Re: [PATCH 4/6] powerpc: asm/io.h: remove split ioread64/iowrite64 helpers

[Michael Ellerman <mpe@ellerman.id.au>]

Arnd Bergmann <arnd@kernel.org> writes:
> From: Arnd Bergmann <arnd@arndb.de>
>
> In previous kernels, there were conflicting definitions for what
> ioread64_lo_hi() and similar functions were supposed to do on
> architectures with native 64-bit MMIO. Based on the actual usage in
> drivers, they are in fact expected to be a pair of 32-bit accesses on
> all architectures, which makes the powerpc64 definition wrong.
>
> Remove it and use the generic implementation instead.
>
> Drivers that want to have split lo/hi or hi/lo accesses on 32-bit
> architectures but can use 64-bit accesses where supported should instead
> use ioread64()/iowrite64() after including the corresponding header file.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  arch/powerpc/include/asm/io.h | 48 -----------------------------------
>  1 file changed, 48 deletions(-)

Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)

cheers