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fs: dcache per-inode inode alias locking

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dcache_inode_lock can be replaced with per-inode locking. Use existing
inode->i_lock for this. This is slightly non-trivial because we sometimes
need to find the inode from the dentry, which requires d_inode to be
stabilised (either with refcount or d_lock).

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin
2011-01-07 17:50:06 +11:00
parent ceb5bdc2d2
commit 873feea09e
9 changed files with 67 additions and 60 deletions
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include/linux/dcache.h
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@@ -191,7 +191,6 @@ struct dentry_operations {
#define DCACHE_OP_REVALIDATE 0x4000
#define DCACHE_OP_DELETE 0x8000
extern spinlock_t dcache_inode_lock;
extern seqlock_t rename_lock;
static inline int dname_external(struct dentry *dentry)