fs: dcache per-inode inode alias locking

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>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 5f0392ef759b..d719e4de8046 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -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)