Re: [Outreachy kernel] [PATCH] staging: iio: adc: Replace mlock with driver private lock

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On 03/13/2017 09:51 PM, Jonathan Cameron wrote:
[...]
>>> Gargi,
>>>
>>> Please insert the new lock above the __cacheline_aligned struct
>>> member.
>>
>> I will do that, but is there any reason why the lock should be above
>> ____cacheline_aligned struct member?
> Yes.  It's in fact very important that nothing comes after that.
> 
> Will leave the why as an exercise for the reader.   I'll give the
> hit of spi drivers that do DMA...


One hint though, the answer is somewhere in Documentation/DMA-API.txt

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