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| author | Michal Hocko <mhocko@suse.cz> | 2011-07-26 16:08:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-26 16:49:44 -0700 |
| commit | aacb3d17a73f6447c04e4d769391238dcf85568d (patch) | |
| tree | 6f593f5399c72de51dc320476fa8d04e04ae46a0 /fs/exec.c | |
| parent | fb0a685cb95a0267a96153af2f72486f27be5847 (diff) | |
| download | lwn-aacb3d17a73f6447c04e4d769391238dcf85568d.tar.gz lwn-aacb3d17a73f6447c04e4d769391238dcf85568d.zip | |
fs/exec.c: use BUILD_BUG_ON for VM_STACK_FLAGS & VM_STACK_INCOMPLETE_SETUP
Commit a8bef8ff6ea1 ("mm: migration: avoid race between
shift_arg_pages() and rmap_walk() during migration by not migrating
temporary stacks") introduced a BUG_ON() to ensure that VM_STACK_FLAGS
and VM_STACK_INCOMPLETE_SETUP do not overlap. The check is a compile
time one, so BUILD_BUG_ON is more appropriate.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/exec.c b/fs/exec.c index f8fad7fc0e5f..01829a1cb766 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -277,7 +277,7 @@ static int __bprm_mm_init(struct linux_binprm *bprm) * use STACK_TOP because that can depend on attributes which aren't * configured yet. */ - BUG_ON(VM_STACK_FLAGS & VM_STACK_INCOMPLETE_SETUP); + BUILD_BUG_ON(VM_STACK_FLAGS & VM_STACK_INCOMPLETE_SETUP); vma->vm_end = STACK_TOP_MAX; vma->vm_start = vma->vm_end - PAGE_SIZE; vma->vm_flags = VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP; |