diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-01-09 15:19:03 -0800 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2016-08-22 12:23:17 -0400 |
| commit | ead2cea23e7a9915c8023fd7cb9ba862da7ca86a (patch) | |
| tree | 09d28d0197425d73b9a976aefcc78d3f27b26ee2 /include/linux/lockref.h | |
| parent | cf4f30b2501fc90f23a935422af07bdddc155678 (diff) | |
| download | lwn-ead2cea23e7a9915c8023fd7cb9ba862da7ca86a.tar.gz lwn-ead2cea23e7a9915c8023fd7cb9ba862da7ca86a.zip | |
dcache: let the dentry count go down to zero without taking d_lock
[ Upstream commit 360f54796ed65939093ae373b92ebd5ef3341776 ]
We can be more aggressive about this, if we are clever and careful. This is subtle.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'include/linux/lockref.h')
| -rw-r--r-- | include/linux/lockref.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/lockref.h b/include/linux/lockref.h index 4bfde0e99ed5..b10b122dd099 100644 --- a/include/linux/lockref.h +++ b/include/linux/lockref.h @@ -28,12 +28,13 @@ struct lockref { #endif struct { spinlock_t lock; - unsigned int count; + int count; }; }; }; extern void lockref_get(struct lockref *); +extern int lockref_put_return(struct lockref *); extern int lockref_get_not_zero(struct lockref *); extern int lockref_get_or_lock(struct lockref *); extern int lockref_put_or_lock(struct lockref *); |