linux-kernel - Re: [resend2 PATCH] DMA: remove unused support for MEMSET operations

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Date:	Fri, 28 Jun 2013 15:06:59 -0700
From:	Kevin Hilman <khilman@...aro.org>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	Olof Johansson <olof@...om.net>, Dan Williams <djbw@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vinod Koul <vinod.koul@...el.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [resend2 PATCH] DMA: remove unused support for MEMSET operations

Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com> writes:

> Hi,
>
> On Friday, June 28, 2013 09:37:36 AM Olof Johansson wrote:
>> Bartlomiej,
>> 
>> Did you build test on the platforms you changed? You broke dove_defconfig:
>> 
>> In file included from /home/olof/work/next/include/linux/skbuff.h:31:0,
>>                  from /home/olof/work/next/include/linux/if_ether.h:23,
>>                  from /home/olof/work/next/include/net/dsa.h:14,
>>                  from /home/olof/work/next/arch/arm/plat-orion/common.c:21:
>> /home/olof/work/next/arch/arm/plat-orion/common.c: In function
>> 'orion_xor1_init':
>> /home/olof/work/next/arch/arm/plat-orion/common.c:737:14: error:
>> 'DMA_MEMSET' undeclared (first use in this function)
>>   dma_cap_set(DMA_MEMSET, orion_xor1_channels_data[1].cap_mask);
>>               ^
>> /home/olof/work/next/include/linux/dmaengine.h:862:46: note: in
>> definition of macro 'dma_cap_set'
>>  #define dma_cap_set(tx, mask) __dma_cap_set((tx), &(mask))
>>                                               ^
>> /home/olof/work/next/arch/arm/plat-orion/common.c:737:14: note: each
>> undeclared identifier is reported only once for each function it
>> appears in
>>   dma_cap_set(DMA_MEMSET, orion_xor1_channels_data[1].cap_mask);
>>               ^
>> /home/olof/work/next/include/linux/dmaengine.h:862:46: note: in
>> definition of macro 'dma_cap_set'
>>  #define dma_cap_set(tx, mask) __dma_cap_set((tx), &(mask))
>> 
>> 
>> This would also have been found by a "git grep DMA_MEMSET" across the tree.
>> 
>> Andrew, this is coming really late before the merge window, I think it
>> makes sense to hold off to 3.12 if it can't be done without trivial
>> regressions. :(
>
> Sorry for that.  This is an old patch that I ported to current kernels.
> I fixed rejects and verified that it compiles for cases that hit rejects
> but unfortunately I forgot to check for new code related to DMA_MEMSET
> functionality.  Fortunately it seems that the problematic places are in
> plat-orion/common.c and mv_xor.c.  They are fixed in the attached patch.

I just verified that v2 builds now on ARM dove_defconfig and
kirkwood_defconfig (those were 2 that I noticed were broken by this
change.)

Hopefully Andrew can pick up v2.

Thanks,

Kevin

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