linux-kernel - Re: [PATCH] scsi: debug: fix type mismatch warning for sg_pcopy_from

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Date:	Wed, 20 May 2015 22:31:45 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Dave Gordon <david.s.gordon@...el.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Akinobu Mita <akinobu.mita@...il.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	jbottomley@...n.com
Subject: Re: [PATCH] scsi: debug: fix type mismatch warning for sg_pcopy_from_buffer

On Wednesday 20 May 2015 12:53:29 Andrew Morton wrote:
> On Tue, 19 May 2015 23:22:39 +0200 Arnd Bergmann <arnd@...db.de> wrote:
> > 
> > I can't decide if this is actually a good idea, or if we should rather drop
> > the sg_pcopy_from_buffer() patch. Maybe someone else sees a better solution.
> 
> Could make do_device_access() call sg_copy_buffer() directly.
> 
> But yes, dropping the sg_pcopy_from/to_buffer changes is reasonable. 
> sg_copy_buffer() is bidirectional and that won't be changing, so
> putting constified wrapeprs around it is kinda fake.

Ok. The part I only saw now is that do_device_access() is the only user
of sg_pcopy_from_buffer(), so if that passes a non-const argument,
there is dropping the patch will be teh best solution.

	Arnd
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