[PATCH] trace: Fix passing zero to 'PTR_ERR' warning

[Wang Qing]

Fix smatch warning.

Signed-off-by: Wang Qing <wangqing@xxxxxxxx>
---
 kernel/trace/bpf_trace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 4517c8b..2cb9c45
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1198,7 +1198,7 @@ static int bpf_btf_printf_prepare(struct btf_ptr *ptr, u32 btf_ptr_size,
 	*btf = bpf_get_btf_vmlinux();
 
 	if (IS_ERR_OR_NULL(*btf))
-		return PTR_ERR(*btf);
+		return PTR_ERR_OR_ZERO(*btf);
 
 	if (ptr->type_id > 0)
 		*btf_id = ptr->type_id;
-- 
2.7.4