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author | Zhang Yanfei <zhangyanfei@cn.fujitsu.com> | 2013-04-29 22:07:42 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 22:54:34 (GMT) |
commit | ee5df0570c8af2610b28ab79bd8f8f8195687773 (patch) | |
tree | 988aaab853c133f7dbee9bcb7efdd016ef36f275 | |
parent | 13ba3fcbbe31068b1ee7c39a0b58ecbed03c4d72 (diff) | |
download | linux-fsl-qoriq-ee5df0570c8af2610b28ab79bd8f8f8195687773.tar.xz |
mmap: find_vma: remove the WARN_ON_ONCE(!mm) check
Remove the WARN_ON_ONCE(!mm) check as the comment suggested. Kernel
code calls find_vma only when it is absolutely sure that the mm_struct
arg to it is non-NULL.
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: k80c <k80ck80c@gmail.com>
Cc: Michel Lespinasse <walken@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | mm/mmap.c | 3 |
1 files changed, 0 insertions, 3 deletions
@@ -1935,9 +1935,6 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) { struct vm_area_struct *vma = NULL; - if (WARN_ON_ONCE(!mm)) /* Remove this in linux-3.6 */ - return NULL; - /* Check the cache first. */ /* (Cache hit rate is typically around 35%.) */ vma = ACCESS_ONCE(mm->mmap_cache); |