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| author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 00:25:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:06 -0700 |
| commit | a90b9c05df3c1e58eaedc28795d0f5abd896c098 (patch) | |
| tree | bc9c1233bad94175abca731daa9120151e0d9c7e | |
| parent | 13e83599d282ddfd544600df9db5ab343ac4662f (diff) | |
| download | linux-3.10-a90b9c05df3c1e58eaedc28795d0f5abd896c098.tar.gz linux-3.10-a90b9c05df3c1e58eaedc28795d0f5abd896c098.tar.bz2 linux-3.10-a90b9c05df3c1e58eaedc28795d0f5abd896c098.zip | |
[PATCH] lockdep: annotate dcache
Teach special (recursive) locking code to the lock validator. Has no effect
on non-lockdep kernels.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | fs/dcache.c | 4 | ||||
| -rw-r--r-- | include/linux/dcache.h | 12 |
2 files changed, 14 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index bec4de176c8..1b4a3a34ec5 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1339,10 +1339,10 @@ void d_move(struct dentry * dentry, struct dentry * target) */ if (target < dentry) { spin_lock(&target->d_lock); - spin_lock(&dentry->d_lock); + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); } else { spin_lock(&dentry->d_lock); - spin_lock(&target->d_lock); + spin_lock_nested(&target->d_lock, DENTRY_D_LOCK_NESTED); } /* Move the dentry to the target hash queue, if on different bucket */ diff --git a/include/linux/dcache.h b/include/linux/dcache.h index 0dd1610a94a..471781ffeab 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -114,6 +114,18 @@ struct dentry { unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */ }; +/* + * dentry->d_lock spinlock nesting subclasses: + * + * 0: normal + * 1: nested + */ +enum dentry_d_lock_class +{ + DENTRY_D_LOCK_NORMAL, /* implicitly used by plain spin_lock() APIs. */ + DENTRY_D_LOCK_NESTED +}; + struct dentry_operations { int (*d_revalidate)(struct dentry *, struct nameidata *); int (*d_hash) (struct dentry *, struct qstr *); |