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12 years agomm: use mm->exe_file instead of first VM_EXECUTABLE vma->vm_file
Konstantin Khlebnikov [Fri, 28 Sep 2012 00:19:05 +0000 (10:19 +1000)]
mm: use mm->exe_file instead of first VM_EXECUTABLE vma->vm_file

Some security modules and oprofile still uses VM_EXECUTABLE for retrieving
a task's executable file.  After this patch they will use mm->exe_file
directly.  mm->exe_file is protected with mm->mmap_sem, so locking stays
the same.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com> [arch/tile]
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> [tomoyo]
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agomm: kill vma flag VM_CAN_NONLINEAR
Konstantin Khlebnikov [Fri, 28 Sep 2012 00:19:05 +0000 (10:19 +1000)]
mm: kill vma flag VM_CAN_NONLINEAR

Move actual pte filling for non-linear file mappings into the new special
vma operation: ->remap_pages().

Filesystems must implement this method to get non-linear mapping support,
if it uses filemap_fault() then generic_file_remap_pages() can be used.

Now device drivers can implement this method and obtain nonlinear vma support.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com> #arch/tile
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agomm: kill vma flag VM_INSERTPAGE
Konstantin Khlebnikov [Fri, 28 Sep 2012 00:19:05 +0000 (10:19 +1000)]
mm: kill vma flag VM_INSERTPAGE

Merge VM_INSERTPAGE into VM_MIXEDMAP.  VM_MIXEDMAP VMA can mix pure-pfn
ptes, special ptes and normal ptes.

Now copy_page_range() always copies VM_MIXEDMAP VMA on fork like
VM_PFNMAP.  If driver populates whole VMA at mmap() it probably not
expects page-faults.

This patch removes special check from vma_wants_writenotify() which
disables pages write tracking for VMA populated via vm_instert_page().
BDI below mapped file should not use dirty-accounting, moreover
do_wp_page() can handle this.

vm_insert_page() still marks vma after first usage.  Usually it is called
from f_op->mmap() handler under mm->mmap_sem write-lock, so it able to
change vma->vm_flags.  Caller must set VM_MIXEDMAP at mmap time if it
wants to call this function from other places, for example from page-fault
handler.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agomm: introduce arch-specific vma flag VM_ARCH_1
Konstantin Khlebnikov [Fri, 28 Sep 2012 00:19:04 +0000 (10:19 +1000)]
mm: introduce arch-specific vma flag VM_ARCH_1

Combine several arch-specific vma flags into one.

before patch:

        0x00000200      0x01000000      0x20000000      0x40000000
x86     VM_NOHUGEPAGE   VM_HUGEPAGE     -               VM_PAT
powerpc -               -               VM_SAO          -
parisc  VM_GROWSUP      -               -               -
ia64    VM_GROWSUP      -               -               -
nommu   -               VM_MAPPED_COPY  -               -
others  -               -               -               -

after patch:

        0x00000200      0x01000000      0x20000000      0x40000000
x86     -               VM_PAT          VM_HUGEPAGE     VM_NOHUGEPAGE
powerpc -               VM_SAO          -               -
parisc  -               VM_GROWSUP      -               -
ia64    -               VM_GROWSUP      -               -
nommu   -               VM_MAPPED_COPY  -               -
others  -               VM_ARCH_1       -               -

And voila! One completely free bit.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agomm, x86, pat: rework linear pfn-mmap tracking
Konstantin Khlebnikov [Fri, 28 Sep 2012 00:19:04 +0000 (10:19 +1000)]
mm, x86, pat: rework linear pfn-mmap tracking

Replace the generic vma-flag VM_PFN_AT_MMAP with x86-only VM_PAT.

We can toss mapping address from remap_pfn_range() into
track_pfn_vma_new(), and collect all PAT-related logic together in
arch/x86/.

This patch also restores orignal frustration-free is_cow_mapping() check
in remap_pfn_range(), as it was before commit v2.6.28-rc8-88-g3c8bb73
("x86: PAT: store vm_pgoff for all linear_over_vma_region mappings - v3")

is_linear_pfn_mapping() checks can be removed from mm/huge_memory.c,
because it already handled by VM_PFNMAP in VM_NO_THP bit-mask.

[suresh.b.siddha@intel.com: Reset the VM_PAT flag as part of untrack_pfn_vma()]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agox86-pat-separate-the-pfn-attribute-tracking-for-remap_pfn_range-and-vm_insert_pfn-fix
Andrew Morton [Fri, 28 Sep 2012 00:19:04 +0000 (10:19 +1000)]
x86-pat-separate-the-pfn-attribute-tracking-for-remap_pfn_range-and-vm_insert_pfn-fix

tweak a few comments

Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agox86, pat: separate the pfn attribute tracking for remap_pfn_range and vm_insert_pfn
Suresh Siddha [Fri, 28 Sep 2012 00:19:03 +0000 (10:19 +1000)]
x86, pat: separate the pfn attribute tracking for remap_pfn_range and vm_insert_pfn

With PAT enabled, vm_insert_pfn() looks up the existing pfn memory
attribute and uses it.  Expectation is that the driver reserves the memory
attributes for the pfn before calling vm_insert_pfn().

remap_pfn_range() (when called for the whole vma) will setup a new
attribute (based on the prot argument) for the specified pfn range.  This
addresses the legacy usage which typically calls remap_pfn_range() with a
desired memory attribute.  For ranges smaller than the vma size (which is
typically not the case), remap_pfn_range() will use the existing memory
attribute for the pfn range.

Expose two different API's for these different behaviors.
track_pfn_insert() for tracking the pfn attribute set by vm_insert_pfn()
and track_pfn_remap() for the remap_pfn_range().

This cleanup also prepares the ground for the track/untrack pfn vma routines
to take over the ownership of setting PAT specific vm_flag in the 'vma'.

