linux-kernel - Re: [PATCH v2 05/15] sched/debug: Use unsigned long for cpu variable to prevent cast errors

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

Date: Wed, 13 Mar 2024 16:02:34 -0400
From: Chris Hyser <chris.hyser@...cle.com>
To: "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
        Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira
 <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Bill Wendling
 <morbo@...gle.com>,
        Justin Stitt <justinstitt@...gle.com>
Cc: Suleiman Souhlal <suleiman@...gle.com>,
        Youssef Esmat <youssefesmat@...gle.com>,
        David Vernet <void@...ifault.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney"
 <paulmck@...nel.org>,
        joseph.salisbury@...onical.com,
        Luca Abeni <luca.abeni@...tannapisa.it>,
        Tommaso Cucinotta <tommaso.cucinotta@...tannapisa.it>,
        Vineeth Pillai <vineeth@...byteword.org>,
        Shuah Khan <skhan@...uxfoundation.org>, Phil Auld <pauld@...hat.com>,
        llvm@...ts.linux.dev
Subject: Re: [PATCH v2 05/15] sched/debug: Use unsigned long for cpu variable
 to prevent cast errors


On 3/12/24 21:24, Joel Fernandes (Google) wrote:
> This avoids compiler errors seen with clang:
>
> In file included from kernel/sched/build_utility.c:72:
> kernel/sched/debug.c:532:47: error: cast to 'void *' from smaller integer
> 	type 'unsigned int' [-Werror,-Wint-to-void-pointer-cast]
> debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &fair_server_runtime_fops);
>
> Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>


Reviewed-by: Chris Hyser <chris.hyser@...cle.com>


> ---
>   kernel/sched/debug.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
> index c6c0120ff105..2590041696bc 100644
> --- a/kernel/sched/debug.c
> +++ b/kernel/sched/debug.c
> @@ -516,7 +516,7 @@ static struct dentry *debugfs_sched;
>   static void debugfs_fair_server_init(void)
>   {
>   	struct dentry *d_fair;
> -	unsigned int cpu;
> +	unsigned long cpu;
>   
>   	d_fair = debugfs_create_dir("fair_server", debugfs_sched);
>   	if (!d_fair)
> @@ -526,7 +526,7 @@ static void debugfs_fair_server_init(void)
>   		struct dentry *d_cpu;
>   		char buf[32];
>   
> -		snprintf(buf, sizeof(buf), "cpu%d", cpu);
> +		snprintf(buf, sizeof(buf), "cpu%lu", cpu);
>   		d_cpu = debugfs_create_dir(buf, d_fair);
>   
>   		debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &fair_server_runtime_fops);