Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

The render ring is not alone any more! And the other rings are just as
troublesome...
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Currently, we believe the GPU is idle if just the RENDER ring is idle.
This is obviously wrong if we only using either the BLT or the BSD
rings and so masking genuine hangs.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

In the event that we fail to dispatch the execbuffer, for example if
there is insufficient space on the ring, we were leaving the objects in
an inconsistent state. Notably they were marked as being in the GPU
write domain, but were not added to the ring or any list. This would
lead to inevitable oops:

[ 1010.522940] [drm:i915_gem_do_execbuffer] *ERROR* dispatch failed -16
[ 1010.523055] BUG: unable to handle kernel NULL pointer dereference at
0000000000000088
[ 1010.523097] IP: [<ffffffff8122d006>] i915_gem_flush_ring+0x26/0x140
[ 1010.523120] PGD 14cf2f067 PUD 14ce04067 PMD 0
[ 1010.523140] Oops: 0000 [#1] SMP
[ 1010.523154] last sysfs file: /sys/devices/virtual/vc/vcsa2/uevent
[ 1010.523173] CPU 0
[ 1010.523183] Pid: 716, comm: X Not tainted 2.6.36+ #34 LosLunas
CRB/SandyBridge Platform
[ 1010.523206] RIP: 0010:[<ffffffff8122d006>]  [<ffffffff8122d006>]
i915_gem_flush_ring+0x26/0x140
[ 1010.523233] RSP: 0018:ffff88014bf97cd8  EFLAGS: 00010296
[ 1010.523249] RAX: ffff88014e2d1808 RBX: 0000000000000000 RCX: 0000000000000000
[ 1010.523270] RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
[ 1010.523290] RBP: ffff88014e2d1000 R08: 0000000000000002 R09: 00000000400c645f
[ 1010.523311] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000002
[ 1010.523331] R13: ffff88014e29a000 R14: 00000000000000c8 R15: ffffffff8162eb28
[ 1010.523352] FS:  00007fc62379d700(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000
[ 1010.523375] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1010.523392] CR2: 0000000000000088 CR3: 000000014bf87000 CR4: 00000000000406f0
[ 1010.523412] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1010.523433] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1010.523454] Process X (pid: 716, threadinfo ffff88014bf96000, task ffff88014cc1ee40)
[ 1010.523475] Stack:
[ 1010.523483]  ffff88014d5199c0 0000000000000200 0000000000000000 ffff88014bcc6400
[ 1010.523509] <0> 0000000000000000 0000000000000001 ffff88014e29a000 ffff88014bcc6400
[ 1010.523537] <0> ffffffff8162eb28 ffffffff8122faa8 ffff88014e29a000 ffff88014bcc6400
[ 1010.523568] Call Trace:
[ 1010.523578]  [<ffffffff8122faa8>] ?  i915_gem_object_flush_gpu_write_domain+0x48/0x80
[ 1010.523601]  [<ffffffff8122fb8e>] ?  i915_gem_object_set_to_gtt_domain+0x2e/0xb0
[ 1010.523623]  [<ffffffff8123113b>] ?  i915_gem_set_domain_ioctl+0xdb/0x1f0
[ 1010.523644]  [<ffffffff8120a3f1>] ? drm_ioctl+0x3d1/0x460
[ 1010.523660]  [<ffffffff81231060>] ?  i915_gem_set_domain_ioctl+0x0/0x1f0
[ 1010.523682]  [<ffffffff81092618>] ?  vma_prio_tree_insert+0x28/0x120
[ 1010.523701]  [<ffffffff8109f379>] ? vma_link+0x99/0xf0
[ 1010.523717]  [<ffffffff810a111d>] ? mmap_region+0x1ed/0x4f0
[ 1010.523734]  [<ffffffff810c306f>] ? do_vfs_ioctl+0x9f/0x580
[ 1010.523750]  [<ffffffff810c3599>] ? sys_ioctl+0x49/0x80
[ 1010.523767]  [<ffffffff810022eb>] ?  system_call_fastpath+0x16/0x1b
[ 1010.523785] Code: 00 00 00 00 00 41 57 89 ce 41 56 41 55 41 54 45 89 c4 55 48 89 fd 53 48 89 d3 44 89 c2 48 89 df 4c 8d b3 c8 00 00 00 48 83 ec 18 <ff> 93 88 00 00 00 48 8b 83 c8 00 00 00 4c 8b bd 30 03 00 00 48
[ 1010.523946] RIP  [<ffffffff8122d006>] i915_gem_flush_ring+0x26/0x140
[ 1010.523966]  RSP <ffff88014bf97cd8>
[ 1010.523977] CR2: 0000000000000088
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Preparing the ringbuffer for adding new commands can fail (a timeout
whilst waiting for the GPU to catch up and free some space). So check
for any potential error before overwriting HEAD with new commands, and
propagate that error back to the user where possible.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

