[PATCH] arch/powerpc/64: Avoid isync in flush_dcache_range

[Aneesh Kumar K.V]

On 3/20/20 8:35 PM, Segher Boessenkool wrote:
> On Fri, Mar 20, 2020 at 04:02:42PM +0530, Aneesh Kumar K.V wrote:
>> As per ISA and isync is only needed on instruction cache
>> block invalidate. Remove the same from dcache invalidate.
> 
> Is that true on older CPUs?
> 

That is what I found by checking with hardware team. One thing i was not 
able to get full confirmation about was the usage of 'sync' before 'dcbf'.

-aneesh