linux-kernel - Re: [PATCH] tracing: Hide __NR_utimensat and _NR_mq

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Message-Id: <20251107020104.fd7f43772d3b0ce5b28474bd@kernel.org>
Date: Fri, 7 Nov 2025 02:01:04 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Linux trace kernel
 <linux-trace-kernel@...r.kernel.org>, Masami Hiramatsu
 <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] tracing: Hide __NR_utimensat and _NR_mq_timedsend when
 not defined

On Tue, 4 Nov 2025 20:53:10 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> From: Steven Rostedt <rostedt@...dmis.org>
> 
> Some architectures (riscv-32) do not define __NR_utimensat and
> _NR_mq_timedsend, and fails to build when they are used.
> 
> Hide them in "ifdef"s.

(I wonder we can expect that other __NR_* also defined on every
architecture?)
Anyway, this looks good to me.

Acked-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Thanks,

> 
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202511031239.ZigDcWzY-lkp@intel.com/
> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
> ---
>  kernel/trace/trace_syscalls.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
> index e07c5a3cc7ab..e96d0063cbcf 100644
> --- a/kernel/trace/trace_syscalls.c
> +++ b/kernel/trace/trace_syscalls.c
> @@ -1072,7 +1072,9 @@ static void check_faultable_syscall(struct trace_event_call *call, int nr)
>  	switch (nr) {
>  	/* user arg 1 with size arg at 2 */
>  	case __NR_write:
> +#ifdef __NR_mq_timedsend
>  	case __NR_mq_timedsend:
> +#endif
>  	case __NR_pwrite64:
>  		sys_data->user_mask = BIT(1);
>  		sys_data->user_arg_size = 2;
> @@ -1186,7 +1188,9 @@ static void check_faultable_syscall(struct trace_event_call *call, int nr)
>  	case __NR_syslog:
>  	case __NR_statx:
>  	case __NR_unlinkat:
> +#ifdef __NR_utimensat
>  	case __NR_utimensat:
> +#endif
>  		sys_data->user_mask = BIT(1);
>  		break;
>  	/* user arg at position 2 */
> -- 
> 2.51.0
> 


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>