linux-kernel - Re: [PATCH 01/16] ashmem: switch to ->read

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Date:   Fri, 1 Sep 2017 12:20:34 +0200
From:   Christoph Hellwig <hch@....de>
To:     Al Viro <viro@...IV.linux.org.uk>
Cc:     Christoph Hellwig <hch@....de>, arve@...roid.com,
        riandrews@...roid.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/16] ashmem: switch to ->read_iter

On Wed, Aug 30, 2017 at 04:28:55PM +0100, Al Viro wrote:
> On Wed, Aug 30, 2017 at 04:59:52PM +0200, Christoph Hellwig wrote:
> > And use the proper VFS helper for using the backing file.
> 
> Actually, I wonder if that update of ->f_pos of the underlying file is
> correct.  That's unrelated to this patch, but might be worth sorting
> out while we are at it.

Sure, I'll add that.  If ashmem_mutex wasn't a global lock we could
just as easily keep it locked, but I'll leave that to the android
folks.