[PATCH v3] powerpc: Add an inline function to update POWER8 HID0

[Shreyas B Prabhu]

On 08/05/2015 12:38 PM, Gautham R. Shenoy wrote:
> Section 3.7 of Version 1.2 of the Power8 Processor User's Manual
> prescribes that updates to HID0 be preceded by a SYNC instruction and
> followed by an ISYNC instruction (Page 91).
> 
> Create an inline function name update_power8_hid0() which follows this
> recipe and invoke it from the static split core path.
> 
> Signed-off-by: Gautham R. Shenoy <ego at linux.vnet.ibm.com>

Reviewed-by: Shreyas B. Prabhu <shreyas at linux.vnet.ibm.com>