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| author | Vegard Nossum <vegard.nossum@oracle.com> | 2017-02-27 14:30:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-27 18:43:48 -0800 |
| commit | f1f1007644ffc8051a4c11427d58b1967ae7b75a (patch) | |
| tree | e7e590cb1baa494b963d81b967a3f98d3c56f33e /virt | |
| parent | 522b837c672eba9e9fb69f9f52bced0256dc6697 (diff) | |
| download | linux-f1f1007644ffc8051a4c11427d58b1967ae7b75a.tar.gz linux-f1f1007644ffc8051a4c11427d58b1967ae7b75a.tar.xz | |
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 5b0dd4a9b2cb..35f71409d9ee 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -611,7 +611,7 @@ static struct kvm *kvm_create_vm(unsigned long type) return ERR_PTR(-ENOMEM); spin_lock_init(&kvm->mmu_lock); - atomic_inc(¤t->mm->mm_count); + mmgrab(current->mm); kvm->mm = current->mm; kvm_eventfd_init(kvm); mutex_init(&kvm->lock); |