linux-ext4 - Re: [PATCH 2/2] libext2fs: use offsetof() from stddef.h

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Message-ID: <YOPGHGlM2an3f8rK@mit.edu>
Date:   Mon, 5 Jul 2021 22:55:24 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Michael Forney <mforney@...rney.org>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: [PATCH 2/2] libext2fs: use offsetof() from stddef.h

On Wed, Apr 14, 2021 at 12:41:28AM -0700, Michael Forney wrote:
> offsetof is a standard C feature available from stddef.h, going
> back all the way to ANSI C.
> 
> Signed-off-by: Michael Forney <mforney@...rney.org>

Thanks, applied.

> Perhaps there is some reason to prefer compiler builtins over libc
> that I'm not seeing?

It's because I pulled container_of from the kernel, and the kernel
header files has to provide offsetof since we don't use the standard
header files --- and it has to work across a bunch of compilers and
architectures.

						- Ted