[khlebnikov@openvz.org: Clear checks in track_pfn_remap()]
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agox86, pat: remove the dependency on 'vm_pgoff' in track/untrack pfn vma routines
Suresh Siddha [Fri, 28 Sep 2012 00:19:03 +0000 (10:19 +1000)]
x86, pat: remove the dependency on 'vm_pgoff' in track/untrack pfn vma routines

'pfn' argument for track_pfn_vma_new() can be used for reserving the
attribute for the pfn range.  No need to depend on 'vm_pgoff'

Similarly, untrack_pfn_vma() can depend on the 'pfn' argument if it is
non-zero or can use follow_phys() to get the starting value of the pfn
range.

Also the non zero 'size' argument can be used instead of recomputing it
from vma.

This cleanup also prepares the ground for the track/untrack pfn vma
routines to take over the ownership of setting PAT specific vm_flag in the
'vma'.

[khlebnikov@openvz.org: Clear pfn to paddr conversion]
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agomm: remove __GFP_NO_KSWAPD
Rik van Riel [Fri, 28 Sep 2012 00:19:03 +0000 (10:19 +1000)]
mm: remove __GFP_NO_KSWAPD

When transparent huge pages were introduced, memory compaction and swap
storms were an issue, and the kernel had to be careful to not make THP
allocations cause pageout or compaction.

Now that we have working compaction deferral, kswapd is smart enough to
invoke compaction and the quadratic behaviour around isolate_free_pages
has been fixed, it should be safe to remove __GFP_NO_KSWAPD.

[minchan@kernel.org: Comment fix]
[mgorman@suse.de: Avoid direct reclaim for deferred compaction]
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agomm/page_alloc.c: remove duplicate check
Gavin Shan [Fri, 28 Sep 2012 00:19:02 +0000 (10:19 +1000)]
mm/page_alloc.c: remove duplicate check

While allocating pages using buddy allocator, the compound page is
probably split up to free pages.  Under these circumstances, the compound
page should be destroyed by destroy_compound_page().  However, there is a
duplicate check to judge if the page is compound.

Remove the duplicate check since the compound_order() returns 0 when the
page doesn't have PG_head set in destroy_compound_page().  That is to say,
destroy_compound_page() needn't check PageHead().

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agofs/block_dev.c: no need to check inode->i_bdev in bd_forget()
Yan Hong [Fri, 28 Sep 2012 00:19:02 +0000 (10:19 +1000)]
fs/block_dev.c: no need to check inode->i_bdev in bd_forget()

Its only caller evict() has promised a non-NULL inode->i_bdev.

Signed-off-by: Yan Hong <clouds.yan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agofs: change return values from -EACCES to -EPERM
Zhao Hongjiang [Fri, 28 Sep 2012 00:19:01 +0000 (10:19 +1000)]
fs: change return values from -EACCES to -EPERM

According to SUSv3:

[EACCES] Permission denied. An attempt was made to access a file in a way
forbidden by its file access permissions.

[EPERM] Operation not permitted. An attempt was made to perform an operation
limited to processes with appropriate privileges or to the owner of a file
or other resource.

So -EPERM should be returned if capability checks fails.

Strictly speaking this is an API change since the error code user sees is

Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Acked-by: Jan Kara <jack@suse.cz>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Acked-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agovfs: increment iversion when a file is truncated
Dmitry Kasatkin [Fri, 28 Sep 2012 00:19:01 +0000 (10:19 +1000)]
vfs: increment iversion when a file is truncated

When a file is truncated with truncate()/ftruncate() and then closed,
iversion is not updated.  This patch uses ATTR_SIZE flag as an indication
to increment iversion.

Mimi said:

On fput(), i_version is used to detect and flag files that have changed
and need to be re-measured in the IMA measurement policy.  When a file
is truncated with truncate()/ftruncate() and then closed, i_version is
not updated.  As a result, although the file has changed, it will not be
re-measured and added to the IMA measurement list on subsequent access.

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agodrbd: use copy_highpage
Akinobu Mita [Fri, 28 Sep 2012 00:19:00 +0000 (10:19 +1000)]
drbd: use copy_highpage

Use copy_highpage() to copy from one page to another.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Lars Ellenberg <drbd-dev@lists.linbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoblock: partition: msdos: provide UUIDs for partitions
Stephen Warren [Fri, 28 Sep 2012 00:19:00 +0000 (10:19 +1000)]
block: partition: msdos: provide UUIDs for partitions

The MSDOS/MBR partition table includes a 32-bit unique ID, often referred
to as the NT disk signature.  When combined with a partition number within
the table, this can form a unique ID similar in concept to EFI/GPT's
partition UUID.  Constructing and recording this value in struct
partition_meta_info allows MSDOS partitions to be referred to on the
kernel command-line using the following syntax:

root=PARTUUID=0002dd75-01

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoinit: reduce PARTUUID min length to 1 from 36
Stephen Warren [Fri, 28 Sep 2012 00:19:00 +0000 (10:19 +1000)]
init: reduce PARTUUID min length to 1 from 36

Reduce the minimum length for a root=PARTUUID= parameter to be considered
valid from 36 to 1.  EFI/GPT partition UUIDs are always exactly 36
characters long, hence the previous limit.  However, the next patch will
support DOS/MBR UUIDs too, which have a different, shorter, format.
Instead of validating any particular length, just ensure that at least
some non-empty value was given by the user.

Also, consider a missing UUID value to be a parsing error, in the same
vein as if /PARTNROFF exists and can't be parsed.  As such, make both
error cases print a message and disable rootwait.  Convert to pr_err while
we're at it.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoblock: store partition_meta_info.uuid as a string
Stephen Warren [Fri, 28 Sep 2012 00:18:59 +0000 (10:18 +1000)]
block: store partition_meta_info.uuid as a string

This will allow other types of UUID to be stored here, aside from true
UUIDs.  This also simplifies code that uses this field, since it's usually
constructed from a, used as a, or compared to other, strings.

