fs: take dcache_lock inside __d_path
All callers take dcache_lock just around the call to __d_path, so
take the lock into it in preparation of getting rid of dcache_lock.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/dcache.c b/fs/dcache.c
index 83293be..54f93f5 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1994,7 +1994,7 @@
* Returns a pointer into the buffer or an error code if the
* path was too long.
*
- * "buflen" should be positive. Caller holds the dcache_lock.
+ * "buflen" should be positive.
*
* If path is not reachable from the supplied root, then the value of
* root is changed (without modifying refcounts).
@@ -2006,10 +2006,12 @@
int error;
prepend(&res, &buflen, "\0", 1);
+ spin_lock(&dcache_lock);
error = prepend_path(path, root, &res, &buflen);
+ spin_unlock(&dcache_lock);
+
if (error)
return ERR_PTR(error);
-
return res;
}