* [PATCH] mmap: find_vma: remove the WARN_ON_ONCE(!mm) check
@ 2013-03-13 10:05 Zhang Yanfei
0 siblings, 0 replies; only message in thread
From: Zhang Yanfei @ 2013-03-13 10:05 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel@vger.kernel.org
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: Andrew Morton <akpm@linux-foundation.org>
---
mm/mmap.c | 3 ---
1 files changed, 0 insertions(+), 3 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 2664a47..9da664e 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1933,9 +1933,6 @@ 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 = mm->mmap_cache;
--
1.7.1
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2013-03-13 10:05 [PATCH] mmap: find_vma: remove the WARN_ON_ONCE(!mm) check Zhang Yanfei
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