linux-kernel - Re: [PATCH 1/1] ALSA: add dummy function to support shared mmap in nommu Blackfin arch (v2)

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Date:	Wed, 3 Sep 2008 16:35:32 +0800
From:	"Bryan Wu" <cooloney@...nel.org>
To:	"Mike Frysinger" <vapier.adi@...il.com>
Cc:	tiwai@...e.de, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org, "Cliff Cai" <cliff.cai@...log.com>
Subject: Re: [PATCH 1/1] ALSA: add dummy function to support shared mmap in nommu Blackfin arch (v2)

On Tue, Sep 2, 2008 at 9:37 PM, Mike Frysinger <vapier.adi@...il.com> wrote:
> On Tue, Sep 2, 2008 at 5:58 AM, Bryan Wu wrote:
>> From: Cliff Cai <cliff.cai@...log.com>
>>
>> v1-v2:
>>  - only adding this dummy function in nommu arch
>>
>> Signed-off-by: Cliff Cai <cliff.cai@...log.com>
>> Signed-off-by: Bryan Wu <cooloney@...nel.org>
>> ---
>>  sound/core/pcm_native.c |   14 ++++++++++++++
>>  1 files changed, 14 insertions(+), 0 deletions(-)
>>
>> diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
>> index c49b9d9..1e88cde 100644
>> --- a/sound/core/pcm_native.c
>> +++ b/sound/core/pcm_native.c
>> @@ -3391,6 +3391,14 @@ out:
>>  }
>>  #endif /* CONFIG_SND_SUPPORT_OLD_API */
>>
>> +#ifndef CONFIG_MMU
>> +unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
>> +                                     unsigned long len, unsigned long pgoff, unsigned long flags)
>> +{
>> +       return 0;
>> +}
>> +#endif
>
> if you had:
> #else
> # define dummy_get_unmapped_area NULL
> #endif
> then you could avoid #ifdef in the rest of the file ...
> -mike
>

Right, I will refresh this patch.

-Bryan
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