[PATCH v5 08/26] powerpc/book3s64/pkeys: Convert execute key support to static key

Aneesh Kumar K.V aneesh.kumar at linux.ibm.com
Mon Jul 6 18:47:54 AEST 2020


On 7/6/20 12:49 PM, Michael Ellerman wrote:
> "Aneesh Kumar K.V" <aneesh.kumar at linux.ibm.com> writes:
>> Convert the bool to a static key like pkey_disabled.
> 
> I'm not convinced this is worth the added complexity of a static key.
> 
> It's not used in any performance critical paths, except for context
> switch, but that's already guarded by:
> 
> 	if (old_thread->iamr != new_thread->iamr)
> 
> Which should always be false on machines which don't have the execute
> key enabled.
> 

Ok will drop the patch.

-aneesh



More information about the Linuxppc-dev mailing list