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-rw-r--r--fs/btrfs/ulist.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/btrfs/ulist.c b/fs/btrfs/ulist.c
index 17e68bdc307..2ef59400ad6 100644
--- a/fs/btrfs/ulist.c
+++ b/fs/btrfs/ulist.c
@@ -146,11 +146,20 @@ EXPORT_SYMBOL(ulist_free);
int ulist_add(struct ulist *ulist, u64 val, unsigned long aux,
unsigned long gfp_mask)
{
+ return ulist_add_merge(ulist, val, aux, NULL, gfp_mask);
+}
+
+int ulist_add_merge(struct ulist *ulist, u64 val, unsigned long aux,
+ unsigned long *old_aux, unsigned long gfp_mask)
+{
int i;
for (i = 0; i < ulist->nnodes; ++i) {
- if (ulist->nodes[i].val == val)
+ if (ulist->nodes[i].val == val) {
+ if (old_aux)
+ *old_aux = ulist->nodes[i].aux;
return 0;
+ }
}
if (ulist->nnodes >= ulist->nodes_alloced) {