[PATCH 3/3] powerpc: check CPU_FTR_COHERENT_ICACHE in __flush_dcache_icache for 64bit kernel

[Benjamin Herrenschmidt]

On Tue, 2013-08-06 at 18:23 +0800, Kevin Hao wrote:
> We don't need to flush the dcache and invalidate the icache on the
> CPU which has CPU_FTR_COHERENT_ICACHE set.

Actually we probably need an isync...

Ben.

> Signed-off-by: Kevin Hao <haokexin at gmail.com>
> ---
>  arch/powerpc/kernel/misc_64.S | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
> index a781566..32e78e2 100644
> --- a/arch/powerpc/kernel/misc_64.S
> +++ b/arch/powerpc/kernel/misc_64.S
> @@ -207,6 +207,9 @@ _GLOBAL(flush_inval_dcache_range)
>   *	void __flush_dcache_icache(void *page)
>   */
>  _GLOBAL(__flush_dcache_icache)
> +BEGIN_FTR_SECTION
> +	blr
> +END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
>  /*
>   * Flush the data cache to memory 
>   *