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/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index 0310b16..6d80ecc 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -175,7 +175,7 @@
struct list_head *p;
struct dentry *dentry = NULL;
- spin_lock(&dcache_inode_lock);
+ spin_lock(&inode->i_lock);
list_for_each(p, &inode->i_dentry) {
dentry = list_entry(p, struct dentry, d_alias);
@@ -193,7 +193,7 @@
dentry = NULL;
}
- spin_unlock(&dcache_inode_lock);
+ spin_unlock(&inode->i_lock);
return dentry;
}
