On 05/04/2018, 09:37 AM, Jiri Slaby wrote:
On 04/27/2018, 03:58 PM, Greg Kroah-Hartman wrote:
4.4-stable review patch. If anyone has any objections, please let me know.
From: Martin Schwidefsky schwidefsky@de.ibm.com
[ Upstream commit cf1489984641369611556bf00c48f945c77bcf02 ]
To be able to switch off specific CPU alternatives with kernel parameters make a copy of the facility bit mask provided by STFLE and use the copy for the decision to apply an alternative.
...
--- a/arch/s390/include/asm/facility.h +++ b/arch/s390/include/asm/facility.h @@ -13,6 +13,24 @@ #define MAX_FACILITY_BIT (256*8) /* stfle_fac_list has 256 bytes */
I wonder if the below (plus __test_facility) is correct in 4.4, given MAX_FACILITY_BIT is defined as such and not as sizeof(stfle_fac_list * 8) as in upstream?
IOW, we should include this 4.12-commit in 4.4 too: commit 6f5165e864d240d15675cc2fb5a369d57e1f60d0 Author: Heiko Carstens heiko.carstens@de.ibm.com Date: Mon Mar 20 14:29:50 2017 +0100
s390/facilites: use stfle_fac_list array size for MAX_FACILITY_BIT
thanks,