[PATCH] mmap: find_vma: remove the WARN_ON_ONCE(!mm) check

[Zhang Yanfei <zhangyanfei@cn.fujitsu.com>]

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