In kexec jump support, jump back address passed to the kexeced
kernel via function calling ABI, that is, the function call
return address is the jump back entry.
Furthermore, jump back entry == 0 should be used to signal that
the jump back or preserve context is not enabled in the original
kernel.
But in the current implementation the stack position used for
function call return address is not cleared context
preservation is disabled. The patch fixes this bug.
Reported-and-tested-by: Yin Kangkai <kangkai.yin@intel.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/1310607277-25029-1-git-send-email-ying.huang@intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
We need to carve up the configuration between:
- MID general
- Moorestown specific
- Medfield specific
- Future devices
As a base point create an INTEL_MID configuration property. We
make the existing MRST configuration a sub-option. This means
that the rest of the kernel config can still use X86_MRST checks
without anything going backwards.
After this is merged future patches will tidy up which devices
are MID and which are X86_MRST, as well as add options for
Medfield.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/20110712164859.7642.84136.stgit@bob.linux.org.uk
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This code uses PCI_CLASS_REVISION instead of PCI_REVISION_ID, so
it wasn't converted by commit 44c10138fd ("PCI: Change all
drivers to use pci_device->revision") before being moved to arch/x86/...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Dave Jones <davej@redhat.com>
Link: http://lkml.kernel.org/r/201107111901.39281.sshtylyov@ru.mvista.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
The EFI specification requires that callers of the time related
runtime functions serialize with other CMOS accesses in the
kernel, as the EFI time functions may choose to also use the
legacy CMOS RTC.
Besides fixing a latent bug, this is a prerequisite to safely
enable the rtc-efi driver for x86, which ought to be preferred
over rtc-cmos on all EFI platforms.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: <mjg@redhat.com>
Link: http://lkml.kernel.org/r/4E257E33020000780004E319@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Matthew Garrett <mjg@redhat.com>
With CPU hotplug, there is a theoretical race between other CMOS
(namely RTC) accesses and those done in the SMP secondary
processor bringup path.
I am unware of the problem having been noticed by anyone in practice,
but it would very likely be rather spurious and very hard to reproduce.
So to be on the safe side, acquire rtc_lock around those accesses.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/4E257AE7020000780004E2FF@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
With the write lock path simply subtracting RW_LOCK_BIAS there
is, on large systems, the theoretical possibility of overflowing
the 32-bit value that was used so far (namely if 128 or more
CPUs manage to do the subtraction, but don't get to do the
inverse addition in the failure path quickly enough).
A first measure is to modify RW_LOCK_BIAS itself - with the new
value chosen, it is good for up to 2048 CPUs each allowed to
nest over 2048 times on the read path without causing an issue.
Quite possibly it would even be sufficient to adjust the bias a
little further, assuming that allowing for significantly less
nesting would suffice.
However, as the original value chosen allowed for even more
nesting levels, to support more than 2048 CPUs (possible
currently only for 64-bit kernels) the lock itself gets widened
to 64 bits.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/4E258E0D020000780004E3F0@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rather than having two functionally identical implementations
for 32- and 64-bit configurations, use the previously extended
assembly abstractions to fold the rwsem two implementations into
a shared one.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/4E258DF3020000780004E3ED@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rather than having two functionally identical implementations
for 32- and 64-bit configurations, extend the existing assembly
abstractions enough to fold the two rwlock implementations into
a shared one.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/4E258DD7020000780004E3EA@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Btrfs needs to be able to control how filemap_write_and_wait_range() is called
in fsync to make it less of a painful operation, so push down taking i_mutex and
the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some
file systems can drop taking the i_mutex altogether it seems, like ext3 and
ocfs2. For correctness sake I just pushed everything down in all cases to make
sure that we keep the current behavior the same for everybody, and then each
individual fs maintainer can make up their mind about what to do from there.
Thanks,
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86. reboot: Make Dell Latitude E6320 use reboot=pci
x86, doc only: Correct real-mode kernel header offset for init_size
x86: Disable AMD_NUMA for 32bit for now
1. support brownstone
2. support mmc
3. support basic filesystem and language
4. remove dynamic_debug, since too many log during access sd
Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Acked-by: Philip Rakity <prakity@marvell.com>
Acked-by: Mark F. Brown <mark.brown314@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
As suggested by Arnd, move platform data to include/linux/platform_data
in order to improve build coverage for the driver.
Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Update MMP2 platform code to "sdhci-pxav3", following the driver rename.
Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Acked-by: Philip Rakity <prakity@marvell.com>
Acked-by: Mark F. Brown <mark.brown314@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
sdhci-pltfm driver for PXAV3 SoCs, such as MMP2.
Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: Philip Rakity <prakity@marvell.com>
Acked-by: Philip Rakity <prakity@marvell.com>
Acked-by: Mark F. Brown <mark.brown314@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
The rcu callback sn_irq_info_free() just calls a kfree(),
so we use kfree_rcu() instead of the call_rcu(sn_irq_info_free).
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Jes Sorensen <jes@sgi.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Video input mux settings for tvp7002 and imager inputs were swapped.
Comment was correct.
Tested on EVM with tvp7002 input.
Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Acked-by: Manjunath Hadli <manjunath.hadli@ti.com>
Cc: stable@kernel.org
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Now that 1b3f2a72bb is in, it is very
important that the below lying comment be removed! :-)
Signed-off-by: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/20110718191054.GA18359@liondog.tnic
Acked-by: Andy Lutomirski <luto@mit.edu>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: SAMSUNG: DMA Cleanup as per sparse
ARM: SAMSUNG: Check NULL return from irq_alloc_generic_chip
This shift instruction appears to be shifting in the wrong direction.
Without this change, my SparcStation-20MP hangs just after bringing up
the second CPU:
Entering SMP Mode...
Starting CPU 2 at f02b4e90
Brought up 2 CPUs
Total of 2 processors activated (99.52 BogoMIPS).
*** stuck ***
Signed-off-by: Will Simoneau <simoneau@ele.uri.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Function declaration differs between file: dma.c and file:dma.h
and SPARSE (Documentation/sparse.txt) gives error messages
All dma channels are members of 'enum dma_ch' and not 'unsigned int'
Please have a look at channel definitions in:
arch/arm/mach-s3c64xx/include/mach/dma.h
arch/arm/plat-samsung/include/plat/s3c-dma-pl330.h
arch/arm/mach-s3c2410/include/mach/dma.h
So all arguments should be of type 'enum dma_ch'
Signed-off-by: Sangwook Lee <sangwook.lee@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Commit 234b6ceddb
clocksource: convert ARM 32-bit up counting clocksources
broke the build for ixp4xx and made big endian operation impossible.