The ringbuffer keeps a pointer to the parent device, so we can use that
instead of passing around the pointer on the stack.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

Hi,

while I looked through your changes in drm-intel git tree (as I've got
a pressure for supporting DisplayPort audio), I stumbled on the
possible bug in the commit a9756bb5

	Author: Zhenyu Wang <zhenyuw@linux.intel.com>
	Date:   Sun Sep 19 13:09:06 2010 +0800
	drm/i915: Enable DisplayPort audio

In this commit, you changed the return value of g4x_dp_detect()
to "bit", but it should be "status", I suppose.

[ickle: mea culpa.]
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=31094Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>

usbfs_get_inode() is something completely different...

Bogosity introduced by commit 85fe4025 ("fs: do not assign default
i_ino in new_inode").
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (476 commits)
  vmwgfx: Implement a proper GMR eviction mechanism
  drm/radeon/kms: fix r6xx/7xx 1D tiling CS checker v2
  drm/radeon/kms: properly compute group_size on 6xx/7xx
  drm/radeon/kms: fix 2D tile height alignment in the r600 CS checker
  drm/radeon/kms/evergreen: set the clear state to the blit state
  drm/radeon/kms: don't poll dac load detect.
  gpu: Add Intel GMA500(Poulsbo) Stub Driver
  drm/radeon/kms: MC vram map needs to be >= pci aperture size
  drm/radeon/kms: implement display watermark support for evergreen
  drm/radeon/kms/evergreen: add some additional safe regs v2
  drm/radeon/r600: fix tiling issues in CS checker.
  drm/i915: Move gpu_write_list to per-ring
  drm/i915: Invalidate the to-ring, flush the old-ring when updating domains
  drm/i915/ringbuffer: Write the value passed in to the tail register
  agp/intel: Restore valid PTE bit for Sandybridge after bdd30729
  drm/i915: Fix flushing regression from 9af90d19
  drm/i915/sdvo: Remove unused encoding member
  i915: enable AVI infoframe for intel_hdmi.c [v4]
  drm/i915: Fix current fb blocking for page flip
  drm/i915: IS_IRONLAKE is synonymous with gen == 5
  ...

Fix up conflicts in
 - drivers/gpu/drm/i915/{i915_gem.c, i915/intel_overlay.c}: due to the
   new simplified stack-based kmap_atomic() interface
 - drivers/gpu/drm/vmwgfx/vmwgfx_drv.c: added .llseek entry due to BKL
   removal cleanups.

Merge branches 'upstream/xenfs' and 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen

* 'upstream/xenfs' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen/privcmd: make privcmd visible in domU
  xen/privcmd: move remap_domain_mfn_range() to core xen code and export.
  privcmd: MMAPBATCH: Fix error handling/reporting
  xenbus: export xen_store_interface for xenfs
  xen/privcmd: make sure vma is ours before doing anything to it
  xen/privcmd: print SIGBUS faults
  xen/xenfs: set_page_dirty is supposed to return true if it dirties
  xen/privcmd: create address space to allow writable mmaps
  xen: add privcmd driver
  xen: add variable hypercall caller
  xen: add xen_set_domain_pte()
  xen: add /proc/xen/xsd_{kva,port} to xenfs

