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authorLinus Torvalds <torvalds@linux-foundation.org>2015-01-09 15:19:03 -0800
committerAl Viro <viro@zeniv.linux.org.uk>2015-01-25 23:16:29 -0500
commit360f54796ed65939093ae373b92ebd5ef3341776 (patch)
treeb89eeed53d0f4ff4ca9b753ca3f239e6fa0be005 /include/linux/lockref.h
parent32426f6653cbfde1ca16aff27a530ee36332f796 (diff)
dcache: let the dentry count go down to zero without taking d_lock
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>
Diffstat (limited to 'include/linux/lockref.h')
-rw-r--r--include/linux/lockref.h3
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 *);