Improve code in arc_buf_remove_ref

[zfs.git] / module / zfs / arc.c

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index de86966..df3aeb7 100644 (file)
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -1642,7 +1642,7 @@ int
 arc_buf_remove_ref(arc_buf_t *buf, void* tag)
 {
        arc_buf_hdr_t *hdr = buf->b_hdr;
-       kmutex_t *hash_lock = HDR_LOCK(hdr);
+       kmutex_t *hash_lock = NULL;
        int no_callback = (buf->b_efunc == NULL);
 
        if (hdr->b_state == arc_anon) {
@@ -1651,6 +1651,7 @@ arc_buf_remove_ref(arc_buf_t *buf, void* tag)
                return (no_callback);
        }
 
+       hash_lock = HDR_LOCK(hdr);
        mutex_enter(hash_lock);
        hdr = buf->b_hdr;
        ASSERT3P(hash_lock, ==, HDR_LOCK(hdr));