Re: [PATCH v3 01/17] asm-generic: io: implement relaxed accessor macros as conditional wrappers

[Arnd Bergmann]

On Wednesday 24 September 2014 18:17:20 Will Deacon wrote:
> {read,write}{b,w,l,q}_relaxed are implemented by some architectures in
> order to permit memory-mapped I/O accesses with weaker barrier semantics
> than the non-relaxed variants.
> 
> This patch adds wrappers to asm-generic so that drivers can rely on the
> relaxed accessors being available, even if they don't always provide
> weaker ordering guarantees. Since some architectures both include
> asm-generic/io.h and define some relaxed accessors, the definitions here
> are conditional for the time being.
> 
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
> ---
>  include/asm-generic/io.h | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 

Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/