linux-kernel - Re: [PATCH v2 2/5] tools/nolibc: Add statx() and make stat() rely on statx() when available

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Date:   Thu, 9 Feb 2023 10:06:28 +0800
From:   Feiyang Chen <chris.chenfeiyang@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Willy Tarreau <w@....eu>, "Paul E. McKenney" <paulmck@...nel.org>,
        Feiyang Chen <chenfeiyang@...ngson.cn>,
        Huacai Chen <chenhuacai@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/5] tools/nolibc: Add statx() and make stat() rely on
 statx() when available

On Wed, 8 Feb 2023 at 18:39, Arnd Bergmann <arnd@...db.de> wrote:
>
> On Wed, Feb 8, 2023, at 11:17, chris.chenfeiyang@...il.com wrote:
> > From: Feiyang Chen <chenfeiyang@...ngson.cn>
> >
> > loongarch and riscv32 only have statx(). arc, hexagon, nios2 and
> > openrisc have statx() and stat64() but not stat() or newstat().
> > Add statx() and make stat() rely on statx() to make them happy.
>
> > +#ifdef __NR_statx
> > +static __attribute__((unused))
> > +int sys_stat(const char *path, struct stat *buf)
> > +{
>
> The actual #ifdef check here does what I had suggested first, using
> statx() for all architectures, rather than what you describe in the
> changelog. I think you should keep the check from the first version,
> testing for __NR_stat/__NR_newfstatat and keep the changelog text
> here. Also please add something about the possibility of using statx()
> everywhere in the future.
>

Hi, Arnd,

OK, I will keep the check from the first version and mention that we
may use statx() everywhere.

Thanks,
Feiyang

>       Arnd