From: Christoph Hellwig <hch@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: Christoph Hellwig <hch@infradead.org>, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 3/3] xfs: optimise CRC updates
Date: Mon, 5 Dec 2016 04:48:40 -0800 [thread overview]
Message-ID: <20161205124840.GC30956@infradead.org> (raw)
In-Reply-To: <20161204221231.GM31101@dastard>
On Mon, Dec 05, 2016 at 09:12:31AM +1100, Dave Chinner wrote:
> I thought the C standard specifically disallowed pointer arithmetic
> on void pointers because they are an incomplete type, even though
> they have the same alignment/representation as a char *.
>
> IIRC, gcc will throw errors on such code if -pedantic-errors or
> -Werror-pointer-arith is specified...
void pointer arithmetics is a GNU extension indeed, but on that
the kernel relies on heavily.
prev parent reply other threads:[~2016-12-05 12:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-01 10:30 [PATCH 0/3] xfs: miscellaneous improvements for 4.10 Dave Chinner
2016-12-01 10:30 ` [PATCH 1/3] xfs: make xfs btree stats less huge Dave Chinner
2016-12-02 13:20 ` Christoph Hellwig
2016-12-05 1:14 ` Dave Chinner
2016-12-05 12:48 ` Christoph Hellwig
2016-12-01 10:30 ` [PATCH 2/3] xfs: use rhashtable to track buffer cache Dave Chinner
2016-12-05 17:04 ` Christoph Hellwig
2016-12-07 6:32 ` Dave Chinner
2016-12-01 10:30 ` [PATCH 3/3] xfs: optimise CRC updates Dave Chinner
2016-12-02 13:22 ` Christoph Hellwig
2016-12-04 22:12 ` Dave Chinner
2016-12-05 12:48 ` Christoph Hellwig [this message]
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