diff options
| author | Chris Mason <chris.mason@fusionio.com> | 2013-09-21 10:44:55 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-09-21 10:44:55 -0400 |
| commit | 07f0e62e7f2533918f28e780ab3cfeea1a63145d (patch) | |
| tree | cb64b7cf275f1a5fd7f121f4f434e77dc6769e37 /include/linux/dcache.h | |
| parent | d7396f07358a7c6e22c238d36d1d85f9d652a414 (diff) | |
| parent | 6e4664525b1db28f8c4e1130957f70a94c19213e (diff) | |
Merge tag 'v3.11' into for-linus
Linux 3.11
Diffstat (limited to 'include/linux/dcache.h')
| -rw-r--r-- | include/linux/dcache.h | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h index 4a12532da8c4..efdc94434c30 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -9,6 +9,7 @@ #include <linux/seqlock.h> #include <linux/cache.h> #include <linux/rcupdate.h> +#include <linux/lockref.h> struct nameidata; struct path; @@ -100,6 +101,8 @@ extern unsigned int full_name_hash(const unsigned char *, unsigned int); # endif #endif +#define d_lock d_lockref.lock + struct dentry { /* RCU lookup touched fields */ unsigned int d_flags; /* protected by d_lock */ @@ -112,8 +115,7 @@ struct dentry { unsigned char d_iname[DNAME_INLINE_LEN]; /* small names */ /* Ref lookup also touches following */ - unsigned int d_count; /* protected by d_lock */ - spinlock_t d_lock; /* per dentry lock */ + struct lockref d_lockref; /* per-dentry lock and refcount */ const struct dentry_operations *d_op; struct super_block *d_sb; /* The root of the dentry tree */ unsigned long d_time; /* used by d_revalidate */ @@ -318,7 +320,7 @@ static inline int __d_rcu_to_refcount(struct dentry *dentry, unsigned seq) assert_spin_locked(&dentry->d_lock); if (!read_seqcount_retry(&dentry->d_seq, seq)) { ret = 1; - dentry->d_count++; + dentry->d_lockref.count++; } return ret; @@ -326,7 +328,7 @@ static inline int __d_rcu_to_refcount(struct dentry *dentry, unsigned seq) static inline unsigned d_count(const struct dentry *dentry) { - return dentry->d_count; + return dentry->d_lockref.count; } /* validate "insecure" dentry pointer */ @@ -357,17 +359,14 @@ extern char *dentry_path(struct dentry *, char *, int); static inline struct dentry *dget_dlock(struct dentry *dentry) { if (dentry) - dentry->d_count++; + dentry->d_lockref.count++; return dentry; } static inline struct dentry *dget(struct dentry *dentry) { - if (dentry) { - spin_lock(&dentry->d_lock); - dget_dlock(dentry); - spin_unlock(&dentry->d_lock); - } + if (dentry) + lockref_get(&dentry->d_lockref); return dentry; } |