Note: A simplistic approach here would be to set uuid_str[36]=0 whenever a
/PARTNROFF option was found to be present.  However, this modifies the
input string, and causes subsequent calls to devt_from_partuuid() not to
see the /PARTNROFF option, which causes different results.  In order to
avoid misleading future maintainers, this parameter is marked const.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agocciss: use check_signature()
Akinobu Mita [Fri, 28 Sep 2012 00:18:59 +0000 (10:18 +1000)]
cciss: use check_signature()

Use check_signature() to find a signature in the mmio address.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mike Miller <mike.miller@hp.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agocciss: cleanup bitops usage
Akinobu Mita [Fri, 28 Sep 2012 00:18:59 +0000 (10:18 +1000)]
cciss: cleanup bitops usage

- Remove unnecessary correction of bit and address
- Use BITS_TO_LONGS macro to calculate bitmap size
- Use bitmap_zero()

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mike Miller <mike.miller@hp.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoreadahead: fault retry breaks mmap file read random detection
Shaohua Li [Fri, 28 Sep 2012 00:18:58 +0000 (10:18 +1000)]
readahead: fault retry breaks mmap file read random detection

.fault now can retry.  The retry can break state machine of .fault.  In
filemap_fault, if page is miss, ra->mmap_miss is increased.  In the second
try, since the page is in page cache now, ra->mmap_miss is decreased.  And
these are done in one fault, so we can't detect random mmap file access.

Add a new flag to indicate .fault is tried once.  In the second try, skip
ra->mmap_miss decreasing.  The filemap_fault state machine is ok with it.

I only tested x86, didn't test other archs, but looks the change for other
archs is obvious, but who knows :)

Signed-off-by: Shaohua Li <shaohua.li@fusionio.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoh8300: select generic atomic64_t support
Fengguang Wu [Fri, 28 Sep 2012 00:18:56 +0000 (10:18 +1000)]
h8300: select generic atomic64_t support

Rationales from Eric:

So I just looked a little deeper and it appears architectures that do
not support atomic64_t are broken.

The generic atomic64 support came in 2009 to support the perf subsystem
with the expectation that all architectures would implement atomic64
support.

Furthermore upon inspection of the kernel atomic64_t is used in a fair
number of places beyond the performance counters:

block/blk-cgroup.c
drivers/acpi/apei/
drivers/block/rbd.c
drivers/crypto/nx/nx.h
drivers/gpu/drm/radeon/radeon.h
drivers/infiniband/hw/ipath/
drivers/infiniband/hw/qib/
drivers/staging/octeon/
fs/xfs/
include/linux/perf_event.h
include/net/netfilter/nf_conntrack_acct.h
kernel/events/
kernel/trace/
net/mac80211/key.h
net/rds/

The block control group, infiniband, xfs, crypto, 802.11, netfilter.
Nothing quite so fundamental as fs/namespace.c but definitely in
multiplatform-code that should work, and is already broken on those
architecutres.

Looking at the implementation of atomic64_add_return in lib/atomic64.c the
code looks as efficient as these kinds of things get.

Which leads me to the conclusion that we need atomic64 support on all
architectures.

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agocompiler-gcc4.h: correct verion check for __compiletime_error
Daniel Santos [Fri, 28 Sep 2012 00:18:55 +0000 (10:18 +1000)]
compiler-gcc4.h: correct verion check for __compiletime_error

__attribute__((error(msg))) was introduced in gcc 4.3 (not 4.4) and as I
was unable to find any gcc bugs pertaining to it, I'm presuming that it
has functioned as advertised since 4.3.0.

Signed-off-by: Daniel Santos <daniel.santos@pobox.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agotime: don't inline EXPORT_SYMBOL functions
Greg Kroah-Hartman [Fri, 28 Sep 2012 00:18:55 +0000 (10:18 +1000)]
time: don't inline EXPORT_SYMBOL functions

How is the compiler even handling exported functions that are marked
inline?  Anyway, these shouldn't be inline because of that, so remove that
marking.

Based on a larger patch by Mark Charlebois to get LLVM to build the
kernel.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mark Charlebois <mcharleb@qualcomm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: hank <pyu@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agotimeconst.pl: remove deprecated defined(@array)
Dagfinn Ilmari Mannsåker [Fri, 28 Sep 2012 00:18:54 +0000 (10:18 +1000)]
timeconst.pl: remove deprecated defined(@array)

The use of defined() on arrays and hashes has been deprecated since perl
5.6, but until 5.17.6 it only warned on lexicals, not package globals.

Signed-off-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agodrm/i915: optimize DIV_ROUND_CLOSEST() call
Jean Delvare [Fri, 28 Sep 2012 00:18:54 +0000 (10:18 +1000)]
drm/i915: optimize DIV_ROUND_CLOSEST() call

DIV_ROUND_CLOSEST is faster if the compiler knows it will only be dealing
with unsigned dividends.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agopcmcia: move unbind/rebind into dev_pm_ops.complete
Christian Lamparter [Fri, 28 Sep 2012 00:18:53 +0000 (10:18 +1000)]
pcmcia: move unbind/rebind into dev_pm_ops.complete

Move the device rebind procedures for cardbus devices from the pm.resume
into the pm.complete callback.

The reason for moving the code is: "[...] The PM code needs to send
suspend and resume messages to every device in the right order, and it
can't do that if new devices are being added at the same time.  [...]"

However the situation really isn't quite that rigid.  In particular,
adding new children during a resume callback shouldn't cause much of
problem because the children don't need to be resumed anyway (since they
were never suspended).  On the other hand, if you do it you will get a
dev_warn() from the PM core, something like 'parent should not be
sleeping'.

Still, it is considered bad form and should be avoided if possible."

(Alan Stern's full comment about the topic can
be found here: <https://lkml.org/lkml/2012/7/10/254>)

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Greg KH <greg@kroah.com>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agofs/debugsfs: remove unnecessary inode->i_private initialization
Yan Hong [Fri, 28 Sep 2012 00:18:53 +0000 (10:18 +1000)]
fs/debugsfs: remove unnecessary inode->i_private initialization

inode->i_private is promised to be NULL on allocation, no need to set it
explicitly.

