[RFC] arm64: ioremap: add ioremap_cache macro

[yalin wang]

> On Oct 13, 2015, at 23:20, Catalin Marinas <catalin.marinas at arm.com> wrote:
> 
> On Tue, Oct 13, 2015 at 03:23:27PM +0100, Will Deacon wrote:
>> On Tue, Oct 13, 2015 at 03:10:55PM +0100, Catalin Marinas wrote:
>>> On Mon, Oct 12, 2015 at 10:28:18AM +0800, yalin wang wrote:
>>>> Add ioremap_cache macro, because some code will test if this macro
>>>> is defined or not, and will generate a generric version if not defined,
>>>> for example, memremap.c do like this.
>>>> 
>>>> Signed-off-by: yalin wang <yalin.wang2010 at gmail.com>
>>>> ---
>>>> arch/arm64/include/asm/io.h | 1 +
>>>> 1 file changed, 1 insertion(+)
>>>> 
>>>> diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
>>>> index 44be1e0..d6b620c 100644
>>>> --- a/arch/arm64/include/asm/io.h
>>>> +++ b/arch/arm64/include/asm/io.h
>>>> @@ -172,6 +172,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
>>>> #define ioremap_wc(addr, size)		__ioremap((addr), (size), __pgprot(PROT_NORMAL_NC))
>>>> #define ioremap_wt(addr, size)		__ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
>>>> #define iounmap				__iounmap
>>>> +#define ioremap_cache                  ioremap_cache
>>> 
>>> Applied. Thanks.
>> 
>> I'm not sure we want this. See:
>> 
>>  https://lkml.org/lkml/2015/10/9/699
> 
> Thanks Will and Arnd, I missed this. Patch reverted.
> 
i don’t understand why conflict with Dan Williams’ patch.
Dan Williams ’s patch also define ioremap_cache  for arch ia64  & arch sh & arch xtensa ,
i see this :
# git show   92281dee825f
am i miss something?

Thanks