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>
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 9be6ec1..79b47cb 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -59,7 +59,7 @@
/* determine if the children should tell inode about their events */
watched = fsnotify_inode_watches_children(inode);
- spin_lock(&dcache_inode_lock);
+ spin_lock(&inode->i_lock);
/* run all of the dentries associated with this inode. Since this is a
* directory, there damn well better only be one item on this list */
list_for_each_entry(alias, &inode->i_dentry, d_alias) {
@@ -82,7 +82,7 @@
}
spin_unlock(&alias->d_lock);
}
- spin_unlock(&dcache_inode_lock);
+ spin_unlock(&inode->i_lock);
}
/* Notify this dentry's parent about a child's events. */