diff options
| author | Davidlohr Bueso | 2014-12-13 01:54:42 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2014-12-13 21:42:46 +0100 |
| commit | c8475d144abb1e62958cc5ec281d2a9e161c1946 (patch) | |
| tree | 0facd072749929812b47db09726943193a25a401 /mm/memory.c | |
| parent | mm/nommu: share the i_mmap_rwsem (diff) | |
| download | kernel-qcow2-linux-c8475d144abb1e62958cc5ec281d2a9e161c1946.tar.gz kernel-qcow2-linux-c8475d144abb1e62958cc5ec281d2a9e161c1946.tar.xz kernel-qcow2-linux-c8475d144abb1e62958cc5ec281d2a9e161c1946.zip | |
mm/memory.c: share the i_mmap_rwsem
The unmap_mapping_range family of functions do the unmapping of user pages
(ultimately via zap_page_range_single) without touching the actual
interval tree, thus share the lock.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/memory.c b/mm/memory.c index 039fab699a1a..5afdb5b8d4e2 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2377,12 +2377,12 @@ void unmap_mapping_range(struct address_space *mapping, details.last_index = ULONG_MAX; - i_mmap_lock_write(mapping); + i_mmap_lock_read(mapping); if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap))) unmap_mapping_range_tree(&mapping->i_mmap, &details); if (unlikely(!list_empty(&mapping->i_mmap_nonlinear))) unmap_mapping_range_list(&mapping->i_mmap_nonlinear, &details); - i_mmap_unlock_write(mapping); + i_mmap_unlock_read(mapping); } EXPORT_SYMBOL(unmap_mapping_range); |