* 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: (29 commits)
  xen: include xen/xen.h for definition of xen_initial_domain()
  xen: use host E820 map for dom0
  xen: correctly rebuild mfn list list after migration.
  xen: improvements to VIRQ_DEBUG output
  xen: set up IRQ before binding virq to evtchn
  xen: ensure that all event channels start off bound to VCPU 0
  xen/hvc: only notify if we actually sent something
  xen: don't add extra_pages for RAM after mem_end
  xen: add support for PAT
  xen: make sure xen_max_p2m_pfn is up to date
  xen: limit extra memory to a certain ratio of base
  xen: add extra pages for E820 RAM regions, even if beyond mem_end
  xen: make sure xen_extra_mem_start is beyond all non-RAM e820
  xen: implement "extra" memory to reserve space for pages not present at boot
  xen: Use host-provided E820 map
  xen: don't map missing memory
  xen: defer building p2m mfn structures until kernel is mapped
  xen: add return value to set_phys_to_machine()
  xen: convert p2m to a 3 level tree
  xen: make install_p2mtop_page() static
  ...

Fix up trivial conflict in arch/x86/xen/mmu.c, and fix the use of
'reserve_early()' - in the new memblock world order it is now
'memblock_x86_reserve_range()' instead. Pointed out by Jeremy.

Use Ben's new range manager hooks to implement a manager for
GMRs that manages ids rather than ranges.
This means we can use the standard TTM code for binding, unbinding and
eviction.
Signed-off-by: NThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (52 commits)
  split invalidate_inodes()
  fs: skip I_FREEING inodes in writeback_sb_inodes
  fs: fold invalidate_list into invalidate_inodes
  fs: do not drop inode_lock in dispose_list
  fs: inode split IO and LRU lists
  fs: switch bdev inode bdi's correctly
  fs: fix buffer invalidation in invalidate_list
  fsnotify: use dget_parent
  smbfs: use dget_parent
  exportfs: use dget_parent
  fs: use RCU read side protection in d_validate
  fs: clean up dentry lru modification
  fs: split __shrink_dcache_sb
  fs: improve DCACHE_REFERENCED usage
  fs: use percpu counter for nr_dentry and nr_dentry_unused
  fs: simplify __d_free
  fs: take dcache_lock inside __d_path
  fs: do not assign default i_ino in new_inode
  fs: introduce a per-cpu last_ino allocator
  new helper: ihold()
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (63 commits)
  IB/qib: clean up properly if pci_set_consistent_dma_mask() fails
  IB/qib: Allow driver to load if PCIe AER fails
  IB/qib: Fix uninitialized pointer if CONFIG_PCI_MSI not set
  IB/qib: Fix extra log level in qib_early_err()
  RDMA/cxgb4: Remove unnecessary KERN_<level> use
  RDMA/cxgb3: Remove unnecessary KERN_<level> use
  IB/core: Add link layer type information to sysfs
  IB/mlx4: Add VLAN support for IBoE
  IB/core: Add VLAN support for IBoE
  IB/mlx4: Add support for IBoE
  mlx4_en: Change multicast promiscuous mode to support IBoE
  mlx4_core: Update data structures and constants for IBoE
  mlx4_core: Allow protocol drivers to find corresponding interfaces
  IB/uverbs: Return link layer type to userspace for query port operation
  IB/srp: Sync buffer before posting send
  IB/srp: Use list_first_entry()
  IB/srp: Reduce number of BUSY conditions
  IB/srp: Eliminate two forward declarations
  IB/mlx4: Signal node desc changes to SM by using FW to generate trap 144
  IB: Replace EXTRA_CFLAGS with ccflags-y
  ...

broken by:
drm/radeon/r600: fix tiling issues in CS checker.

v2: only apply it to 1D tiling case.
Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Add idr/ida to kernel-api docbook.
Fix typos and kernel-doc notation.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Acked-by: NTejun Heo <tj@kernel.org>
Cc: Naohiro Aota <naota@elisp.net>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add more wait, wake, and completion interfaces to the device-drivers
docbook.

