Re: [PATCH 4/9] x86, pkeys: override pkey when moving away from PROT_EXEC

[Dave Hansen]

On 04/06/2018 05:09 PM, Ram Pai wrote:
>> -	/*
>> -	 * Look for a protection-key-drive execute-only mapping
>> -	 * which is now being given permissions that are not
>> -	 * execute-only.  Move it back to the default pkey.
>> -	 */
>> -	if (vma_is_pkey_exec_only(vma) &&
>> -	    (prot & (PROT_READ|PROT_WRITE))) {
>> -		return 0;
>> -	}
>> +
> Dave,
> 	this can be simply:
> 
> 	if ((vma_is_pkey_exec_only(vma) && (prot != PROT_EXEC))
> 		return ARCH_DEFAULT_PKEY;

Yes, but we're removing that code entirely. :)