linux-kernel - Re: [PATCH 2/2] vfs: support statx(..., NULL, AT_EMPTY

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Message-ID: <e40b8edeea1d3747fe79a4f9f932ea4a8d891db0.camel@xry111.site>
Date: Thu, 04 Jul 2024 02:48:40 +0800
From: Xi Ruoyao <xry111@...111.site>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Christian Brauner <brauner@...nel.org>, libc-alpha@...rceware.org, 
 "Andreas K. Huettel"
	 <dilfridge@...too.org>, Arnd Bergmann <arnd@...db.de>, Huacai Chen
	 <chenhuacai@...nel.org>, Mateusz Guzik <mjguzik@...il.com>, Alexander Viro
	 <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>, 
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	io-uring@...r.kernel.org, Jens Axboe <axboe@...nel.dk>, 
	loongarch@...ts.linux.dev
Subject: Re: [PATCH 2/2] vfs: support statx(..., NULL, AT_EMPTY_PATH, ...)

On Wed, 2024-07-03 at 10:54 -0700, Linus Torvalds wrote:
> On Wed, 3 Jul 2024 at 10:40, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> > 
> > Oh wow. Shows just *how* long ago that was - and how long ago I
> > looked
> > at 32-bit code. Because clearly, I was wrong.
> 
> Ok, so clearly any *new* 32-bit architecture should use 'struct statx'
> as 'struct stat', and at least avoid the conversion pain.
> 
> Of course, if using <asm-generic/stat.h> like loongarch does, that is
> very much not what happens. You get those old models with just 'long'.

Fortunately LoongArch ILP32 ABI is not finalized yet (there's no 32-bit
kernel and 64-bit kernel does not support 32-bit userspace yet) so we
can still make it happen to use struct statx as (userspace) struct
stat...


-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University