Subject: + mm-mmap-remove-the-first-mapping-check.patch added to -mm tree
To: b32955@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 21 Apr 2014 15:36:17 -0700
The patch titled
Subject: mm/mmap.c: remove the first mapping check
has been added to the -mm tree. Its filename is
mm-mmap-remove-the-first-mapping-check.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mmap-remove-the-first-mapping-check.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mmap-remove-the-first-mapping-check.patch
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------------------------------------------------------
From: Huang Shijie <b32955@xxxxxxxxxxxxx>
Subject: mm/mmap.c: remove the first mapping check
Remove the first mapping check for vma_link. Move the mutex_lock into the
braces when vma->vm_file is true.
Signed-off-by: Huang Shijie <b32955@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff -puN mm/mmap.c~mm-mmap-remove-the-first-mapping-check mm/mmap.c
--- a/mm/mmap.c~mm-mmap-remove-the-first-mapping-check
+++ a/mm/mmap.c
@@ -643,11 +643,10 @@ static void vma_link(struct mm_struct *m
{
struct address_space *mapping = NULL;
- if (vma->vm_file)
+ if (vma->vm_file) {
mapping = vma->vm_file->f_mapping;
-
- if (mapping)
mutex_lock(&mapping->i_mmap_mutex);
+ }
__vma_link(mm, vma, prev, rb_link, rb_parent);
__vma_link_file(vma);
_
Patches currently in -mm which might be from b32955@xxxxxxxxxxxxx are
mm-mmap-remove-the-first-mapping-check.patch
linux-next.patch
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