Signed-off-by: Yan Hong <clouds.yan@gmail.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoarch/x86/platform/uv: fix incorrect tlb flush all issue
Alex Shi [Fri, 28 Sep 2012 00:18:51 +0000 (10:18 +1000)]
arch/x86/platform/uv: fix incorrect tlb flush all issue

The flush tlb optimization code has logical issue on UV platform.  It
doesn't flush the full range at all, since it simply ignores its 'end'
parameter (and hence also the "all" indicator) in uv_flush_tlb_others()
function.

Cliff's notes:

: I tested the patch on a UV.  It has the effect of either clearing 1 or all
: TLBs in a cpu.  I added some debugging to test for the cases when clearing
: all TLBs is overkill, and in practice it happens very seldom.

Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Tested-by: Cliff Wickman <cpw@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoarch/x86/tools/insn_sanity.c: identify source of messages
Andrew Morton [Fri, 28 Sep 2012 00:18:51 +0000 (10:18 +1000)]
arch/x86/tools/insn_sanity.c: identify source of messages

The kernel build prints:

  Building modules, stage 2.
  TEST    posttest
  MODPOST 3821 modules
  TEST    posttest
Success: decoded and checked 1000000 random instructions with 0 errors (seed:0xaac4bc47)
  CC      arch/x86/boot/a20.o
  CC      arch/x86/boot/cmdline.o
  AS      arch/x86/boot/copy.o
  HOSTCC  arch/x86/boot/mkcpustr
  CC      arch/x86/boot/cpucheck.o
  CC      arch/x86/boot/early_serial_console.o

which is irritating because you don't know what program is proudly
pronouncing its success.

So, as described in "console mode programming user interface guidelines
version 101" which doesn't exist, change this program to identify the
source of its messages.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agox86 numa: don't check if node is NUMA_NO_NODE
Wen Congyang [Fri, 28 Sep 2012 00:18:51 +0000 (10:18 +1000)]
x86 numa: don't check if node is NUMA_NO_NODE

If we aren't debugging per_cpu maps, the cpu's node is stored in per_cpu
variable numa_node.  If `node' is NUMA_NO_NODE, it means the caller wants
to clear the cpu's node.  So we should also call set_cpu_numa_node() in
this case.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoarch/x86/platform/iris/iris.c: register a platform device and a platform driver
Shérab [Fri, 28 Sep 2012 00:18:50 +0000 (10:18 +1000)]
arch/x86/platform/iris/iris.c: register a platform device and a platform driver

This makes the iris driver use the platform API, so it is properly exposed
in /sys.

[akpm@linux-foundation.org: remove commented-out code, add missing space to printk, clean up code layout]
Signed-off-by: Shérab <Sebastien.Hinderer@ens-lyon.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoacpi_memhotplug.c: auto bind the memory device which is hotplugged before the driver...
Wen Congyang [Fri, 28 Sep 2012 00:18:50 +0000 (10:18 +1000)]
acpi_memhotplug.c: auto bind the memory device which is hotplugged before the driver is loaded

If the memory device is hotplugged before the driver is loaded, the user
cannot see this device under the directory /sys/bus/acpi/devices/, and the
user cannot bind it by hand after the driver is loaded.  This patch
introduces a new feature to bind such device when the driver is being
loaded.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Yasuaki ISIMATU <isimatu.yasuaki@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoacpi_memhotplug.c: bind the memory device when the driver is being loaded
Wen Congyang [Fri, 28 Sep 2012 00:18:50 +0000 (10:18 +1000)]
acpi_memhotplug.c: bind the memory device when the driver is being loaded

We had introduced acpi_hotmem_initialized to avoid strange add_memory fail
message.  But the memory device may not be used by the kernel, and the
device should be bound when the driver is being loaded.  Remove
acpi_hotmem_initialized to allow that the device can be bound when the
driver is being loaded.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Yasuaki ISIMATU <isimatu.yasuaki@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoacpi_memhotplug.c: don't allow to eject the memory device if it is being used
Wen Congyang [Fri, 28 Sep 2012 00:18:49 +0000 (10:18 +1000)]
acpi_memhotplug.c: don't allow to eject the memory device if it is being used

We eject the memory device even if it is in use.  It is very dangerous,
and it will cause the kernel to panic.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Yasuaki ISIMATU <isimatu.yasuaki@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoacpi_memhotplug.c: remove memory info from list before freeing it
Wen Congyang [Fri, 28 Sep 2012 00:18:49 +0000 (10:18 +1000)]
acpi_memhotplug.c: remove memory info from list before freeing it

We free info, but we forget to remove it from the list.  It will cause
unexpected problems when we access the list next time.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Yasuaki ISIMATU <isimatu.yasuaki@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoacpi_memhotplug.c: free memory device if acpi_memory_enable_device() failed
Wen Congyang [Fri, 28 Sep 2012 00:18:49 +0000 (10:18 +1000)]
acpi_memhotplug.c: free memory device if acpi_memory_enable_device() failed

If acpi_memory_enable_device() fails, acpi_memory_enable_device() will
return a non-zero value, which means we fail to bind the memory device to
this driver.  So we should free memory device before
acpi_memory_device_add() returns.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Yasuaki ISIMATU <isimatu.yasuaki@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoacpi_memhotplug.c: fix memory leak when memory device is unbound from the module...
Wen Congyang [Fri, 28 Sep 2012 00:18:48 +0000 (10:18 +1000)]
acpi_memhotplug.c: fix memory leak when memory device is unbound from the module acpi_memhotplug

We allocate memory to store acpi_memory_info, so we should free it before
freeing mem_device.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Yasuaki ISIMATU <isimatu.yasuaki@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agocpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved-fix
Andrew Morton [Fri, 28 Sep 2012 00:18:48 +0000 (10:18 +1000)]
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved-fix

make acpi_unmap_lsapic __ref

Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agox86 cpu_hotplug: unmap cpu2node when the cpu is hotremoved
Wen Congyang [Fri, 28 Sep 2012 00:18:48 +0000 (10:18 +1000)]
x86 cpu_hotplug: unmap cpu2node when the cpu is hotremoved