Fix kernel-doc notation in the added files.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Update Documentation/sysrq.txt magic sysrq keys:

 - 'g' is for kgdb (not arch-specific);
 - add 2 new uses for 'v', remove the Voyager info;
 - add 'y' info (SPARC-64 specific);
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <James.Bottomley@suse.de>
Cc: David Airlie <airlied@linux.ie>
Acked-by: NAlexander Shishkin <virtuoso@slind.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Runtime: fix recursive locking warning of lockdep from rpm_resume()

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (53 commits)
  ACPI: install ACPI table handler before any dynamic tables being loaded
  ACPI / PM: Blacklist another machine that needs acpi_sleep=nonvs
  ACPI: Page based coalescing of I/O remappings optimization
  ACPI: Convert simple locking to RCU based locking
  ACPI: Pre-map 'system event' related register blocks
  ACPI: Add interfaces for ioremapping/iounmapping ACPI registers
  ACPI: Maintain a list of ACPI memory mapped I/O remappings
  ACPI: Fix ioremap size for MMIO reads and writes
  ACPI / Battery: Return -ENODEV for unknown values in get_property()
  ACPI / PM: Fix reference counting of power resources
  Subject: [PATCH] ACPICA: Fix Scope() op in module level code
  ACPI battery: support percentage battery remaining capacity
  ACPI: Make Embedded Controller command timeout delay configurable
  ACPI dock: move some functions to .init.text
  ACPI: thermal: remove unused limit code
  ACPI: static sleep_states[] and acpi_gts_bfs_check
  ACPI: remove dead code
  ACPI: delete dedicated MAINTAINERS entries for ACPI EC and BATTERY drivers
  ACPI: Only processor needs CPU_IDLE
  ACPICA: Update version to 20101013
  ...

* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
  intel_idle: do not use the LAPIC timer for ATOM C2
  intel_idle: add initial Sandy Bridge support
  acpi_idle: delete bogus data from cpuidle_state.power_usage
  intel_idle: delete bogus data from cpuidle_state.power_usage
  intel_idle: simplify test for leave_mm()

* 'sfi-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-sfi-2.6:
  SFI: remove the v0.7 related definitions from sfi.h

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: convert a BUG_ON to BUILD_BUG_ON
  arch/tile: make ptrace() work properly for TILE-Gx COMPAT mode
  arch/tile: support new info op generated by compiler
  arch/tile: minor whitespace/naming changes for string support files
  arch/tile: enable single-step support for TILE-Gx
  arch/tile: parameterize system PLs to support KVM port
  arch/tile: add Tilera's <arch/sim.h> header as an open-source header
  arch/tile: Bomb C99 comments to C89 comments in tile's <arch/sim_def.h>
  arch/tile: prevent corrupt top frame from causing backtracer runaway
  arch/tile: various top-level Makefile cleanups
  arch/tile: change lower bound on syscall error return to -4095
  arch/tile: properly export __mb_incoherent for modules
  arch/tile: provide a definition of MAP_STACK
  kmemleak: add TILE to the list of supported architectures.
  char: hvc: check for error case
  arch/tile: Add a warning if we try to allocate too much vmalloc memory.
  arch/tile: update some comments to clarify register usage.
  arch/tile: use better "punctuation" for VMSPLIT_3_5G and friends
  arch/tile: Use <asm-generic/syscalls.h>
  tile: replace some BUG_ON checks with BUILD_BUG_ON checks

* 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
  NFS: rename nfs.upcall -> nfs.idmap
  NFS: Fix a compile issue in nfs_root