This commit restores the original behaviour.
Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
[ Thomas says that we might want to have generic BE accessor functions
to the MMIO clock source, but that hasn't happened yet, so in the
meantime this seems to be the short-term fix for the particular
problem - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The code in arch/mips/kernel/i8259.c still hasn't been converted to
using struct syscore_ops instead of a sysdev for resume and shutdown.
As a result, this code doesn't build any more after suspend, resume
and shutdown callbacks have been removed from struct sysdev_class.
Fix this problem by converting i8259.c to using syscore_ops.
Reported-and-tested-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Fix the printk_once() so that it actually prints (didn't print before
due to a stray comma.)
[ hpa: changed to an incremental patch and adjusted the description
accordingly. ]
Signed-off-by: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1107151732480.18606@x980
Cc: <table@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* pm-runtime:
OMAP: PM: disable idle on suspend for GPIO and UART
OMAP: PM: omap_device: add API to disable idle on suspend
OMAP: PM: omap_device: add system PM methods for PM domain handling
OMAP: PM: omap_device: conditionally use PM domain runtime helpers
PM / Runtime: Add new helper function: pm_runtime_status_suspended()
PM / Runtime: Consistent utilization of deferred_resume
PM / Runtime: Prevent runtime_resume from racing with probe
PM / Runtime: Replace "run-time" with "runtime" in documentation
PM / Runtime: Improve documentation of enable, disable and barrier
PM: Limit race conditions between runtime PM and system sleep (v2)
PCI / PM: Detect early wakeup in pci_pm_prepare()
PM / Runtime: Return special error code if runtime PM is disabled
PM / Runtime: Update documentation of interactions with system sleep
* pm-domains: (33 commits)
ARM / shmobile: Return -EBUSY from A4LC power off if A3RV is active
PM / Domains: Take .power_off() error code into account
ARM / shmobile: Use genpd_queue_power_off_work()
ARM / shmobile: Use pm_genpd_poweroff_unused()
PM / Domains: Introduce function to power off all unused PM domains
PM / Domains: Queue up power off work only if it is not pending
PM / Domains: Improve handling of wakeup devices during system suspend
PM / Domains: Do not restore all devices on power off error
PM / Domains: Allow callbacks to execute all runtime PM helpers
PM / Domains: Do not execute device callbacks under locks
PM / Domains: Make failing pm_genpd_prepare() clean up properly
PM / Domains: Set device state to "active" during system resume
ARM: mach-shmobile: sh7372 A3RV requires A4LC
PM / Domains: Export pm_genpd_poweron() in header
ARM: mach-shmobile: sh7372 late pm domain off
ARM: mach-shmobile: Runtime PM late init callback
ARM: mach-shmobile: sh7372 D4 support
ARM: mach-shmobile: sh7372 A4MP support
ARM: mach-shmobile: sh7372: make sure that fsi is peripheral of spu2
ARM: mach-shmobile: sh7372 A3SG support
...
handle_signal()->set_fs() has a nice comment which explains what
set_fs() is, but it doesn't explain why it is needed and why it
depends on CONFIG_X86_64.
Afaics, the history of this confusion is:
1. I guess today nobody can explain why it was needed
in arch/i386/kernel/signal.c, perhaps it was always
wrong. This predates 2.4.0 kernel.
2. then it was copy-and-past'ed to the new x86_64 arch.
3. then it was removed from i386 (but not from x86_64)
by b93b6ca3 "i386: remove unnecessary code".
4. then it was reintroduced under CONFIG_X86_64 when x86
unified i386 and x86_64, because the patch above didn't
touch x86_64.
Remove it. ->addr_limit should be correct. Even if it was possible
that it is wrong, it is too late to fix it after setup_rt_frame().
Linus commented in:
http://lkml.kernel.org/r/alpine.LFD.0.999.0707170902570.19166@woody.linux-foundation.org
... about the equivalent bit from i386:
Heh. I think it's entirely historical.
Please realize that the whole reason that function is called "set_fs()" is
that it literally used to set the %fs segment register, not
"->addr_limit".
So I think the "set_fs(USER_DS)" is there _only_ to match the other
regs->xds = __USER_DS;
regs->xes = __USER_DS;
regs->xss = __USER_DS;
regs->xcs = __USER_CS;
things, and never mattered. And now it matters even less, and has been
copied to all other architectures where it is just totally insane.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/20110710164424.GA20261@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
1. do_signal() looks at TS_RESTORE_SIGMASK and calculates the
mask which should be stored in the signal frame, then it
passes "oldset" to the callees, down to setup_rt_frame().
This is ugly, setup_rt_frame() can do this itself and nobody
else needs this sigset_t. Move this code into setup_rt_frame.
2. do_signal() also clears TS_RESTORE_SIGMASK if handle_signal()
succeeds.
We can move this to setup_rt_frame() as well, this avoids the
unnecessary checks and makes the logic more clear.
3. use set_current_blocked() instead of sigprocmask(SIG_SETMASK),
sigprocmask() should be avoided.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/20110710182203.GA27979@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
sys_sigsuspend() and sys_sigreturn() change ->blocked directly.
This is not correct, see the changelog in e6fa16ab
"signal: sigprocmask() should do retarget_shared_pending()"
Change them to use set_current_blocked().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/20110710192727.GA31759@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
sys32_sigsuspend() and sys32_*sigreturn() change ->blocked directly.
This is not correct, see the changelog in e6fa16ab
"signal: sigprocmask() should do retarget_shared_pending()"
Change them to use set_current_blocked().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/20110710192724.GA31755@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Now that clocksource.archdata is available, use it for ia64-specific
code.
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: linux-ia64@vger.kernel.org
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/d31de0ee0842a0e322fb6441571c2b0adb323fa2.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Fix a trivial typo in the name of the constant
ENERGY_PERF_BIAS_POWERSAVE. This didn't cause trouble because this
constant is not currently used for anything.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/tip-abe48b108247e9b90b4c6739662a2e5c765ed114@git.kernel.org
Remove wrong setting of dev->flags. NETIF_F_NO_CSUM maps to IFF_DEBUG
there, so looks like a mistake.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Instead of hw_nmi_watchdog_set_attr() weak function
and appropriate x86_pmu::hw_watchdog_set_attr() call
we introduce even alias mechanism which allow us
to drop this routines completely and isolate quirks
of Netburst architecture inside P4 PMU code only.
