There are now two almost identical implementations of an MSI bitmap
allocator, one in mpic_msi.c and the other in fsl_msi.c.
Merge them together and put the result in msi_bitmap.c. Some of the
MPIC bits will remain to provide a nicer interface for the MPIC users.
In the process we fix two buglets. The first is that the allocation
routines, now msi_bitmap_alloc_hwirqs(), returned an unsigned result,
even though they use -1 to indicate allocation failure. Although all
the callers were checking correctly, it is much better for the routine
to just return an int. At least until someone wants > ~2 billion MSIs.
The second buglet is that the device tree reservation logic only
allowed power-of-two reservations. AFAICT that didn't effect any
existing code but it's nicer if we can reserve arbitrary irqs from MSI
use.
We also add some selftests, which exposed the two buglets and now test
for them, as well as some basic sanity tests. The tests are only built
when CONFIG_DEBUG_KERNEL=y.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This patch removes code that became unused through IDE changes and the
arch/ppc/ removal.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Use the generic compat_sys_old_readdir instead of the powerpc one which
is almost the same except for the almost complete lack of error
handling.
Note that we can't just use SYSCALL() in systbl.h because the native
syscall is named old_readdir, not sys_old_readdir.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
During platform setup, save off the primary/secondary paging space
pool IDs and the page size. Added accessors in hvcall.h for these
variables. This is needed for a subsequent fix.
Submitted-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
A small bogon sneaked into the ppc64 lockdep support. A test is
branching slightly off causing a clobbered register value to
overwrite the irq state under some circumstances.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
When we fork, init_new_context() improperly resets the vdso_base
of the new context to 0. That means that the new process loses
access to the vdso for signal trampolines.
The initialization should be unnecessary anyway as the context
on a fresh mm should be 0 in the first place and binfmt_elf
will initialize that value for a newly loaded process.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE, because control
page is used for not only code on some platform. For example in kexec
jump, it is used for data and stack too.
[akpm@linux-foundation.org: unbreak powerpc and arm, finish conversion]
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
powerpc: Remove include/linux/harrier_defs.h
powerpc: Do not ignore arch/powerpc/include
powerpc: Delete completed "ppc removal" task from feature removal file
powerpc/mm: Fix attribute confusion with htab_bolt_mapping()
powerpc/pci: Don't keep ISA memory hole resources in the tree
powerpc: Zero fill the return values of rtas argument buffer
powerpc/4xx: Update defconfig files for 2.6.27-rc1
powerpc/44x: Incorrect NOR offset in Warp DTS
powerpc/44x: Warp DTS changes for board updates
powerpc/4xx: Cleanup Warp for i2c driver changes.
powerpc/44x: Adjust warp-nand resource end address
The function htab_bolt_mapping() is used to create permanent
mappings in the MMU hash table, for example, in order to create
the linear mapping of vmemmap. It's also used by early boot
ioremap (before mem_init_done).
However, the way ioremap uses it is incorrect as it passes it the
protection flags in the "linux PTE" form while htab_bolt_mapping()
expects them in the hash table format. This is made more confusing by
the fact that some of those flags are actually in the same position in
both cases.
This fixes it all by making htab_bolt_mapping() take normal linux
protection flags instead, and use a little helper to convert them to
htab flags. Callers can now use the usual PAGE_* definitions safely.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/include/asm/mmu-hash64.h | 2 -
arch/powerpc/mm/hash_utils_64.c | 65 ++++++++++++++++++++--------------
arch/powerpc/mm/init_64.c | 9 +---
3 files changed, 44 insertions(+), 32 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>
Now that arch/ppc is gone and CONFIG_PPC_MERGE is always set, remove
the dead code associated with !CONFIG_PPC_MERGE from arch/powerpc
and include/asm-powerpc.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
from include/asm-powerpc. This is the result of a
mkdir arch/powerpc/include/asm
git mv include/asm-powerpc/* arch/powerpc/include/asm
Followed by a few documentation/comment fixups and a couple of places
where <asm-powepc/...> was being used explicitly. Of the latter only
one was outside the arch code and it is a driver only built for powerpc.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Michael Ellerman