[net PATCH 3/3] bpf: devmap, use cond_resched instead of cpu_relax

[John Fastabend]

Be a bit more friendly about waiting for flush bits to complete.
Replace the cpu_relax() with a cond_resched().

Suggested-by: Daniel Borkmann <dan...@iogearbox.net>
Acked-by: Daniel Borkmann <dan...@iogearbox.net>
Signed-off-by: John Fastabend <john.fastab...@gmail.com>
---
 kernel/bpf/devmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c
index ecf9f99..959c9a0 100644
--- a/kernel/bpf/devmap.c
+++ b/kernel/bpf/devmap.c
@@ -159,7 +159,7 @@ static void dev_map_free(struct bpf_map *map)
                unsigned long *bitmap = per_cpu_ptr(dtab->flush_needed, cpu);
 
                while (!bitmap_empty(bitmap, dtab->map.max_entries))
-                       cpu_relax();
+                       cond_resched();
        }
 
        for (i = 0; i < dtab->map.max_entries; i++) {