The main idea remains the same though -- to allow
nmi-watchdog and perf top run simultaneously.
Note the aliasing mechanism applies to generic
PERF_COUNT_HW_CPU_CYCLES event only because arbitrary
event (say passed as RAW initially) might have some
additional bits set inside ESCR register changing
the behaviour of event and we can't guarantee anymore
that alias event will give the same result.
P.S. Thanks a huge to Don and Steven for for testing
and early review.
Acked-by: Don Zickus <dzickus@redhat.com>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
CC: Ingo Molnar <mingo@elte.hu>
CC: Peter Zijlstra <a.p.zijlstra@chello.nl>
CC: Stephane Eranian <eranian@google.com>
CC: Lin Ming <ming.m.lin@intel.com>
CC: Arnaldo Carvalho de Melo <acme@redhat.com>
CC: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20110708201712.GS23657@sun
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Software defined version number is not stable enough to be used
in device type naming scheme. The patch changes it to use implicit
soc name for spi device type definition. In this way, we can easily
align the naming scheme with device tree binding, which comes later.
It removes fifosize from spi_imx_data and adds devtype there, so that
fifosize can be set in an inline function according to devtype.
Also, cpu_is_mx can be replaced by inline functions checking devtype.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Since 2.6.36 (23016bf0d2), Linux prints the existence of "epb" in /proc/cpuinfo,
Since 2.6.38 (d5532ee7b4), the x86_energy_perf_policy(8) utility has
been available in-tree to update MSR_IA32_ENERGY_PERF_BIAS.
However, the typical BIOS fails to initialize the MSR, presumably
because this is handled by high-volume shrink-wrap operating systems...
Linux distros, on the other hand, do not yet invoke x86_energy_perf_policy(8).
As a result, WSM-EP, SNB, and later hardware from Intel will run in its
default hardware power-on state (performance), which assumes that users
care for performance at all costs and not for energy efficiency.
While that is fine for performance benchmarks, the hardware's intended default
operating point is "normal" mode...
Initialize the MSR to the "normal" by default during kernel boot.
x86_energy_perf_policy(8) is available to change the default after boot,
should the user have a different preference.
Signed-off-by: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1107140051020.18606@x980
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@kernel.org>
Since the A4LC should only be powered off if the A3RV is off, make
the A4LC's power down routine return -EBUSY if A3RV is not off to
indicate to the core that it doesn't want to power off the domain in
that case. This will cause the core to regard A4LC as active, so
the pm_genpd_poweron() in pd_power_down_a3rv() is not necessary any
more.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
Make pd_power_down_a3rv() use genpd_queue_power_off_work() to queue
up the powering off of the A4LC domain to avoid queuing it up when
it is pending.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
The vread field was bloating struct clocksource everywhere except
x86_64, and I want to change the way this works on x86_64, so let's
split it out into per-arch data.
Cc: x86@kernel.org
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: linux-ia64@vger.kernel.org
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/3ae5ec76a168eaaae63f08a2a1060b91aa0b7759.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Three fixes here:
- Send SIGSEGV if called from compat code or with a funny CS.
- Don't BUG on impossible addresses.
- Add a missing local_irq_disable.
This patch also removes an unused variable.
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/6fb2b13ab39b743d1e4f466eef13425854912f7f.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Make shmobile use pm_genpd_poweroff_unused() instead of the
open-coded powering off PM domains without devices in use.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
SPARSEMEM w/o VMEMMAP and DISCONTIGMEM, both used only on 32bit, use
sections array to map pfn to nid which is limited in granularity. If
NUMA nodes are laid out such that the mapping cannot be accurate, boot
will fail triggering BUG_ON() in mminit_verify_page_links().
On 32bit, it's 512MiB w/ PAE and SPARSEMEM. This seems to have been
granular enough until commit 2706a0bf7b (x86, NUMA: Enable
CONFIG_AMD_NUMA on 32bit too). Apparently, there is a machine which
aligns NUMA nodes to 128MiB and has only AMD NUMA but not SRAT. This
led to the following BUG_ON().
On node 0 totalpages: 2096615
DMA zone: 32 pages used for memmap
DMA zone: 0 pages reserved
DMA zone: 3927 pages, LIFO batch:0
Normal zone: 1740 pages used for memmap
Normal zone: 220978 pages, LIFO batch:31
HighMem zone: 16405 pages used for memmap
HighMem zone: 1853533 pages, LIFO batch:31
BUG: Int 6: CR2 (null)
EDI (null) ESI 00000002 EBP 00000002 ESP c1543ecc
EBX f2400000 EDX 00000006 ECX (null) EAX 00000001
err (null) EIP c16209aa CS 00000060 flg 00010002
Stack: f2400000 00220000 f7200800 c1620613 00220000 01000000 04400000 00238000
(null) f7200000 00000002 f7200b58 f7200800 c1620929 000375fe (null)
f7200b80 c16395f0 00200a02 f7200a80 (null) 000375fe 00000002 (null)
Pid: 0, comm: swapper Not tainted 2.6.39-rc5-00181-g2706a0b #17
Call Trace:
[<c136b1e5>] ? early_fault+0x2e/0x2e
[<c16209aa>] ? mminit_verify_page_links+0x12/0x42
[<c1620613>] ? memmap_init_zone+0xaf/0x10c
[<c1620929>] ? free_area_init_node+0x2b9/0x2e3
[<c1607e99>] ? free_area_init_nodes+0x3f2/0x451
[<c1601d80>] ? paging_init+0x112/0x118
[<c15f578d>] ? setup_arch+0x791/0x82f
[<c15f43d9>] ? start_kernel+0x6a/0x257
This patch implements node_map_pfn_alignment() which determines
maximum internode alignment and update numa_register_memblks() to
reject NUMA configuration if alignment exceeds the pfn -> nid mapping
granularity of the memory model as determined by PAGES_PER_SECTION.
This makes the problematic machine boot w/ flatmem by rejecting the
NUMA config and provides protection against crazy NUMA configurations.
