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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-09-08 14:59:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 15:35:28 -0700 |
| commit | 52a2b53ffde6d6018dfc454fbde34383351fb896 (patch) | |
| tree | 776c011c78152bccfa7e1ce6730b619143534ef5 | |
| parent | 46c043ede4711e8d598b9d63c5616c1fedb0605e (diff) | |
| download | linux-stable-52a2b53ffde6d6018dfc454fbde34383351fb896.tar.gz linux-stable-52a2b53ffde6d6018dfc454fbde34383351fb896.tar.bz2 linux-stable-52a2b53ffde6d6018dfc454fbde34383351fb896.zip | |
mm, dax: use i_mmap_unlock_write() in do_cow_fault()
__dax_fault() takes i_mmap_lock for write. Let's pair it with write
unlock on do_cow_fault() side.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Matthew Wilcox <willy@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 | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/memory.c b/mm/memory.c index ce8e983f3c4d..6cd0b2160401 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3013,9 +3013,9 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma, } else { /* * The fault handler has no page to lock, so it holds - * i_mmap_lock for read to protect against truncate. + * i_mmap_lock for write to protect against truncate. */ - i_mmap_unlock_read(vma->vm_file->f_mapping); + i_mmap_unlock_write(vma->vm_file->f_mapping); } goto uncharge_out; } @@ -3029,9 +3029,9 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma, } else { /* * The fault handler has no page to lock, so it holds - * i_mmap_lock for read to protect against truncate. + * i_mmap_lock for write to protect against truncate. */ - i_mmap_unlock_read(vma->vm_file->f_mapping); + i_mmap_unlock_write(vma->vm_file->f_mapping); } return ret; uncharge_out: |