From: Christoph Hellwig <hch@lst.de>
To: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: Christoph Hellwig <hch@lst.de>,
Jesper Nilsson <jesper.nilsson@axis.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linux-kernel@vger.kernel.org
Subject: Re: dma_zalloc_coherent broken with 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7
Date: Wed, 28 Mar 2018 13:57:03 +0200 [thread overview]
Message-ID: <20180328115703.GA31426@lst.de> (raw)
In-Reply-To: <alpine.LFD.2.21.1803271900390.18934@schleppi>
On Tue, Mar 27, 2018 at 07:04:51PM +0200, Sebastian Ott wrote:
> What was wrong with the old behavior (let the caller decide - the same
> as with memory allocations)?
The old behavior on most (all?) mainstream architectures is that we
always zero the return value. On x86/i386 this goes back to at least
Linux 2.4. So common drivers simply expect this to happen.
prev parent reply other threads:[~2018-03-28 11:57 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-27 8:12 dma_zalloc_coherent broken with 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7 Sebastian Ott
2018-03-27 8:21 ` Geert Uytterhoeven
2018-03-27 8:41 ` Sebastian Ott
2018-03-27 8:51 ` Geert Uytterhoeven
2018-03-27 14:33 ` Christoph Hellwig
2018-03-27 15:24 ` Sebastian Ott
2018-03-27 16:45 ` Christoph Hellwig
2018-03-27 17:04 ` Sebastian Ott
2018-03-28 11:57 ` Christoph Hellwig [this message]
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