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20110712074534.GB2872@htj.dyndns.org
LKML-Reference: <20110628174613.GP478@escobedo.osrc.amd.com>
Reported-and-Tested-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: Conny Seidel <conny.seidel@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
DISCONTIGMEM on x86-32 implements pfn -> nid mapping similarly to
SPARSEMEM; however, it calls each mapping unit ELEMENT instead of
SECTION. This patch renames it to SECTION so that PAGES_PER_SECTION
is valid for both DISCONTIGMEM and SPARSEMEM. This will be used by
the next patch to implement mapping granularity check.
This patch is trivial constant rename.
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20110712074422.GA2872@htj.dyndns.org
Cc: Hans Rosenfeld <hans.rosenfeld@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
When "apic=debug" is used as a boot parameter, Linux prints the IOAPIC routing
entries in "dmesg". Below is output from IOAPIC whose apic_id is 8:
# dmesg | grep "routing entry"
IOAPIC[8]: Set routing entry (8-1 -> 0x31 -> IRQ 1 Mode:0 Active:0 Dest:0)
IOAPIC[8]: Set routing entry (8-2 -> 0x30 -> IRQ 0 Mode:0 Active:0 Dest:0)
IOAPIC[8]: Set routing entry (8-3 -> 0x33 -> IRQ 3 Mode:0 Active:0 Dest:0)
...
Similarly, when IR (interrupt remapping) is enabled, and the IRTE
(interrupt remapping table entry) is set up we should display it.
After the fix:
# dmesg | grep IRTE
IOAPIC[8]: Set IRTE entry (P:1 FPD:0 Dst_Mode:0 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:0 Avail:0 Vector:31 Dest:00000000 SID:00F1 SQ:0 SVT:1)
IOAPIC[8]: Set IRTE entry (P:1 FPD:0 Dst_Mode:0 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:0 Avail:0 Vector:30 Dest:00000000 SID:00F1 SQ:0 SVT:1)
IOAPIC[8]: Set IRTE entry (P:1 FPD:0 Dst_Mode:0 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:0 Avail:0 Vector:33 Dest:00000000 SID:00F1 SQ:0 SVT:1)
...
The IRTE is defined in Sec 9.5 of the Intel VT-d Specification.
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Link: http://lkml.kernel.org/r/20110712211704.2939.71291.sendpatchset@nchumbalkar.americas.cpqcorp.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/mm: Fix memory_block_size_bytes() for non-pseries
mm: Move definition of MIN_MEMORY_BLOCK_SIZE to a header
Until these drivers are runtime PM converted, their device power
states are managed by calling custom driver hooks late in the
idle/suspend path. Therefore, do not let the suspend/resume core code
automatically idle these devices since they will be managed manually
by the OMAP PM core very late in the idle/suspend path.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
By default, omap_devices will be automatically idled on suspend
(and re-enabled on resume.) Using this new API, device init code
can disable this feature if desired.
NOTE: any driver/device that has been runtime PM converted should
not be using this API.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
In the omap_device PM domain callbacks, use omap_device idle/enable to
automatically manage device idle states during system suspend/resume.
If an omap_device has not already been runtime suspended, the
->suspend_noirq() method of the PM domain will use omap_device_idle()
to idle the HW after calling the driver's ->runtime_suspend()
callback. Similarily, upon resume, if the device was suspended during
->suspend_noirq(), the ->resume_noirq() method of the PM domain will
use omap_device_enable() to enable the HW and then call the driver's
->runtime_resume() callback.
If a device has already been runtime suspended, the noirq methods of
the PM domain leave the device runtime suspended by default.
However, if a driver needs to runtime resume a device during suspend
(for example, to change its wakeup settings), it may do so using
pm_runtime_get* in it's ->suspend() callback.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Only build and use the runtime PM helper functions only when runtime
PM is actually enabled.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Somehow we got into a situation where the __this_cpu_xchg() operations were
not defined in the same way as this_cpu_xchg() and friends. I had some build
failures under 32 bit that were addressed by these fixes.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Commit 7416401 ("arm: davinci: Fix fallout from generic irq chip
conversion") introduced a bug, causing low level interrupt handlers to
get a bogus irq number as an argument. The gpio irq handler falsely
assumes that the handler data is the irq base number and that is no
longer true.
Set the irq handler data to be a pointer to the corresponding gpio
controller. The chained irq handler can then use it to extract both the
irq base number and the gpio registers structure.
Signed-off-by: Ido Yariv <ido@wizery.com>
CC: Thomas Gleixner <tglx@linutronix.de>
[nsekhar@ti.com: renamed "ctl" to "d", simplified indexing logic for chips and
took care of odd bank handling in irq handler]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Just compiling pseries in the kernel causes it to override
memory_block_size_bytes() regardless of what is the runtime
platform.
This cleans up the implementation of that function, fixing
a bug or two while at it, so that it's harmless (and potentially
useful) for other platforms. Without this, bugs in that code
would trigger a WARN_ON() in drivers/base/memory.c when
booting some different platforms.
If/when we have another platform supporting memory hotplug we
might want to either move that out to a generic place or
make it a ppc_md. callback.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The macro MIN_MEMORY_BLOCK_SIZE is currently defined twice in two .c
files, and I need it in a third one to fix a powerpc bug, so let's
first move it into a header
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Removing __init from check_platform_magic since it is called by
xen_unplug_emulated_devices in non-init contexts (It probably gets inlined
because of -finline-functions-called-once, removing __init is more to avoid
mismatch being reported).
Signed-off-by: Raghavendra D Prabhu <rprabhu@wnohang.net>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
In the past we would only use the function's value if the
returned value was not equal to 'acpi_sci_override_gsi'. Meaning
that the INT_SRV_OVR values for global and source irq were different.
But it is OK to use the function's value even when the global
and source irq are the same.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
In the past (2.6.38) the 'xen_allocate_pirq_gsi' would allocate
an entry in a Linux IRQ -> {XEN_IRQ, type, event, ..} array. All
of that has been removed in 2.6.39 and the Xen IRQ subsystem uses
an linked list that is populated when the call to
'xen_allocate_irq_gsi' (universally done from any of the xen_bind_*
calls) is done. The 'xen_allocate_pirq_gsi' is a NOP and there is
no need for it anymore so lets remove it.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
As the code paths that are guarded by CONFIG_XEN_DOM0 already depend
on CONFIG_ACPI so the extra #ifdef is not required. The earlier
patch that added them in had done its job.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
.. which means we can preset of NR_IRQS_LEGACY interrupts using
the 'acpi_get_override_irq' API before this loop.
