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| author | Johannes Weiner <hannes@cmpxchg.org> | 2015-02-10 14:11:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-10 14:30:33 -0800 |
| commit | 74ec67511d36f9c731065b1dae7d9638a3b639d3 (patch) | |
| tree | 97d5265cbe2418404ded25100c2e94ac462ec29d | |
| parent | d9ecee281b8f89da6d3203be62802eda991e37cc (diff) | |
| download | blackbird-obmc-linux-74ec67511d36f9c731065b1dae7d9638a3b639d3.tar.gz blackbird-obmc-linux-74ec67511d36f9c731065b1dae7d9638a3b639d3.zip | |
mm: memory: remove ->vm_file check on shared writable vmas
Shared anonymous mmaps are implemented with shmem files, so all VMAs with
shared writable semantics also have an underlying backing file.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memory.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/mm/memory.c b/mm/memory.c index 9aa09217fe20..0e9b32610655 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2127,9 +2127,7 @@ reuse: balance_dirty_pages_ratelimited(mapping); } - /* file_update_time outside page_lock */ - if (vma->vm_file) - file_update_time(vma->vm_file); + file_update_time(vma->vm_file); } put_page(dirty_page); if (page_mkwrite) { @@ -2971,8 +2969,7 @@ static int do_shared_fault(struct mm_struct *mm, struct vm_area_struct *vma, balance_dirty_pages_ratelimited(mapping); } - /* file_update_time outside page_lock */ - if (vma->vm_file && !vma->vm_ops->page_mkwrite) + if (!vma->vm_ops->page_mkwrite) file_update_time(vma->vm_file); return ret; |