When a cpu is hotplugged, we call acpi_map_cpu2node() in
_acpi_map_lsapic() to store the cpu's node.  But we don't clear the cpu's
node in acpi_unmap_lsapic() when this cpu is hotremoved.  If the node is
also hotremoved, We will get the following messages:

[ 1646.771485] kernel BUG at include/linux/gfp.h:329!
[ 1646.828729] invalid opcode: 0000 [#1] SMP
[ 1646.877872] Modules linked in: ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle bridge stp llc sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables binfmt_misc dm_mirror dm_region_hash dm_log dm_mod vhost_net macvtap macvlan tun uinput iTCO_wdt iTCO_vendor_support coretemp kvm_intel kvm crc32c_intel microcode pcspkr i2c_i801 i2c_core lpc_ich mfd_core ioatdma e1000e i7core_edac edac_core sg acpi_memhotplug igb dca sd_mod crc_t10dif megaraid_sas mptsas mptscsih mptbase scsi_transport_sas scsi_mod
[ 1647.588773] Pid: 3126, comm: init Not tainted 3.6.0-rc3-tangchen-hostbridge+ #13 FUJITSU-SV PRIMEQUEST 1800E/SB
[ 1647.711545] RIP: 0010:[<ffffffff811bc3fd>]  [<ffffffff811bc3fd>] allocate_slab+0x28d/0x300
[ 1647.810492] RSP: 0018:ffff88078a049cf8  EFLAGS: 00010246
[ 1647.874028] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
[ 1647.959339] RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000246
[ 1648.044659] RBP: ffff88078a049d38 R08: 00000000000040d0 R09: 0000000000000001
[ 1648.129953] R10: 0000000000000000 R11: 0000000000000b5f R12: 00000000000052d0
[ 1648.215259] R13: ffff8807c1417300 R14: 0000000000030038 R15: 0000000000000003
[ 1648.300572] FS:  00007fa9b1b44700(0000) GS:ffff8807c3800000(0000) knlGS:0000000000000000
[ 1648.397272] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1648.465985] CR2: 00007fa9b09acca0 CR3: 000000078b855000 CR4: 00000000000007e0
[ 1648.551265] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1648.636565] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1648.721838] Process init (pid: 3126, threadinfo ffff88078a048000, task ffff8807bb6f2650)
[ 1648.818534] Stack:
[ 1648.842548]  ffff8807c39d7fa0 ffffffff000040d0 00000000000000bb 00000000000080d0
[ 1648.931469]  ffff8807c1417300 ffff8807c39d7fa0 ffff8807c1417300 0000000000000001
[ 1649.020410]  ffff88078a049d88 ffffffff811bc4a0 ffff8807c1410c80 0000000000000000
[ 1649.109464] Call Trace:
[ 1649.138713]  [<ffffffff811bc4a0>] new_slab+0x30/0x1b0
[ 1649.199075]  [<ffffffff811bc978>] __slab_alloc+0x358/0x4c0
[ 1649.264683]  [<ffffffff810b71c0>] ? alloc_fair_sched_group+0xd0/0x1b0
[ 1649.341695]  [<ffffffff811be7d4>] kmem_cache_alloc_node_trace+0xb4/0x1e0
[ 1649.421824]  [<ffffffff8109d188>] ? hrtimer_init+0x48/0x100
[ 1649.488414]  [<ffffffff810b71c0>] ? alloc_fair_sched_group+0xd0/0x1b0
[ 1649.565402]  [<ffffffff810b71c0>] alloc_fair_sched_group+0xd0/0x1b0
[ 1649.640297]  [<ffffffff810a8bce>] sched_create_group+0x3e/0x110
[ 1649.711040]  [<ffffffff810bdbcd>] sched_autogroup_create_attach+0x4d/0x180
[ 1649.793260]  [<ffffffff81089614>] sys_setsid+0xd4/0xf0
[ 1649.854694]  [<ffffffff8167a029>] system_call_fastpath+0x16/0x1b
[ 1649.926483] Code: 89 c4 e9 73 fe ff ff 31 c0 89 de 48 c7 c7 45 de 9e 81 44 89 45 c8 e8 22 05 4b 00 85 db 44 8b 45 c8 0f 89 4f ff ff ff 0f 0b eb fe <0f> 0b 90 eb fd 0f 0b eb fe 89 de 48 c7 c7 45 de 9e 81 31 c0 44
[ 1650.161454] RIP  [<ffffffff811bc3fd>] allocate_slab+0x28d/0x300
[ 1650.232348]  RSP <ffff88078a049cf8>
[ 1650.274029] ---[ end trace adf84c90f3fea3e5 ]---

The reason is that: the cpu's node is not NUMA_NO_NODE, we will call
alloc_pages_exact_node() to alloc memory on the node, but the node is
offlined.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agovfs: d_obtain_alias() needs to use "/" as default name.
NeilBrown [Fri, 28 Sep 2012 00:18:47 +0000 (10:18 +1000)]
vfs: d_obtain_alias() needs to use "/" as default name.

NFS appears to use d_obtain_alias() to create the root dentry rather than
d_make_root.  This can cause 'prepend_path()' to complain that the root
has a weird name if an NFS filesystem is lazily unmounted.  e.g.  if
"/mnt" is an NFS mount then

 { cd /mnt; umount -l /mnt ; ls -l /proc/self/cwd; }

will cause a WARN message like
   WARNING: at /home/git/linux/fs/dcache.c:2624 prepend_path+0x1d7/0x1e0()
   ...
   Root dentry has weird name <>

to appear in kernel logs.

So change d_obtain_alias() to use "/" rather than "" as the anonymous
name.