This means that we can get the IRQ's polarity (and trigger) from either
the ACPI (or MP); or use the default values. This fixes a bug if we did
not have an IOAPIC we would not been able to preset the IRQ's polarity
if the MP table existed.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Since they are only called once and the rest of the pci_xen_*
functions follow the same pattern of setup.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
In the past we would guard those code segments to be dependent
on CONFIG_XEN_DOM0 (which depends on CONFIG_ACPI) so this patch is
not stricly necessary. But the next patch will merge common
HVM and initial domain code and we want to make sure the CONFIG_ACPI
dependency is preserved - as HVM code does not depend on CONFIG_XEN_DOM0.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Update the out-dated comment at the beginning of the file.
Also provide the copyrights of folks who have been contributing
to this code lately.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The file is hard to read. Move the code around so that
the contents of it follows a uniform format:
- setup GSIs - PV, HVM, and initial domain case
- then MSI/MSI-x setup - PV, HVM and then initial domain case.
- then MSI/MSI-x teardown - same order.
- lastly, the __init functions in PV, HVM, and initial domain order.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The code in setup_ioapic_irq() determines the Destination Field,
so why not also include it in the debug printk output that gets
displayed when the boot parameter "apic=debug" is used.
Before the change, "dmesg" will show:
IOAPIC[0]: Set routing entry (8-1 -> 0x31 -> IRQ 1 Mode:0 Active:0)
IOAPIC[0]: Set routing entry (8-2 -> 0x30 -> IRQ 0 Mode:0 Active:0)
IOAPIC[0]: Set routing entry (8-3 -> 0x33 -> IRQ 3 Mode:0 Active:0) ...
After the change, you will see:
IOAPIC[0]: Set routing entry (8-1 -> 0x31 -> IRQ 1 Mode:0 Active:0 Dest:0)
IOAPIC[0]: Set routing entry (8-2 -> 0x30 -> IRQ 0 Mode:0 Active:0 Dest:0)
IOAPIC[0]: Set routing entry (8-3 -> 0x33 -> IRQ 3 Mode:0 Active:0 Dest:0) ...
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Link: http://lkml.kernel.org/r/20110708184603.2734.91071.sendpatchset@nchumbalkar.americas.cpqcorp.net
Signed-off-by: Ingo Molnar <mingo@elte.hu>
When IOAPIC data is displayed in "dmesg" with the help of the
boot parameter "apic=debug" certain values are not formatted
correctly wrt their size.
In the "dmesg" snippet below, note that the output for "max
redirection entries", and "IO APIC version" which are each
defined to be just 8-bits long are displayed as 2 bytes in
length. Similarly, "Dst" under the "IRQ redirection table"
should only be 8-bits long.
IO APIC #0......
...
...
.... register #01: 00170020
....... : max redirection entries: 0017
....... : PRQ implemented: 0
....... : IO APIC version: 0020
...
...
.... IRQ redirection table:
NR Dst Mask Trig IRR Pol Stat Dmod Deli Vect:
00 000 1 0 0 0 0 0 0 00
01 000 0 0 0 0 0 0 0 31
02 000 0 0 0 0 0 0 0 30
03 000 1 0 0 0 0 0 0 33
...
...
Do some formatting clean up, so you will see output like below:
IO APIC #0......
...
...
.... register #01: 00170020
....... : max redirection entries: 17
....... : PRQ implemented: 0
....... : IO APIC version: 20
...
...
.... IRQ redirection table:
NR Dst Mask Trig IRR Pol Stat Dmod Deli Vect:
00 00 1 0 0 0 0 0 0 00
01 00 0 0 0 0 0 0 0 31
02 00 0 0 0 0 0 0 0 30
03 00 1 0 0 0 0 0 0 33
...
...
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Link: http://lkml.kernel.org/r/20110708184557.2734.61830.sendpatchset@nchumbalkar.americas.cpqcorp.net
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Commit 2706a0bf7b ("x86, NUMA: Enable CONFIG_AMD_NUMA on 32bit
too") enabled AMD NUMA for 32bit too. Unfortunately, SPARSEMEM
on 32bit had rather coarse (512MiB) addr->node mapping
granularity due to lack of space in page->flags. This led to
boot failure on certain AMD NUMA machines which had 128MiB
alignment on nodes.
Patches to properly detect this condition and reject NUMA
configuration are posted[1] but deemed too pervasive for merge
at this point (-rc6). Disable AMD NUMA for 32bit for now and
re-enable once the detection logic is merged.
[1] http://thread.gmane.org/gmane.linux.kernel/1161279/focus=1162583
Reported-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Conny Seidel <conny.seidel@amd.com>
Link: http://lkml.kernel.org/r/20110711083432.GC943@htj.dyndns.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
In commit f0fba2ad (ASoC: multi-component - ASoC Multi-Component
Support), the name of the ak4104 codec driver was changed without
amending the platform code which uses it as well.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
The display requires some milliseconds between GPIO_TFT_VA_EN
and GPIO_DISPLAY_ENABLE. Reorder initialisation to comply with
the display spec.
Also tune timings for better compliance with the spec.
Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
Acked-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
The backlight control is going to change back to PWM in the
upcoming Raumfeld Controller hardware revision.
Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
Acked-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
The PXA platform code has a static inline helper called
gpio_to_chip which clashes with the gpiolib namespace if we
try to expose the function with the same name from gpiolib,
and it's still confusing even if we don't do that. So rename
it to gpio_to_pxachip().
Reported-by: H Hartley Sweeten <hartleys@visionengravers.com>
Cc: Eric Miao <eric.miao@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: 6994/1: smp_twd: Fix typo in 'twd_timer_rate' printing
ARM: 6987/1: l2x0: fix disabling function to avoid deadlock
ARM: 6966/1: ep93xx: fix inverted RTS/DTR signals on uart1
ARM: 6980/1: mmci: use StartBitErr to detect bad connections
ARM: 6979/1: mach-vt8500: add forgotten irq_data conversion
ARM: move memory layout sanity checking before meminfo initialization
ARM: 6990/1: MAINTAINERS: add entry for ARM PMU profiling and debugging
ARM: 6989/1: perf: do not start the PMU when no events are present
ARM: dmabounce: fix map_single() error return value
Add a power domain workaround for the VPU and A3RV on sh7372.
