3493e84de6 Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf_counter: Report the cloning task as parent on perf_counter_fork()
  perf_counter: Fix an ipi-deadlock
  perf: Rework/fix the whole read vs group stuff
  perf_counter: Fix swcounter context invariance
  perf report: Don't show unresolved DSOs and symbols when -S/-d is used
  perf tools: Add a general option to enable raw sample records
  perf tools: Add a per tracepoint counter attribute to get raw sample
  perf_counter: Provide hw_perf_counter_setup_online() APIs
  perf list: Fix large list output by using the pager
  perf_counter, x86: Fix/improve apic fallback
  perf record: Add missing -C option support for specifying profile cpu
  perf tools: Fix dso__new handle() to handle deleted DSOs
  perf tools: Fix fallback to cplus_demangle() when bfd_demangle() is not available
  perf report: Show the tid too in -D
  perf record: Fix .tid and .pid fill-in when synthesizing events
  perf_counter, x86: Fix generic cache events on P6-mobile CPUs
  perf_counter, x86: Fix lapic printk message
2009-08-13 12:24:33 -07:00
Linus Torvalds 1c2ffff407 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix oops in identify_cpu() on CPUs without CPUID
  x86: Clear incorrectly forced X86_FEATURE_LAHF_LM flag
  x86, mce: therm_throt - change when we print messages
  x86: Add reboot quirk for every 5 series MacBook/Pro
2009-08-13 12:08:44 -07:00
Russell King 3b3119fc54 Merge branch 'ixp4xx-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6 2009-08-13 09:55:38 +01:00
Magnus Damm dbefd606a3 sh: fix i2c init order on ap325rxa V2
Convert the AP325RXA board code to register devices at
arch_initcall() time instead of device_initcall(). This
fix unbreaks pcf8563 RTC driver support.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:43:43 +09:00
Magnus Damm ba3a170191 sh: fix i2c init order on Migo-R V2
Convert the Migo-R board code to register devices at
arch_initcall() time instead of __initcall(). This fix
unbreaks migor_ts touch screen driver support.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:39:02 +09:00
Magnus Damm ba9a633787 sh: convert processor device setup functions to arch_initcall()
Convert the processor platform device setup
functions from __initcall() and sometimes
device_initcall() to arch_initcall().

This makes sure that the platform devices are
registered a bit earlier so the devices are
available when drivers register using initcall
levels earlier than device_initcall().

A good example is platform devices needed by
i2c-sh_mobile.c which registers a bit earlier
using subsys_initcall().

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-13 11:36:33 +09:00
Ingo Molnar 04da8a43da perf_counter, x86: Fix/improve apic fallback
Johannes Stezenbach reported that his Pentium-M based
laptop does not have the local APIC enabled by default,
and hence perfcounters do not get initialized.

Add a fallback for this case: allow non-sampled counters
and return with an error on sampled counters. This allows
'perf stat' to work out of box - and allows 'perf top'
and 'perf record' to fall back on a hrtimer based sampling
method.

( Passing 'lapic' on the boot line will allow hardware
  sampling to occur - but if the APIC is disabled
  permanently by the hardware then this fallback still
  allows more systems to use perfcounters. )

Also decouple perfcounter support from X86_LOCAL_APIC.

-v2: fix typo breaking counters on all other systems ...

Reported-by: Johannes Stezenbach <js@sig21.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-12 14:12:49 +02:00
Ondrej Zary e8055139d9 x86: Fix oops in identify_cpu() on CPUs without CPUID
Kernel is broken for x86 CPUs without CPUID since 2.6.28. It
crashes with NULL pointer dereference in identify_cpu():

766        generic_identify(c);
767
768-->     if (this_cpu->c_identify)
769               this_cpu->c_identify(c);

this_cpu is NULL. This is because it's only initialized in
get_cpu_vendor() function, which is not called if the CPU has
no CPUID instruction.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
LKML-Reference: <200908112000.15993.linux@rainbow-software.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-12 11:49:41 +02:00
Roel Kluin e7369e01eb arch/ia64/kernel/iosapic: missing test after ioremap()
Missing test after ioremap()

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
2009-08-11 14:52:11 -07:00
Fenghua Yu 5359dffd43 ia64/topology.c: exit cache_add_dev when kobject_init_and_add fails
Make cache_add_dev exit sysfs when kobject_init_and_add returns an error.

Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
2009-08-11 14:52:11 -07:00
Fenghua Yu bf2a4c7270 arch/ia64/Makefile: Remove -mtune=merced in IA64 kernel build
Between GCC version 3.4.0 and 4.3.3 (including 3.4.0 and 4.3.3), -mtune=merced
is implemented in GCC. Starting from 4.4.0, -mtune=merced is deprecated.

Even implemented in versions between 3.4.0 and 4.3.3, the -mtune=merced
feature has been broken in some of the versions. For example, GCC 4.1.2 reports
interanl tuning function errors during kernel building with -mtune=merced. Or
GCC Bugzilla 16130 reports another -mtune=merced issue on GCC 3.4.1.

So I would remove the -mtune=merced from IA64 kernel build. Without this option,
kernel on Merced will remain the same except losing an unstable and out-of-date
performance tunning feature.

Since GCC version 3.4.0, -mtune=mckinley has been implemented. The
-mtune=mckinley option functions the same as mtune=itanium2. And mtune=itanium2
is the default option. So we don't need to add mtune=mckinley either since its
been the default option in any GCC version which implements this option.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
2009-08-11 14:52:11 -07:00
Jaswinder Singh Rajput b5a8879347 IA64: includecheck fix: ia64, pgtable.h
fix the following 'make includecheck' warning:

  arch/ia64/include/asm/pgtable.h: asm/processor.h is included more than once.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
2009-08-11 14:52:11 -07:00
Jaswinder Singh Rajput cfa5f809e3 IA64: includecheck fix: ia64, ia64_ksyms.c
fix the following 'make includecheck' warning:

  arch/ia64/kernel/ia64_ksyms.c: asm/page.h is included more than once.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
2009-08-11 14:52:10 -07:00
Johannes Weiner 8d6f9af919 ia64: boolean __test_and_clear_bit
__test_and_clear_bit() returns a bitfield with the tested-for bit set.
Make it consistent with the other bitops - of ia64 but also every
other architecture - and return a boolean value.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
2009-08-11 14:52:10 -07:00
Fenghua Yu 51b89f7a66 Bug Fix arch/ia64/kernel/pci-dma.c: fix recursive dma_supported() call in iommu_dma_supported()
In commit 160c1d8e40,
dma_ops->dma_supported = iommu_dma_supported;

This dma_ops->dma_supported is first called in platform_dma_init() during kernel
boot. Then dma_ops->dma_supported will be called recursively in
iommu_dma_supported.

Kernel can not boot because kernel can not get out of iommu_dma_supported until
it runs out of stack memory.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
2009-08-11 14:52:10 -07:00
Mikael Pettersson dee2b904a1 IXP4xx: Fix IO_SPACE_LIMIT for 2.6.31-rc core PCI changes
2.6.31-rc kernels don't boot on my ixp4xx box (ds101), because the libata
driver doesn't find the PCI IDE controller any more. 2.6.30 was fine.
I traced this to a PCI update (1f82de10d6)
in 2.6.30-git19. Diffing the kernel boot logs from 2.6.30-git18 and
2.6.30-git19 illustrates the breakage:

> --- dmesg-2.6.30-git18	2009-08-04 01:45:22.000000000 +0200
> +++ dmesg-2.6.30-git19	2009-08-04 01:45:46.000000000 +0200
> @@ -26,6 +26,13 @@
>  pci 0000:00:02.2: PME# supported from D0 D1 D2 D3hot
>  pci 0000:00:02.2: PME# disabled
>  PCI: bus0: Fast back to back transfers disabled
> +pci 0000:00:01.0: BAR 0: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 1: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 2: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 3: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 4: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:02.0: BAR 4: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:02.1: BAR 4: can't allocate I/O resource [0x10000-0xffff]
>  bio: create slab <bio-0> at 0
>  SCSI subsystem initialized
>  NET: Registered protocol family 2
> @@ -44,11 +51,7 @@
>  console [ttyS0] enabled
>  serial8250.0: ttyS1 at MMIO 0xc8001000 (irq = 13) is a XScale
>  Driver 'sd' needs updating - please use bus_type methods
> -PCI: enabling device 0000:00:01.0 (0140 -> 0141)
> -scsi0 : pata_artop
> -scsi1 : pata_artop
> -ata1: PATA max UDMA/100 cmd 0x1050 ctl 0x1060 bmdma 0x1040 irq 28
> -ata2: PATA max UDMA/100 cmd 0x1058 ctl 0x1064 bmdma 0x1048 irq 28
> +pata_artop 0000:00:01.0: no available native port
>  Using configured DiskOnChip probe address 0x50000000
>  DiskOnChip found at 0x50000000
>  NAND device: Manufacturer ID: 0x98, Chip ID: 0x73 (Toshiba NAND 16MiB 3,3V 8-bit)

