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authorMichal Hocko <mhocko@suse.cz>2011-06-16 02:08:11 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-06-16 07:03:59 +0400
commit7f81c8890c15a10f5220bebae3b6dfae4961962a (patch)
tree264cb58ffbadb340ce713420a44c00d59fda4e7a /fs/exec.c
parentb0825ee3a8c570df4873ee397fa453e67fdad5d7 (diff)
downloadlinux-7f81c8890c15a10f5220bebae3b6dfae4961962a.tar.xz
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> 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.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 97e0d52d72fd..b54f74f3cd80 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;