Signed-off-by: NeilBrown <neilb@suse.de>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoselinux: fix sel_netnode_insert() suspicious rcu dereference
Dave Jones [Fri, 28 Sep 2012 00:18:47 +0000 (10:18 +1000)]
selinux: fix sel_netnode_insert() suspicious rcu dereference

===============================
[ INFO: suspicious RCU usage. ]
3.5.0-rc1+ #63 Not tainted
-------------------------------
security/selinux/netnode.c:178 suspicious rcu_dereference_check() usage!

other info that might help us debug this:

rcu_scheduler_active = 1, debug_locks = 0
1 lock held by trinity-child1/8750:
 #0:  (sel_netnode_lock){+.....}, at: [<ffffffff812d8f8a>] sel_netnode_sid+0x16a/0x3e0

stack backtrace:
Pid: 8750, comm: trinity-child1 Not tainted 3.5.0-rc1+ #63
Call Trace:
 [<ffffffff810cec2d>] lockdep_rcu_suspicious+0xfd/0x130
 [<ffffffff812d91d1>] sel_netnode_sid+0x3b1/0x3e0
 [<ffffffff812d8e20>] ? sel_netnode_find+0x1a0/0x1a0
 [<ffffffff812d24a6>] selinux_socket_bind+0xf6/0x2c0
 [<ffffffff810cd1dd>] ? trace_hardirqs_off+0xd/0x10
 [<ffffffff810cdb55>] ? lock_release_holdtime.part.9+0x15/0x1a0
 [<ffffffff81093841>] ? lock_hrtimer_base+0x31/0x60
 [<ffffffff812c9536>] security_socket_bind+0x16/0x20
 [<ffffffff815550ca>] sys_bind+0x7a/0x100
 [<ffffffff816c03d5>] ? sysret_check+0x22/0x5d
 [<ffffffff810d392d>] ? trace_hardirqs_on_caller+0x10d/0x1a0
 [<ffffffff8133b09e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff816c03a9>] system_call_fastpath+0x16/0x1b

This patch below does what Paul McKenney suggested in the previous thread.

Signed-off-by: Dave Jones <davej@redhat.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Eric Paris <eparis@parisplace.org>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoCRIS: Fix I/O macros
Corey Minyard [Fri, 28 Sep 2012 00:18:47 +0000 (10:18 +1000)]
CRIS: Fix I/O macros

The inb/outb macros for CRIS are broken from a number of points of view,
missing () around parameters and they have an unprotected if statement in
them.  This was breaking the compile of IPMI on CRIS and thus I was being
annoyed by build regressions, so I fixed them.

Plus I don't think they would have worked at all, since the data values
were missing "&" and the outsl had a "3" instead of a "4" for the size.
From what I can tell, this stuff is not used at all, so this can't be any
more broken than it was before, anyway.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
12 years agoMerge remote-tracking branch 'signal/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 03:01:39 +0000 (14:01 +1100)]
Merge remote-tracking branch 'signal/for-next'

Conflicts:
arch/alpha/Kconfig
arch/arm/Kconfig
arch/arm/include/asm/thread_info.h
arch/avr32/include/asm/Kbuild
arch/c6x/Kconfig
arch/cris/include/asm/Kbuild
arch/frv/include/asm/Kbuild
arch/h8300/include/asm/Kbuild
arch/ia64/include/asm/Kbuild
arch/m32r/include/asm/Kbuild
arch/m68k/Kconfig
arch/microblaze/include/asm/Kbuild
arch/mn10300/Kconfig
arch/mn10300/include/asm/Kbuild
arch/powerpc/Kconfig
arch/s390/Kconfig
arch/um/kernel/exec.c
arch/x86/Kconfig
arch/x86/kernel/process_32.c
arch/x86/kernel/signal.c
arch/xtensa/include/asm/Kbuild
fs/exec.c

12 years agoMerge remote-tracking branch 'userns/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:57:30 +0000 (13:57 +1100)]
Merge remote-tracking branch 'userns/for-next'

12 years agoMerge remote-tracking branch 'dma-buf/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:55:43 +0000 (13:55 +1100)]
Merge remote-tracking branch 'dma-buf/for-next'

12 years agoMerge remote-tracking branch 'pwm/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:54:00 +0000 (13:54 +1100)]
Merge remote-tracking branch 'pwm/for-next'

12 years agoMerge remote-tracking branch 'kvmtool/master'
Stephen Rothwell [Tue, 9 Oct 2012 02:52:13 +0000 (13:52 +1100)]
Merge remote-tracking branch 'kvmtool/master'

12 years agoMerge remote-tracking branch 'samsung/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:52:05 +0000 (13:52 +1100)]
Merge remote-tracking branch 'samsung/for-next'

Conflicts:
arch/arm/mach-exynos/clock-exynos5.c

12 years agoMerge remote-tracking branch 'renesas/next'
Stephen Rothwell [Tue, 9 Oct 2012 02:50:16 +0000 (13:50 +1100)]
Merge remote-tracking branch 'renesas/next'

Conflicts:
arch/arm/Kconfig

12 years agoMerge remote-tracking branch 'ixp4xx/next'
Stephen Rothwell [Tue, 9 Oct 2012 02:48:20 +0000 (13:48 +1100)]
Merge remote-tracking branch 'ixp4xx/next'

Conflicts:
arch/arm/mach-ixp4xx/common.c
arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h

12 years agoMerge remote-tracking branch 'ep93xx/ep93xx-for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:48:10 +0000 (13:48 +1100)]
Merge remote-tracking branch 'ep93xx/ep93xx-for-next'

12 years agoMerge remote-tracking branch 'arm-soc/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:46:35 +0000 (13:46 +1100)]
Merge remote-tracking branch 'arm-soc/for-next'

12 years agoMerge remote-tracking branch 'remoteproc/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:44:50 +0000 (13:44 +1100)]
Merge remote-tracking branch 'remoteproc/for-next'

