linux-kernel - Re: [PATCH 09/12] tools/nolibc: use a custom struct timespec

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Message-Id: <9c8025ad-8c47-470d-89fa-81a19664ba24@app.fastmail.com>
Date: Thu, 30 Oct 2025 15:46:21 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: Thomas Weißschuh <linux@...ssschuh.net>,
 "Willy Tarreau" <w@....eu>, shuah <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 09/12] tools/nolibc: use a custom struct timespec

On Wed, Oct 29, 2025, at 17:02, Thomas Weißschuh wrote:
> 
> +struct timespec {
> +	time_t	tv_sec;
> +	long	tv_nsec;
> +};
> +#define _STRUCT_TIMESPEC
> +
> +#include <linux/time.h>

Unfortunately this is not the definition we want on big-endian
systems because it puts the tv_nsec field in the wrong place.

You can either uses the simple (non-POSIX) __kernel_timespec
definition in nolibc with a 64-bit tv_nsec, or copy the more
complicated definition with explicit padding that is used
in musl and glibc.

      Arnd