linux-kernel - [PATCH v2 ratelimit 10/14] ratelimit: Allow zero ->burst to disable ratelimiting

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Message-Id: <20250418171359.1187719-10-paulmck@kernel.org>
Date: Fri, 18 Apr 2025 10:13:55 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: kernel-team@...a.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kuniyuki Iwashima <kuniyu@...zon.com>,
	Mateusz Guzik <mjguzik@...il.com>,
	Petr Mladek <pmladek@...e.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	John Ogness <john.ogness@...utronix.de>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Jon Pan-Doh <pandoh@...gle.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Karolina Stolarek <karolina.stolarek@...cle.com>,
	"Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH v2 ratelimit 10/14] ratelimit: Allow zero ->burst to disable ratelimiting

If ->burst is zero, rate-limiting will be applied unconditionally.
Therefore, make it low overhead.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Kuniyuki Iwashima <kuniyu@...zon.com>
Cc: Mateusz Guzik <mjguzik@...il.com>
Cc: Petr Mladek <pmladek@...e.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: John Ogness <john.ogness@...utronix.de>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>
---
 lib/ratelimit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ratelimit.c b/lib/ratelimit.c
index 90c9fe57eb422..04f16b8e24575 100644
--- a/lib/ratelimit.c
+++ b/lib/ratelimit.c
@@ -35,7 +35,7 @@ int ___ratelimit(struct ratelimit_state *rs, const char *func)
 	unsigned long flags;
 	int ret;
 
-	if (!interval)
+	if (!interval || !burst)
 		return 1;
 
 	/*
-- 
2.40.1