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| author |   Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-09-08 14:59:42 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 15:35:28 -0700 |
| commit | 46c043ede4711e8d598b9d63c5616c1fedb0605e (patch) | |
| tree | 8a559930980f59ef24c25b73b91899106f8f0418 /mm/memtest.c | |
| parent | dax: use linear_page_index() (diff) | |
| download | wireguard-linux-46c043ede4711e8d598b9d63c5616c1fedb0605e.tar.xz wireguard-linux-46c043ede4711e8d598b9d63c5616c1fedb0605e.zip | |
mm: take i_mmap_lock in unmap_mapping_range() for DAX
DAX is not so special: we need i_mmap_lock to protect mapping->i_mmap.
__dax_pmd_fault() uses unmap_mapping_range() shoot out zero page from
all mappings. We need to drop i_mmap_lock there to avoid lock deadlock.
Re-aquiring the lock should be fine since we check i_size after the
point.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memtest.c')
0 files changed, 0 insertions, 0 deletions