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-rw-r--r--kernel/bpf/ringbuf.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/kernel/bpf/ringbuf.c b/kernel/bpf/ringbuf.c
index 0af88bbc1c15..002f8a5c9e51 100644
--- a/kernel/bpf/ringbuf.c
+++ b/kernel/bpf/ringbuf.c
@@ -213,13 +213,6 @@ static void ringbuf_map_free(struct bpf_map *map)
{
struct bpf_ringbuf_map *rb_map;
- /* at this point bpf_prog->aux->refcnt == 0 and this map->refcnt == 0,
- * so the programs (can be more than one that used this map) were
- * disconnected from events. Wait for outstanding critical sections in
- * these programs to complete
- */
- synchronize_rcu();
-
rb_map = container_of(map, struct bpf_ringbuf_map, map);
bpf_ringbuf_free(rb_map->rb);
kfree(rb_map);
@@ -292,6 +285,7 @@ static __poll_t ringbuf_map_poll(struct bpf_map *map, struct file *filp,
return 0;
}
+static int ringbuf_map_btf_id;
const struct bpf_map_ops ringbuf_map_ops = {
.map_alloc = ringbuf_map_alloc,
.map_free = ringbuf_map_free,
@@ -301,6 +295,8 @@ const struct bpf_map_ops ringbuf_map_ops = {
.map_update_elem = ringbuf_map_update_elem,
.map_delete_elem = ringbuf_map_delete_elem,
.map_get_next_key = ringbuf_map_get_next_key,
+ .map_btf_name = "bpf_ringbuf_map",
+ .map_btf_id = &ringbuf_map_btf_id,
};
/* Given pointer to ring buffer record metadata and struct bpf_ringbuf itself,