linux-kernel - [PATCH bpf-next] bpf: make update_prog_stats always

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Message-Id: <20250618085609.1876111-1-dongml2@chinatelecom.cn>
Date: Wed, 18 Jun 2025 16:56:09 +0800
From: Menglong Dong <menglong8.dong@...il.com>
To: alexei.starovoitov@...il.com
Cc: ast@...nel.org,
	daniel@...earbox.net,
	john.fastabend@...il.com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Menglong Dong <dongml2@...natelecom.cn>
Subject: [PATCH bpf-next] bpf: make update_prog_stats always_inline

The function update_prog_stats() will be called in the bpf trampoline.
Make it always_inline to reduce the overhead.

Signed-off-by: Menglong Dong <dongml2@...natelecom.cn>
---
 kernel/bpf/trampoline.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c
index c4b1a98ff726..134bcfd00b15 100644
--- a/kernel/bpf/trampoline.c
+++ b/kernel/bpf/trampoline.c
@@ -911,8 +911,8 @@ static u64 notrace __bpf_prog_enter_recur(struct bpf_prog *prog, struct bpf_tram
 	return bpf_prog_start_time();
 }
 
-static void notrace update_prog_stats(struct bpf_prog *prog,
-				      u64 start)
+static __always_inline void notrace update_prog_stats(struct bpf_prog *prog,
+						      u64 start)
 {
 	struct bpf_prog_stats *stats;
 
-- 
2.39.5