linux-kernel - Re: [PATCH] event/core.c: fix warning format specifier to use %llu instead of %lld for u64 values.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <aJ4DUJD8SXdB3gjn@gmail.com>
Date: Fri, 15 Aug 2025 00:40:00 +0900
From: Ryan Chung <seokwoo.chung130@...il.com>
To: peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
	namhyung@...nel.org
Cc: mark.rutland@....com, alexander.shishkin@...ux.intel.com,
	jolsa@...nel.org, irogers@...gle.com, adrian.hunter@...el.com,
	kan.liang@...ux.intel.com, linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] event/core.c: fix warning format specifier to use %llu
 instead of %lld for u64 values.

Hi all,

Just wondering if there’s any feedback on this patch.

Thanks,
Ryan Chung

On Tue, Jul 29, 2025 at 04:06:03PM +0900, Ryan Chung wrote:
> Updates the perf duration warning to use the unsigned 64‑bit format specifier `%llu` instead of `%lld`, ensuring the format matches the `u64` types.
> 
> No functional change intended.
> 
> Signed-off-by: Ryan Chung <seokwoo.chung130@...il.com>
> ---
>  kernel/events/core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 22fdf0c187cd..b8d7c4a64c44 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -602,7 +602,7 @@ static u64 __report_allowed;
>  static void perf_duration_warn(struct irq_work *w)
>  {
>  	printk_ratelimited(KERN_INFO
> -		"perf: interrupt took too long (%lld > %lld), lowering "
> +		"perf: interrupt took too long (%llu > %llu), lowering "
>  		"kernel.perf_event_max_sample_rate to %d\n",
>  		__report_avg, __report_allowed,
>  		sysctl_perf_event_sample_rate);
> @@ -655,7 +655,7 @@ void perf_sample_event_took(u64 sample_len_ns)
>  	perf_sample_period_ns = NSEC_PER_SEC / sysctl_perf_event_sample_rate;
>  
>  	if (!irq_work_queue(&perf_duration_work)) {
> -		early_printk("perf: interrupt took too long (%lld > %lld), lowering "
> +		early_printk("perf: interrupt took too long (%llu > %llu), lowering "
>  			     "kernel.perf_event_max_sample_rate to %d\n",
>  			     __report_avg, __report_allowed,
>  			     sysctl_perf_event_sample_rate);
> -- 
> 2.43.0
>