[PATCH] powerpc: use the generic dma coherent remap allocator

[Christophe Leroy]

Le 14/08/2019 à 15:22, Christoph Hellwig a écrit :
> This switches to using common code for the DMA allocations, including
> potential use of the CMA allocator if configured.
> 
> Switching to the generic code enables DMA allocations from atomic
> context, which is required by the DMA API documentation, and also
> adds various other minor features drivers start relying upon.  It
> also makes sure we have on tested code base for all architectures
> that require uncached pte bits for coherent DMA allocations.
> 
> Another advantage is that consistent memory allocations now share
> the general vmalloc pool instead of needing an explicit careout
> from it.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Tested-by: Christophe Leroy <christophe.leroy at c-s.fr> # tested on 8xx

> ---
>   arch/powerpc/Kconfig                         |  12 -
>   arch/powerpc/include/asm/book3s/32/pgtable.h |  12 +-
>   arch/powerpc/include/asm/nohash/32/pgtable.h |  12 +-
>   arch/powerpc/mm/dma-noncoherent.c            | 318 +------------------
>   arch/powerpc/mm/mem.c                        |   4 -
>   arch/powerpc/mm/ptdump/ptdump.c              |   9 -
>   arch/powerpc/platforms/Kconfig.cputype       |   2 +
>   7 files changed, 17 insertions(+), 352 deletions(-)
>