[PATCH bpf-next v2 2/2] bpf: Use GFP_KERNEL in bpf_event_entry_gen()

[Hou Tao <houtao@xxxxxxxxxxxxxxx>]

From: Hou Tao <houtao1@xxxxxxxxxx>

rcu_read_lock() is no longer held when invoking bpf_event_entry_gen()
which is called by perf_event_fd_array_get_ptr(), so using GFP_KERNEL
instead of GFP_ATOMIC to reduce the possibility of failures due to
out-of-memory.

Acked-by: Yonghong Song <yonghong.song@xxxxxxxxx>
Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
---
 kernel/bpf/arraymap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c
index 6cf47bcb7b83..5c3e4ee7c948 100644
--- a/kernel/bpf/arraymap.c
+++ b/kernel/bpf/arraymap.c
@@ -1197,7 +1197,7 @@ static struct bpf_event_entry *bpf_event_entry_gen(struct file *perf_file,
 {
 	struct bpf_event_entry *ee;
 
-	ee = kzalloc(sizeof(*ee), GFP_ATOMIC);
+	ee = kzalloc(sizeof(*ee), GFP_KERNEL);
 	if (ee) {
 		ee->event = perf_file->private_data;
 		ee->perf_file = perf_file;
-- 
2.29.2