The sh7372 data sheet mentions that the VPU is located in the
A3RV power domain. The A3RV power domain is not related to A4LC
in any way, but testing shows that unless A3RV _and_ A4LC are
powered on the VPU test program will bomb out.
This issue may be caused by a more or less undocumented dependency
on the MERAM block that happens to be located in A4LC. So now we
know that the out-of-reset requirement of the VPU is that the MERAM
is powered on.
This patch adds a workaround for A3RV to make sure A4LC is powered
on - this so we can use the VPU even though the LCDCs are in blanking
state and A4LC is supposed to be off.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Add sh7372 specific code to power down unused pm domains.
This should really be replaced by some generic PM core
code IMO, but until that happens this patch makes sure
we don't waste power by leaving unused power domains on.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Add a mach-shmobile specific callback for SoC-specific code
to hook into. By having the late_initcall() in a common place
we can have multi-SoC/board support in the same kernel binary.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Add support for the sh7372 D4 power domain. This power domain
contains the Coresight-ETM hardware block.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Add support for the sh7372 A4MP power domain
and hook up the FSI/SPU2 device.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
FSI act as peripheral circuits of the SPU2.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: S3C2440: fix section mismatch on mini2440
ARM: S3C24XX: drop return codes in void function of dma.c
ARM: S3C24XX: don't use uninitialized variable in dma.c
ARM: EXYNOS4: Set appropriate I2C device variant
ARM: S5PC100: Fix for compilation error
spi/s3c64xx: Bug fix for SPI with different FIFO level
ARM: SAMSUNG: Add tx_st_done variable
ARM: EXYNOS4: Address a section mismatch w/ suspend issue.
ARM: S5P: Fix bug on init of PWMTimers for HRTimer
ARM: SAMSUNG: header file revised to prevent declaring duplicated
ARM: EXYNOS4: fix improper gpio configuration
ARM: EXYNOS4: Fix card detection for sdhci 0 and 2
Detect Xen before HyperV because in Viridian compatibility mode Xen
presents itself as HyperV. Move Xen to the top since it seems more
likely that Xen would emulate VMware than vice versa.
Signed-off-by: Anupam Chanda <achanda@nicira.com>
Link: http://lkml.kernel.org/r/1310150570-26810-1-git-send-email-achanda@nicira.com
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Reviewed-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
nr_cpus allows one to specify number of possible cpus in the system.
Current assumption seems to be that first cpu to show up is boot cpu
and this assumption will be broken in kdump scenario where we can be
booting on a non boot cpu with nr_cpus=1.
It might happen that first cpu we parse is not the cpu we boot on and
later we ignore boot cpu. Though code later seems to recognize this
anomaly and forcibly sets boot cpu in physical cpu map with following
warning.
if (!physid_isset(hard_smp_processor_id(), phys_cpu_present_map)) {
printk(KERN_WARNING
"weird, boot CPU (#%d) not listed by the BIOS.\n",
hard_smp_processor_id());
physid_set(hard_smp_processor_id(), phys_cpu_present_map);
}
This patch waits for boot cpu to show up and starts ignoring the cpus
once we have hit (nr_cpus - 1) number of cpus. So effectively we are
reserving one slot out of nr_cpus for boot cpu explicitly.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20110708171926.GF2930@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
The patch removes MXC_GPIO_IRQS and instead uses ARCH_NR_GPIOS to
define gpio number. This change is need when we change mxc gpio
driver to be device tree aware. When migrating the driver to device
tree, pdev->id becomes unusable. It requires driver get gpio range
from gpio core, which will dynamically allocates number from
ARCH_NR_GPIOS to 0.
As a bonus point, it removes lines of '#if' and make the code a
little bit cleaner. The side effect is the waste of number. But
this is not a point when we go single image.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
The patch removes all the uses of cpu_is_mx(). Instead, it utilizes
platform_device_id to distinguish the different gpio types, IMX1_GPIO
on i.mx1, IMX21_GPIO on i.mx21 and i.mx27, IMX31_GPIO on all other
i.mx SoCs.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
omap: drop __initdata tags from static struct platform_device declarations
If mini2440_init() is in __init, mini2440_parse_features() should also
be in __init. Fixes:
(.text+0x9adc): Section mismatch in reference from the function mini2440_parse_features.clone.0() to the
(unknown reference) .init.data:(unknown)
The function mini2440_parse_features.clone.0() references the (unknown reference) __initdata (unknown).
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Michel Pollet <buserror@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Commit bb072c3c (ARM / Samsung: Use struct syscore_ops for "core" power
management) turned s3c2410_dma_resume_chan() from int to void. So, drop
the actual return values, too. Fixes:
arch/arm/plat-s3c24xx/dma.c: In function 's3c2410_dma_resume_chan':
arch/arm/plat-s3c24xx/dma.c:1238:3: warning: 'return' with a value, in function returning void
arch/arm/plat-s3c24xx/dma.c:1250:2: warning: 'return' with a value, in function returning void
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Commit 8970ef47 (S3C24XX: Remove hardware specific registers from DMA
calls) removed the parameter dcon in s3c2410_dma_config() and calculates
it on its own. So the debug-output for the old parameter can go, too.
Fixes:
arch/arm/plat-s3c24xx/dma.c: In function 's3c2410_dma_config':
arch/arm/plat-s3c24xx/dma.c:1030:2: warning: 'dcon' is used uninitialized in this function
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Don't use the EFI reboot method by default
x86, suspend: Restore MISC_ENABLE MSR in realmode wakeup
x86, reboot: Acer Aspire One A110 reboot quirk
x86-32, NUMA: Fix boot regression caused by NUMA init unification on highmem machines
I triggered a triple fault with gcc 4.5.1 because it did not
honor the inline annotation to arch_local_save_flags() function
and that function was added to the pool of functions traced by
the function tracer.
When preempt_schedule() called arch_local_save_flags() (called
by irqs_disabled()), it was traced, but the first thing the
function tracer does is disable preemption. When it enables
preemption, the NEED_RESCHED flag will not have been cleared and
the preemption check will trigger the call to preempt_schedule()
again.