The specific change in 1f82de10d6 responsible
for this failure turned out to be the following:

> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -193,7 +193,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
>  		res->flags |= pci_calc_resource_flags(l) | IORESOURCE_SIZEALIGN;
>  		if (type == pci_bar_io) {
>  			l &= PCI_BASE_ADDRESS_IO_MASK;
> -			mask = PCI_BASE_ADDRESS_IO_MASK & 0xffff;
> +			mask = PCI_BASE_ADDRESS_IO_MASK & IO_SPACE_LIMIT;
>  		} else {
>  			l &= PCI_BASE_ADDRESS_MEM_MASK;
>  			mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;

Every arch except arm's ixp4xx defines IO_SPACE_LIMIT as an all-bits-one
bitmask, typically -1UL but sometimes only a 16-bit 0x0000ffff. But ixp4xx
defines it as 0xffff0000, which is now causing the PCI failures.

Russell King noted that ixp4xx has 64KB PCI IO space, so IO_SPACE_LIMIT
should be 0x0000ffff. This patch makes that change, which fixes the PCI
failures on my ixp4xx box.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
2009-08-11 19:22:20 +02:00
Kevin Winchester fbd8b1819e x86: Clear incorrectly forced X86_FEATURE_LAHF_LM flag
Due to an erratum with certain AMD Athlon 64 processors, the
BIOS may need to force enable the LAHF_LM capability.
Unfortunately, in at least one case, the BIOS does this even
for processors that do not support the functionality.

Add a specific check that will clear the feature bit for
processors known not to support the LAHF/SAHF instructions.

Signed-off-by: Kevin Winchester <kjwinchester@gmail.com>
Acked-by: Borislav Petkov <petkovbb@googlemail.com>
LKML-Reference: <4A80A5AD.2000209@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-11 13:34:54 +02:00
Ingo Molnar f64ccccb8a perf_counter, x86: Fix generic cache events on P6-mobile CPUs
Johannes Stezenbach reported that 'perf stat' does not count
cache-miss and cache-references events on his Pentium-M based
laptop.

This is because we left them blank in p6_perfmon_event_map[],
fill them in.

Reported-by: Johannes Stezenbach <js@sig21.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-11 11:35:26 +02:00
Ingo Molnar 3c581a7f94 perf_counter, x86: Fix lapic printk message
Instead of this garbled bootup on UP Pentium-M systems:

[    0.015048] Performance Counters:
[    0.016004] no Local APIC, try rebooting with lapicno PMU driver, software counters only.

Print:

[    0.015050] Performance Counters:
[    0.016004] no APIC, boot with the "lapic" boot parameter to force-enable it.
[    0.017003] no PMU driver, software counters only.

Cf: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-11 10:58:25 +02:00
Dmitry Torokhov 0d01f31439 x86, mce: therm_throt - change when we print messages
My Latitude d630 seems to be handling thermal events in SMI by
lowering the max frequency of the CPU till it cools down but
still leaks the "everything is normal" events.

This spams the console and with high priority printks.

Adjust therm_throt driver to only print messages about the fact
that temperatire returned back to normal when leaving the
throttling state.

Also lower the severity of "back to normal" message from
KERN_CRIT to KERN_INFO.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <20090810051513.0558F526EC9@mailhub.coreip.homeip.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-11 09:54:17 +02:00
Shunichi Fuji 3e03bbeac5 x86: Add reboot quirk for every 5 series MacBook/Pro
Reboot does not work on my MacBook Pro 13 inch (MacBookPro5,5)
too. It seems all unibody MacBook and MacBookPro require
PCI reboot handling, i guess.

