diff options
author | Vegard Nossum <vegard.nossum@oracle.com> | 2017-02-08 10:44:11 +1100 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2017-02-09 17:01:38 +1100 |
commit | 4b79e511db38140df4593725f2181b2901f80108 (patch) | |
tree | 2fa75ee0b3d16b33bbd4d1388922c0b91a662c81 /mm/mmu_context.c | |
parent | 9322bf3263614b1ed65069c3a0e8cd60f62d5647 (diff) |
mm: add new mmgrab() helper
Apart from adding the helper function itself, the rest of the kernel is
converted mechanically using:
git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)->mm_count);/mmgrab\(\1\);/'
git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)\.mm_count);/mmgrab\(\&\1\);/'
This is needed for a later patch that hooks into the helper, but might be
a worthwhile cleanup on its own.
(Michal Hocko provided most of the kerneldoc comment.)
Link: http://lkml.kernel.org/r/20161218123229.22952-1-vegard.nossum@oracle.com
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mmu_context.c')
-rw-r--r-- | mm/mmu_context.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mmu_context.c b/mm/mmu_context.c index 6f4d27c5bb32..daf67bb02b4a 100644 --- a/mm/mmu_context.c +++ b/mm/mmu_context.c @@ -25,7 +25,7 @@ void use_mm(struct mm_struct *mm) task_lock(tsk); active_mm = tsk->active_mm; if (active_mm != mm) { - atomic_inc(&mm->mm_count); + mmgrab(mm); tsk->active_mm = mm; } tsk->mm = mm; |