FS-Cache: Check that there are no read ops when cookie relinquished
Check that the netfs isn't trying to relinquish a cookie that still has read
operations in progress upon it. If there are, then give log a warning and BUG.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index 9905350..0666996 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -452,6 +452,14 @@
_debug("RELEASE OBJ%x", object->debug_id);
+ if (atomic_read(&object->n_reads)) {
+ spin_unlock(&cookie->lock);
+ printk(KERN_ERR "FS-Cache:"
+ " Cookie '%s' still has %d outstanding reads\n",
+ cookie->def->name, atomic_read(&object->n_reads));
+ BUG();
+ }
+
/* detach each cache object from the object cookie */
spin_lock(&object->lock);
hlist_del_init(&object->cookie_link);