Following model/machine ID list shows unibody MacBook/Pro have
the 5 series of model number:

   http://www.everymac.com/systems/by_capability/macs-by-machine-model-machine-id.html

Signed-off-by: Shunichi Fuji <palglowr@gmail.com>
Cc: Ozan Çağlayan <ozan@pardus.org.tr>
LKML-Reference: <30046e3b0908101134p6487ddbftd8776e4ddef204be@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-10 20:59:42 +02:00
Linus Torvalds d00aa6695b Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits)
  perf_counter: Zero dead bytes from ftrace raw samples size alignment
  perf_counter: Subtract the buffer size field from the event record size
  perf_counter: Require CAP_SYS_ADMIN for raw tracepoint data
  perf_counter: Correct PERF_SAMPLE_RAW output
  perf tools: callchain: Fix bad rounding of minimum rate
  perf_counter tools: Fix libbfd detection for systems with libz dependency
  perf: "Longum est iter per praecepta, breve et efficax per exempla"
  perf_counter: Fix a race on perf_counter_ctx
  perf_counter: Fix tracepoint sampling to be part of generic sampling
  perf_counter: Work around gcc warning by initializing tracepoint record unconditionally
  perf tools: callchain: Fix sum of percentages to be 100% by displaying amount of ignored chains in fractal mode
  perf tools: callchain: Fix 'perf report' display to be callchain by default
  perf tools: callchain: Fix spurious 'perf report' warnings: ignore empty callchains
  perf record: Fix the -A UI for empty or non-existent perf.data
  perf util: Fix do_read() to fail on EOF instead of busy-looping
  perf list: Fix the output to not include tracepoints without an id
  perf_counter/powerpc: Fix oops on cpus without perf_counter hardware support
  perf stat: Fix tool option consistency: rename -S/--scale to -c/--scale
  perf report: Add debug help for the finding of symbol bugs - show the symtab origin (DSO, build-id, kernel, etc)
  perf report: Fix per task mult-counter stat reporting
  ...
2009-08-10 11:48:51 -07:00
Linus Torvalds a3263969b0 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix serialization in pit_expect_msb()
2009-08-10 11:11:40 -07:00
Linus Torvalds b6e61eef4f x86: Fix serialization in pit_expect_msb()
Wei Chong Tan reported a fast-PIT-calibration corner-case:

| pit_expect_msb() is vulnerable to SMI disturbance corner case
| in some platforms which causes /proc/cpuinfo to show wrong
| CPU MHz value when quick_pit_calibrate() jumps to success
| section.

I think that the real issue isn't even an SMI - but the fact
that in the very last iteration of the loop, there's no
serializing instruction _after_ the last 'rdtsc'. So even in
the absense of SMI's, we do have a situation where the cycle
counter was read without proper serialization.

The last check should be done outside the outer loop, since
_inside_ the outer loop, we'll be testing that the PIT has
the right MSB value has the right value in the next iteration.

So only the _last_ iteration is special, because that's the one
that will not check the PIT MSB value any more, and because the
final 'get_cycles()' isn't serialized.

In other words:

 - I'd like to move the PIT MSB check to after the last
   iteration, rather than in every iteration

 - I think we should comment on the fact that it's also a
   serializing instruction and so 'fences in' the TSC read.

Here's a suggested replacement.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: "Tan, Wei Chong" <wei.chong.tan@intel.com>
Tested-by: "Tan, Wei Chong" <wei.chong.tan@intel.com>
LKML-Reference: <B28277FD4E0F9247A3D55704C440A140D5D683F3@pgsmsx504.gar.corp.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-10 19:56:57 +02:00
Linus Torvalds 2c661a669b Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/dma: pci_set_dma_mask() shouldn't fail if mask fits in RAM
2009-08-10 08:59:56 -07:00
Jaswinder Singh Rajput 04e35357e2 MN10300: includecheck fix: mn10300, pci.h
Fix the following 'make includecheck' warning:

  arch/mn10300/include/asm/pci.h: linux/mm.h is included more than once.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-10 08:54:27 -07:00
Russell King 96a4d1e234 Merge branch 'pm-upstream/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm 2009-08-10 15:50:27 +01:00