12 years agoMerge remote-tracking branch 'vhost/linux-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:44:43 +0000 (13:44 +1100)]
Merge remote-tracking branch 'vhost/linux-next'

Conflicts:
drivers/net/tun.c

12 years agoMerge remote-tracking branch 'writeback/writeback-for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:42:38 +0000 (13:42 +1100)]
Merge remote-tracking branch 'writeback/writeback-for-next'

12 years agoMerge remote-tracking branch 'tmem/linux-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:36:17 +0000 (13:36 +1100)]
Merge remote-tracking branch 'tmem/linux-next'

12 years agoMerge remote-tracking branch 'leds/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:34:06 +0000 (13:34 +1100)]
Merge remote-tracking branch 'leds/for-next'

12 years agoMerge remote-tracking branch 'drivers-x86/linux-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:32:17 +0000 (13:32 +1100)]
Merge remote-tracking branch 'drivers-x86/linux-next'

12 years agoMerge remote-tracking branch 'workqueues/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:32:13 +0000 (13:32 +1100)]
Merge remote-tracking branch 'workqueues/for-next'

12 years agoMerge remote-tracking branch 'xen-two/linux-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:30:17 +0000 (13:30 +1100)]
Merge remote-tracking branch 'xen-two/linux-next'

12 years agoMerge remote-tracking branch 'kvm-ppc/kvm-ppc-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:28:25 +0000 (13:28 +1100)]
Merge remote-tracking branch 'kvm-ppc/kvm-ppc-next'

12 years agoMerge remote-tracking branch 'kmemleak/kmemleak'
Stephen Rothwell [Tue, 9 Oct 2012 02:26:38 +0000 (13:26 +1100)]
Merge remote-tracking branch 'kmemleak/kmemleak'

12 years agoMerge remote-tracking branch 'tip/auto-latest'
Stephen Rothwell [Tue, 9 Oct 2012 02:18:55 +0000 (13:18 +1100)]
Merge remote-tracking branch 'tip/auto-latest'

12 years agoMerge remote-tracking branch 'spi-mb/spi-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:17:15 +0000 (13:17 +1100)]
Merge remote-tracking branch 'spi-mb/spi-next'

12 years agoMerge remote-tracking branch 'edac-amd/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:17:03 +0000 (13:17 +1100)]
Merge remote-tracking branch 'edac-amd/for-next'

Conflicts:
Documentation/edac.txt
drivers/edac/amd64_edac.c

12 years agoMerge remote-tracking branch 'edac/linux_next'
Stephen Rothwell [Tue, 9 Oct 2012 02:15:04 +0000 (13:15 +1100)]
Merge remote-tracking branch 'edac/linux_next'

12 years agoMerge remote-tracking branch 'fsnotify/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:13:26 +0000 (13:13 +1100)]
Merge remote-tracking branch 'fsnotify/for-next'

Conflicts:
kernel/audit_tree.c

12 years agoMerge remote-tracking branch 'osd/linux-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:11:11 +0000 (13:11 +1100)]
Merge remote-tracking branch 'osd/linux-next'

12 years agoMerge remote-tracking branch 'vfio/next'
Stephen Rothwell [Tue, 9 Oct 2012 02:09:33 +0000 (13:09 +1100)]
Merge remote-tracking branch 'vfio/next'

12 years agoMerge remote-tracking branch 'watchdog/master'
Stephen Rothwell [Tue, 9 Oct 2012 02:07:50 +0000 (13:07 +1100)]
Merge remote-tracking branch 'watchdog/master'

12 years agoMerge remote-tracking branch 'selinux/master'
Stephen Rothwell [Tue, 9 Oct 2012 02:07:44 +0000 (13:07 +1100)]
Merge remote-tracking branch 'selinux/master'

12 years agoMerge remote-tracking branch 'omap_dss2/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:05:59 +0000 (13:05 +1100)]
Merge remote-tracking branch 'omap_dss2/for-next'

Conflicts:
drivers/video/omap/lcd_ams_delta.c
drivers/video/omap2/displays/panel-taal.c
drivers/video/omap2/dss/dispc.c

12 years agoMerge remote-tracking branch 'fbdev/fbdev-next'
Stephen Rothwell [Tue, 9 Oct 2012 02:04:19 +0000 (13:04 +1100)]
Merge remote-tracking branch 'fbdev/fbdev-next'

Conflicts:
arch/arm/mach-s3c64xx/mach-mini6410.c
arch/arm/mach-s3c64xx/mach-real6410.c
drivers/video/epson1355fb.c
drivers/video/msm/mddi.c
drivers/video/msm/mdp.c
drivers/video/msm/mdp_hw.h

12 years agoMerge remote-tracking branch 'md/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 01:20:29 +0000 (12:20 +1100)]
Merge remote-tracking branch 'md/for-next'

Conflicts:
drivers/md/raid0.c
fs/bio.c

12 years agoMerge remote-tracking branch 'kgdb/kgdb-next'
Stephen Rothwell [Tue, 9 Oct 2012 01:18:25 +0000 (12:18 +1100)]
Merge remote-tracking branch 'kgdb/kgdb-next'

12 years agoMerge remote-tracking branch 'mmc/mmc-next'
Stephen Rothwell [Tue, 9 Oct 2012 01:16:48 +0000 (12:16 +1100)]
Merge remote-tracking branch 'mmc/mmc-next'

Conflicts:
drivers/mmc/host/davinci_mmc.c
drivers/mmc/host/omap.c

12 years agoMerge branch 'quilt/device-mapper'
Stephen Rothwell [Tue, 9 Oct 2012 01:14:51 +0000 (12:14 +1100)]
Merge branch 'quilt/device-mapper'

Conflicts:
drivers/md/dm-thin.c
drivers/md/dm.c

12 years agoMerge remote-tracking branch 'block/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 01:07:50 +0000 (12:07 +1100)]
Merge remote-tracking branch 'block/for-next'

Conflicts:
init/Kconfig

12 years agoMerge remote-tracking branch 'cgroup/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 01:07:42 +0000 (12:07 +1100)]
Merge remote-tracking branch 'cgroup/for-next'

