Re: Help with compiler warning

[Benny Halevy <bhalevy@panasas.com>]

On Aug. 24, 2008, 18:29 +0300, Benny Halevy <bhalevy@panasas.com> wrote:
> On Aug. 22, 2008, 4:36 +0300, Larry Finger <Larry.Finger@lwfinger.net> wrote:
>> In drivers/pcmcia/cardbus.c, the following statement
>>
>>          memcpy_fromio(ptr, s->cb_cis_virt + addr, len);
>>
>> generates the warning
>>
>>    CC [M]  drivers/pcmcia/cardbus.o
>> include/asm/io_32.h: In function ‘memcpy_fromio’:
>> include/asm/io_32.h:151: warning: passing argument 2 of ‘__memcpy’ 
>> discards qualifiers from pointer target type
>>
>> s->cb_cis_virt is "void __iomem" and addr is uint.
>>
>> What cast does argument 2 need to silence the warning?
> 
> memcpy_fromio takes a (const volatile void __iomem *) for the 
> src address.

So the culprit could be the volatile qualifier...

> 
> Benny
> 
>> Thanks,
>>
>> Larry
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