Although the dynamic function tracer crashed immediately, the
static version of the function tracer (CONFIG_DYNAMIC_FTRACE is
not set) actually was able to show where the problem was.
swapper-1 3.N.. 103885us : arch_local_save_flags <-preempt_schedule
swapper-1 3.N.. 103886us : arch_local_save_flags <-preempt_schedule
swapper-1 3.N.. 103886us : arch_local_save_flags <-preempt_schedule
swapper-1 3.N.. 103887us : arch_local_save_flags <-preempt_schedule
swapper-1 3.N.. 103887us : arch_local_save_flags <-preempt_schedule
swapper-1 3.N.. 103888us : arch_local_save_flags <-preempt_schedule
swapper-1 3.N.. 103888us : arch_local_save_flags <-preempt_schedule
It went on for a while before it triple faulted with a corrupted
stack.
The arch_local_save_flags and arch_local_irq_* functions should
not be traced. Even though they are marked as inline, gcc may
still make them a function and enable tracing of them.
The simple solution is to just mark them as notrace. I had to
add the <linux/types.h> for this file to include the notrace
tag.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20110702033852.733414762@goodmis.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Previously we would check for acpi_sci_override_gsi == gsi every time
a PCI device was enabled. That works during early bootup, but later
on it could lead to triggering unnecessarily the acpi_gsi_to_irq(..) lookup.
The reason is that acpi_sci_override_gsi was declared in __initdata and
after early bootup could contain bogus values.
This patch moves the check for acpi_sci_override_gsi to the
site where the ACPI SCI is preset.
CC: stable@kernel.org
Reported-by: Raghavendra D Prabhu <rprabhu@wnohang.net>
Tested-by: Raghavendra D Prabhu <rprabhu@wnohang.net>
[http://lists.xensource.com/archives/html/xen-devel/2011-07/msg00154.html]
Suggested-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This fixes a regression introduced by e59347a "arm: orion:
Use generic irq chip".
Depending on the device, interrupts acknowledgement is done by setting
or by clearing a dedicated register. Replace irq_gc_ack() with some
{set,clr}_bit variants allows to handle both cases.
Note that this patch affects the following SoCs: Davinci, Samsung and
Orion. Except for this last, the change is minor: irq_gc_ack() is just
renamed into irq_gc_ack_set_bit().
For the Orion SoCs, the edge GPIO interrupts support is currently
broken. irq_gc_ack() try to acknowledge a such interrupt by setting
the corresponding cause register bit. The Orion GPIO device expect the
opposite. To fix this issue, the irq_gc_ack_clr_bit() variant is used.
Tested on Network Space v2.
Reported-by: Joey Oravec <joravec@drewtech.com>
Signed-off-by: Simon Guinot <sguinot@lacie.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This platform has not been converted to 'struct irq_data' when the big
pile was done. It fails to compile nowadays, because the compatibility
code has gone.
CC arch/arm/mach-vt8500/irq.o
arch/arm/mach-vt8500/irq.c:118:2: error: unknown field 'ack' specified in initializer
arch/arm/mach-vt8500/irq.c:118:2: warning: initialization from incompatible pointer type
arch/arm/mach-vt8500/irq.c:119:2: error: unknown field 'mask' specified in initializer
arch/arm/mach-vt8500/irq.c:119:2: warning: initialization from incompatible pointer type
arch/arm/mach-vt8500/irq.c:120:2: error: unknown field 'unmask' specified in initializer
arch/arm/mach-vt8500/irq.c:120:2: warning: initialization from incompatible pointer type
arch/arm/mach-vt8500/irq.c:121:2: error: unknown field 'set_type' specified in initializer
arch/arm/mach-vt8500/irq.c:121:2: warning: initialization from incompatible pointer type
make[1]: *** [arch/arm/mach-vt8500/irq.o] Error 1
Add the missing conversion. Tested on a JayPC-Tablet.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Alexey Charkov <alchark@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
To get hundredths of MHz the rate needs to be divided by 10'000.
Here is an example:
twd_timer_rate = 123456789
Before the patch:
twd_timer_rate / 1000000 = 123
(twd_timer_rate / 1000000) % 100 = 23
Result: 123.23MHz.
After being fixed:
twd_timer_rate / 1000000 = 123
(twd_timer_rate / 10000) % 100 = 45
Result: 123.45MHz.
Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Testing suggests that at least some Lenovos and some Intels will
fail to reboot via EFI, attempting to jump to an unmapped
physical address. In the long run we could handle this by
providing a page table with a 1:1 mapping of physical addresses,
but for now it's probably just easier to assume that ACPI or
legacy methods will be present and reboot via those.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/1309985557-15350-1-git-send-email-mjg@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Some BIOSes will reset the Intel MISC_ENABLE MSR (specifically the
XD_DISABLE bit) when resuming from S3, which can interact poorly with
ebba638ae7. In 32bit PAE mode, this can
lead to a fault when EFER is restored by the kernel wakeup routines,
due to it setting the NX bit for a CPU that (thanks to the BIOS reset)
now incorrectly thinks it lacks the NX feature. (64bit is not affected
because it uses a common CPU bring-up that specifically handles the
XD_DISABLE bit.)
The need for MISC_ENABLE being restored so early is specific to the S3
resume path. Normally, MISC_ENABLE is saved in save_processor_state(),
but this happens after the resume header is created, so just reproduce
the logic here. (acpi_suspend_lowlevel() creates the header, calls
do_suspend_lowlevel, which calls save_processor_state(), so the saved
processor context isn't available during resume header creation.)
[ hpa: Consider for stable if OK in mainline ]
Signed-off-by: Kees Cook <kees.cook@canonical.com>
Link: http://lkml.kernel.org/r/20110707011034.GA8523@outflux.net
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: <stable@kernel.org> 2.6.38+
The l2x0_disable function attempts to writel with the l2x0_lock held.
This results in deadlock when the writel contains an outer_sync call
for the platform since the l2x0_lock is already held by the disable
function. A further problem is that disabling the L2 without flushing it
first can lead to the spin_lock operation becoming visible after the
spin_unlock, causing any subsequent L2 maintenance to deadlock.
