linux-kernel - Re: [PATCH] sound: Add dependency on DMA

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Date:   Thu, 17 Nov 2016 11:14:52 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     linux-kernel@...r.kernel.org,
        "moderated list:SOUND" <alsa-devel@...a-project.org>,
        arnd@...db.de, Jaroslav Kysela <perex@...ex.cz>
Subject: Re: [PATCH] sound: Add dependency on DMA

On 11/17/2016 11:03 AM, Takashi Iwai wrote:
> On Thu, 17 Nov 2016 19:52:37 +0100,
> Florian Fainelli wrote:
>>
>> Architectures like m32r do not have a proper DMA-API implementation,
>> fixes COMPILE_TEST linking failures for the sounds subsystem.
> 
> What error did you get exactly?
> There are already CONFIG_HAS_DMA dependency in a few places, so I
> wonder what's missing.

They looked like these:

sound/built-in.o: In function `snd_pcm_lib_default_mmap':
(.text+0xbb14): undefined reference to `bad_dma_ops'
sound/built-in.o: In function `snd_pcm_lib_default_mmap':
(.text+0xbb1c): undefined reference to `bad_dma_ops'
sound/built-in.o: In function `snd_pcm_lib_default_mmap':
(.text+0xbb34): undefined reference to `dma_common_mmap'
sound/built-in.o: In function `snd_pcm_lib_default_mmap':
(.text+0xbb34): relocation truncated to fit: R_M32R_26_PCREL_RELA
against undefined symbol `dma_common_mmap'
Makefile:961: recipe for target 'vmlinux' failed

I could probably add an ifdef CONFIG_HAS_DMA just surrounding these
snd_pcm_lib if you think this is more appropriate?
-- 
Florian