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| author | Mark Brown <broonie@kernel.org> | 2017-01-24 16:24:18 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-01-24 16:24:18 +0000 |
| commit | dbbc21bbf2c640dd148903e82f752c2f269fc58a (patch) | |
| tree | e85f5b686774e2fbae6387f94bf44c4076c49046 /include/linux/rmap.h | |
| parent | f6fa11a35c548a516a41ce1669d0dbcdaabb267f (diff) | |
| parent | 7ce7d89f48834cefece7804d38fc5d85382edf77 (diff) | |
Merge tag 'v4.10-rc1' into asoc-intel
Linux 4.10-rc1
Diffstat (limited to 'include/linux/rmap.h')
| -rw-r--r-- | include/linux/rmap.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h index b46bb5620a76..15321fb1df6b 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -137,11 +137,19 @@ static inline void anon_vma_unlock_read(struct anon_vma *anon_vma) * anon_vma helper functions. */ void anon_vma_init(void); /* create anon_vma_cachep */ -int anon_vma_prepare(struct vm_area_struct *); +int __anon_vma_prepare(struct vm_area_struct *); void unlink_anon_vmas(struct vm_area_struct *); int anon_vma_clone(struct vm_area_struct *, struct vm_area_struct *); int anon_vma_fork(struct vm_area_struct *, struct vm_area_struct *); +static inline int anon_vma_prepare(struct vm_area_struct *vma) +{ + if (likely(vma->anon_vma)) + return 0; + + return __anon_vma_prepare(vma); +} + static inline void anon_vma_merge(struct vm_area_struct *vma, struct vm_area_struct *next) { |