12 years agoMerge remote-tracking branch 'input/next'
Stephen Rothwell [Tue, 9 Oct 2012 01:05:39 +0000 (12:05 +1100)]
Merge remote-tracking branch 'input/next'

12 years agoMerge remote-tracking branch 'modules/modules-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:59:14 +0000 (11:59 +1100)]
Merge remote-tracking branch 'modules/modules-next'

Conflicts:
Makefile
arch/Kconfig
arch/cris/include/asm/Kbuild
arch/h8300/include/asm/Kbuild
arch/m32r/include/asm/Kbuild
arch/x86/Kconfig
arch/x86/um/Kconfig
arch/xtensa/Kconfig
init/Kconfig

12 years agoMerge remote-tracking branch 'sound-asoc/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:57:29 +0000 (11:57 +1100)]
Merge remote-tracking branch 'sound-asoc/for-next'

12 years agoMerge remote-tracking branch 'sound/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:55:47 +0000 (11:55 +1100)]
Merge remote-tracking branch 'sound/for-next'

12 years agoMerge remote-tracking branch 'l2-mtd/master'
Stephen Rothwell [Tue, 9 Oct 2012 00:53:58 +0000 (11:53 +1100)]
Merge remote-tracking branch 'l2-mtd/master'

12 years agoMerge remote-tracking branch 'mtd/master'
Stephen Rothwell [Tue, 9 Oct 2012 00:52:17 +0000 (11:52 +1100)]
Merge remote-tracking branch 'mtd/master'

Conflicts:
MAINTAINERS
arch/arm/configs/bcmring_defconfig
arch/arm/mach-imx/clk-imx51-imx53.c
drivers/mtd/nand/Kconfig
drivers/mtd/nand/bcm_umi_nand.c
drivers/mtd/nand/nand_bcm_umi.h
drivers/mtd/nand/orion_nand.c

12 years agoMerge remote-tracking branch 'bluetooth/master'
Stephen Rothwell [Tue, 9 Oct 2012 00:18:35 +0000 (11:18 +1100)]
Merge remote-tracking branch 'bluetooth/master'

12 years agoMerge remote-tracking branch 'slave-dma/next'
Stephen Rothwell [Tue, 9 Oct 2012 00:16:54 +0000 (11:16 +1100)]
Merge remote-tracking branch 'slave-dma/next'

Conflicts:
drivers/dma/mmp_tdma.c
drivers/mmc/host/davinci_mmc.c
drivers/spi/spi-davinci.c

12 years agoMerge remote-tracking branch 'target-updates/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:14:56 +0000 (11:14 +1100)]
Merge remote-tracking branch 'target-updates/for-next'

12 years agoMerge remote-tracking branch 'scsi/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:13:11 +0000 (11:13 +1100)]
Merge remote-tracking branch 'scsi/for-next'

12 years agoMerge remote-tracking branch 'thermal/next'
Stephen Rothwell [Tue, 9 Oct 2012 00:11:28 +0000 (11:11 +1100)]
Merge remote-tracking branch 'thermal/next'

Conflicts:
drivers/staging/omap-thermal/omap-thermal-common.c
drivers/thermal/thermal_sys.c

12 years agoMerge remote-tracking branch 'cpuidle/cpuidle-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:11:15 +0000 (11:11 +1100)]
Merge remote-tracking branch 'cpuidle/cpuidle-next'

Conflicts:
drivers/cpuidle/coupled.c
include/linux/cpuidle.h

12 years agoMerge remote-tracking branch 'acpi/next'
Stephen Rothwell [Tue, 9 Oct 2012 00:11:03 +0000 (11:11 +1100)]
Merge remote-tracking branch 'acpi/next'

Conflicts:
include/acpi/acpixf.h

12 years agoMerge remote-tracking branch 'kbuild/for-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:08:59 +0000 (11:08 +1100)]
Merge remote-tracking branch 'kbuild/for-next'

12 years agoMerge remote-tracking branch 'v4l-dvb/master'
Stephen Rothwell [Tue, 9 Oct 2012 00:07:13 +0000 (11:07 +1100)]
Merge remote-tracking branch 'v4l-dvb/master'

Conflicts:
arch/arm/mach-davinci/include/mach/da8xx.h

12 years agoMerge remote-tracking branch 'hwmon-staging/hwmon-next'
Stephen Rothwell [Tue, 9 Oct 2012 00:02:29 +0000 (11:02 +1100)]
Merge remote-tracking branch 'hwmon-staging/hwmon-next'

12 years agoMerge branch 'quilt/jdelvare-hwmon'
Stephen Rothwell [Tue, 9 Oct 2012 00:00:52 +0000 (11:00 +1100)]
Merge branch 'quilt/jdelvare-hwmon'

12 years agoMerge remote-tracking branch 'i2c-embedded/i2c-embedded/for-next'
Stephen Rothwell [Mon, 8 Oct 2012 23:59:24 +0000 (10:59 +1100)]
Merge remote-tracking branch 'i2c-embedded/i2c-embedded/for-next'

Conflicts:
drivers/i2c/busses/i2c-omap.c

12 years agoMerge remote-tracking branch 'hid/for-next'
Stephen Rothwell [Mon, 8 Oct 2012 23:59:16 +0000 (10:59 +1100)]
Merge remote-tracking branch 'hid/for-next'

Conflicts:
drivers/hid/hid-multitouch.c

12 years agoMerge remote-tracking branch 'mpc5xxx/next'
Stephen Rothwell [Mon, 8 Oct 2012 23:57:22 +0000 (10:57 +1100)]
Merge remote-tracking branch 'mpc5xxx/next'

12 years agoMerge remote-tracking branch 'v9fs/for-next'
Stephen Rothwell [Mon, 8 Oct 2012 23:55:30 +0000 (10:55 +1100)]
Merge remote-tracking branch 'v9fs/for-next'