linux-kernel - Re: [PATCH v3 2/2] writeback: Fix false warning in inode_to

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Message-Id: <20250414145120.6051e4f77024660b43b72c8a@linux-foundation.org>
Date: Mon, 14 Apr 2025 14:51:20 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Andreas Gruenbacher <agruenba@...hat.com>
Cc: cgroups@...r.kernel.org, Jan Kara <jack@...e.cz>, Tetsuo Handa
 <penguin-kernel@...ove.sakura.ne.jp>, Rafael Aquini <aquini@...hat.com>,
 gfs2@...ts.linux.dev, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] writeback: Fix false warning in inode_to_wb()

On Sat, 12 Apr 2025 18:39:12 +0200 Andreas Gruenbacher <agruenba@...hat.com> wrote:

> inode_to_wb() is used also for filesystems that don't support cgroup
> writeback. For these filesystems inode->i_wb is stable during the
> lifetime of the inode (it points to bdi->wb) and there's no need to hold
> locks protecting the inode->i_wb dereference. Improve the warning in
> inode_to_wb() to not trigger for these filesystems.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>
> Reviewed-by: Andreas Gruenbacher <agruenba@...hat.com>

Yoo were on the patch delivery path so there should be a
signed-off-by:Andreas somewhere.  I made that change to the mm.git copy
of this patch.