This patch replaces the writel with a call to writel_relaxed in the
disabling code and adds a flush before disabling in the control
register, preventing livelock from occurring.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
It was discovered by Roberto Bergo, that RTS/DTR signals are inverted after
the boot, because it was causing him problems with hardware controlled modem
connected on ttyAM0. Todd Valentic came with this patch for the issue.
Discussion: http://tech.groups.yahoo.com/group/ts-7000/message/20259
Comments from Petr Štetiar:
Sorry, but forget to add Acked-by[1]:
1. https://patchwork.kernel.org/patch/873052/
Cc: Ryan Mallon <ryan@bluewatersys.com>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Todd Valentic <todd.valentic@sri.com>
Tested-by: Roberto Bergo <roberto.bergo@robson.it>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This platform has not been converted to 'struct irq_data' when the big
pile was done and fails to compile nowadays. Tested on a JayPC-Tablet.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
GPIO drivers are getting consolidated into drivers/gpio. While at it,
change the driver name to mpc5200-gpio* to avoid collisions.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
The original pair of <0x01db, 208000000> is invalid. Correct it to
the valid value.
The 6th bit of the NFC APMU register indicates NFC works whether
at 156Mhz or 78Mhz. So 0x19b indicates NFC works at 156Mhz, and
0x1db indicates it works at 78Mhz.
Signed-off-by: Lei Wen <leiwen@marvell.com>
Cc: stable@kernel.org
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
The original pair of <0x01db, 208000000> is invalid.
Correct to the valid value.
Signed-off-by: Lei Wen <leiwen@marvell.com>
Cc: stable@kernel.org
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
The file mfp-pxa2xx.c defines a macro, PGSR(), which translates a gpio
bank number to a PGSR register address. The function pxa2xx_mfp_suspend()
erroneously passed in a gpio number instead of a gpio bank number.
Signed-off-by: Paul Parsons <lost.distance@yahoo.com>
Cc: stable@kernel.org
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
The function leon_flush_needed() is called only during bootup from another
__init function. Therefore, we can also add __init to leon_flush_needed().
Signed-off-by: Matthias Rosenfelder <rosenfelder.lkml@googlemail.com>
Acked-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Do not trace arch_local_save_flags(), arch_local_irq_*() and friends.
Although they are marked inline, gcc may still make a function out of
them and add it to the pool of functions that are traced by the function
tracer. This can cause undesirable results (kernel panic, triple faults,
etc).
Add the notrace notation to prevent them from ever being traced.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Set up a correct I2C bus controller variant name for Exynos4.
Without this change the I2C bus driver fails to acquire its
clocks.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
tx_st_done is required for checking the transmission status of SPI
channels with different fifo levels
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Since git commit
660e34cebf x86: reorder reboot method
preferences,
my Acer Aspire One hangs on reboot. It appears that its ACPI method
for rebooting is broken. The attached patch adds a quirk so that the
machine will reboot via the BIOS.
[ hpa: verified that the ACPI control on this machine is just plain broken. ]
Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au>
Link: http://lkml.kernel.org/r/w439iki5vl.wl%25peter@chubb.wattle.id.au
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The section mismatch in headsmp.S made hotplug stop working after the
first instance of suspend-to-RAM and its wakeup.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This patch fixes following.
<6>[ 0.000000] sched_clock: 32 bits at 33MHz, ...
<6>[ 128.651309] Calibrating delay loop...
There is a big jump. The reason is that PWM Timer which
is for HRTimer was used before its initialization.
So this patch changes its order and following is kernel
boot log message after this.
<6>[ 0.000000] sched_clock: 32 bits at 33MHz, ...
<6>[ 0.000088] Calibrating delay loop...
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
There has been no #ifndef - #define - #endif protection for this
header file.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
These pins are incorrectly configured for PCM2
configure them to SPDIF(_OUT & _EXT_CLK)
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
On SMDKV310 board, a card detect gpio pin is available that is directly
connected to the io pad of the sdhci controller. Fix incorrect value
of cd_type field in platform data for sdhci instance 0 and 2.
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Ensure that the meminfo array is sanity checked before we pass the
memory to memblock. This helps to ensure that memblock and meminfo
agree on the dimensions of memory, especially when more memory is
passed than the kernel can deal with.
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
So that it can handle the new CONFIG_PREEMPT_COUNT.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Use the generic preempt config definition in m32r instead of
using a custom one.
This also makes it handle the new CONFIG_PREEMPT_COUNT that
need to be selected by CONFIG_PREEMPT.
Without that it breaks
kernel/sched.c: In function 'preempt_schedule':
kernel/sched.c:4364: error: implicit declaration of function 'add_preempt_count_notrace'
kernel/sched.c:4366: error: implicit declaration of function 'sub_preempt_count_notrace'
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Consumers of the table pointers in struct efi check for
EFI_INVALID_TABLE_ADDR to determine validity, hence these
pointers should all be pre-initialized to this value (rather
than zero).
Noticed by the discrepancy between efivars' systab sysfs entry
showing all tables (and their pointers) despite the code
intending to only display the valid ones. No other bad effects
known, but having the various table parsing routines bogusly
access physical address zero is certainly not very desirable
(even though they're unlikely to find anything useful there).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Link: http://lkml.kernel.org/r/4E13100A020000780004C256@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
armpmu_enable can be called in situations where no events are present
(for example, from the event rotation tick after a profiled task has
exited). In this case, we currently start the PMU anyway which may
leave it active inevitably without any events being monitored.
This patch adds a simple check to the enabling code so that we avoid
starting the PMU when no events are present.
Cc: <stable@kernel.org>
Reported-by: Ashwin Chaugle <ashwinc@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc:
AT91: Change nand buswidth logic to match hardware default configuration
at91: Use "pclk" as con_id on at91cap9 and at91rm9200
at91: fix udc, ehci and mmc clock device name for cap9/9g45/9rl
atmel_serial: fix internal port num
at91: fix at91_set_serial_console: use platform device id
The recently modified nand buswitth configuration is not aligned with
board reality: the double footprint on boards is always populated with 8bits
buswidth nand flashes.
So we have to consider that without particular configuration the 8bits
buswidth is selected by default.
Moreover, the previous logic was always using !board_have_nand_8bit(), we
change it to a simpler: board_have_nand_16bit().
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Not used anymore as the spi_s3c24xx_gpio driver is gone (replaced by
the generic spi-gpio).
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Not needed, and the file is going away.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Ingo Molnar