Re: [PATCH 1/2] ARM: pgtable: add pgprot_writethrough() macro

[Grazvydas Ignotas <notasas@gmail.com>]

On Tue, May 22, 2012 at 10:54 PM, Siarhei Siamashka
<siarhei.siamashka@gmail.com> wrote:
> Needed for remapping pages with write-through cacheable
> attribute. May be useful for framebuffers.

With this series applied, some of my framebuffer programs get over 70%
performance improvement, could we get this patch in? OMAP DSS
maintainer agreed to take the second patch if this can be merged.

> Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
> ---
>  arch/arm/include/asm/pgtable.h |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
> index f66626d..04297fa 100644
> --- a/arch/arm/include/asm/pgtable.h
> +++ b/arch/arm/include/asm/pgtable.h
> @@ -103,6 +103,9 @@ extern pgprot_t             pgprot_kernel;
>  #define pgprot_stronglyordered(prot) \
>         __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_UNCACHED)
>
> +#define pgprot_writethrough(prot) \
> +       __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_WRITETHROUGH)
> +
>  #ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE
>  #define pgprot_dmacoherent(prot) \
>         __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_BUFFERABLE | L_PTE_XN)
> --
> 1.7.3.4
>
> --
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-- 
Gražvydas