linux-ext4 - Re: [PATCH 02/21] fs: ext4: Use current_fs

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Date:	Thu, 9 Jun 2016 11:45:01 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Deepa Dinamani <deepa.kernel@...il.com>
Cc:	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Al Viro <viro@...iv.linux.org.uk>, y2038@...ts.linaro.org,
	"Theodore Ts'o" <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 02/21] fs: ext4: Use current_fs_time() for inode timestamps

On Wed, Jun 8, 2016 at 10:04 PM, Deepa Dinamani <deepa.kernel@...il.com> wrote:
> CURRENT_TIME_SEC and CURRENT_TIME are not y2038 safe.
> current_fs_time() will be transitioned to be y2038 safe
> along with vfs.
>
> current_fs_time() returns timestamps according to the
> granularities set in the super_block.

All existing users and all the ones in this patch (and the others too,
although I didn't go through them very carefully) really would prefer
just passing in the inode directly, rather than the superblock.

So I don't want to add more users of this broken interface.  It was a
mistake to use the superblock. The fact that the time granularity
exists there is pretty much irrelevant. If every single user wants to
use an inode pointer, then that is what the function should get.

                 Linus
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