* akpm-incoming-1: (176 commits)
  scripts/checkpatch.pl: add check for declaration of pci_device_id
  scripts/checkpatch.pl: add warnings for static char that could be static const char
  checkpatch: version 0.31
  checkpatch: statement/block context analyser should look at sanitised lines
  checkpatch: handle EXPORT_SYMBOL for DEVICE_ATTR and similar
  checkpatch: clean up structure definition macro handline
  checkpatch: update copyright dates
  checkpatch: Add additional attribute #defines
  checkpatch: check for incorrect permissions
  checkpatch: ensure kconfig help checks only apply when we are adding help
  checkpatch: simplify and consolidate "missing space after" checks
  checkpatch: add check for space after struct, union, and enum
  checkpatch: returning errno typically should be negative
  checkpatch: handle casts better fixing false categorisation of : as binary
  checkpatch: ensure we do not collapse bracketed sections into constants
  checkpatch: suggest cleanpatch and cleanfile when appropriate
  checkpatch: types may sit on a line on their own
  checkpatch: fix regressions in "fix handling of leading spaces"
  div64_u64(): improve precision on 32bit platforms
  lib/parser: cleanup match_number()
  ...

Signed-off-by: NJoe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add warnings for possible missing const uses of
	static char foo[] = "bar"
    that could be
	static const char foo[] = "bar"
and
	static const char *foo[] = {"bar", "baz"}
    that could be
	static const char * const foo[] = {"bar", "baz"}
Signed-off-by: NJoe Perches <joe@perches.com>
Cc: Mike Frysinger <vapier.adi@gmail.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When tracking context to find a block or statement we need to use the
sanitised lines, else perentheses '(' & ')' and braces '{' & '}' can throw
the scanner out.  Also fix up a couple of error outputs which include
those sanitised lines incorrectly.
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Handly definitions similar to below.  The definition macro spits out a
symbol with a prefix.  Add matching of any identifier prefix:

    DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
            ata_scsi_lpm_show, ata_scsi_lpm_put);
    EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Handle definitions such as the following correctly, it is not
a complex statement:

    #define PREALLOC(NAME, START, END, FLAGS) {     \
		    .name = (NAME),                 \
		    .start = (START),               \
		    .end = (END),                   \
		    .flags = (FLAGS)                \
	    },
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

On Wed, 2010-08-11 at 12:35 -0400, Dave Jones wrote:
> I just got this from a patch I merged..
>
> ERROR: need consistent spacing around '*' (ctx:WxV)
> #121: FILE: arch/x86/kernel/cpu/cpufreq/pcc-cpufreq.c:113:
> +static struct pcc_cpu __percpu *pcc_cpu_info;
>                                 ^
> which doesn't seem right.

Perhaps these need to be added to checkpatch.

[apw@canonical.com: added tests]
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Throw an error when a source file has been given execute permissions using
the mode change line present in git diffs.  Also alow the filename
matching to use the "diff" line in addition to the "+++" line, since the
mode change lines appear before any "+++" lines.

[apw@canonical.com: simplified filename logic slightly, added tests]
Cc: Andy Whitcroft <apw@canonical.com>
Acked-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NRabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When checking the length of the help we need to be sure we are seeing the
whole story before erroring.  Firstly we only want to check when adding
the help in the first place.  Second we need to be sure that we are seeing
the end of the entry, nominally when there is no context below or that
context shows the start of the next entry.
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commonise the code for missing spaces after struct, union, and enum such
that they share the same code.  Ensure we cover all the common cases in
each case.  Check against the sanitised line to ensure we do not report on
comments and strings.
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add spacing checks for struct, union, and enum definitions.  Check the
spacing after type and before the equals (=) and open brace ({).

Based on a patch by Joe Perches.

Cc: Joe Perches <joe@perches.com>
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add a (strict mode only) test to check for non-negative returns of what
appear to be errno values as the majority case these should indeed be
negative.
Suggested-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The following incantation is triggering categorisation of its colon (:) as
a binary form, which it is not:

	return foo ? (s8)bar : baz;

Handle casts differently from types in the categoriser, allowing us to
better track (s8)bar as a value and not a declaration.
Reported-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When determining if a return () sequence is a function style bracketing we
simplify the expression one bracket at a time replacing each with a
constant.  However this can trigger a false merge with expressions as
below:

	return (foo)0;

Prevent this false merging.
Reported-by: NHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Signed-off-by: NAndy Whitcroft <apw@canonical.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>