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x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfMPaVkgg4DTioFTvpGPbnh2V3jSuKyUTQcj2Qev10xLKaHJxpWD+QGEVJGvNQqOZjfqZuLjkYef3WHOg6EbI1cbTGIRtfXIjRGERp/EjAhTOmN+nVsud DcbEQm5y5gMK23ZiJv59cjExtEoABzHVyCf8px/WF86L08rRW1Z/gQVYe6Zllfur0Zo7AkrypkuOR/yzPnjOek0rtc2Raj86G6Lcb+WZWN8syCl9x6Oy9YoZ X-CM-Analysis: v=2.3 cv=JLoVTfCb c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=IkcTkHD0fZMA:10 a=xqWC_Br6kY4A:10 a=4_-BN3WEXhEA:10 a=VUJBJC2UJ8kA:10 a=VnNF1IyMAAAA:8 a=DIfcUdl_LKM-nV-XLHMA:9 a=QEXdDO2ut3YA:10 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751343AbeEDHlF (ORCPT ); Fri, 4 May 2018 03:41:05 -0400 Received: from mail-wr0-f194.google.com ([209.85.128.194]:43240 "EHLO mail-wr0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751199AbeEDHlE (ORCPT ); Fri, 4 May 2018 03:41:04 -0400 X-Google-Smtp-Source: AB8JxZprFKoGzqBxGQMWDZ06I0ORPsBsfvkIpR8xrWfw05BuJ36dMTPiYfX3wCQrKzxWy1Q2p2f1Rg== Subject: Re: [PATCH 4.4 15/50] s390/alternative: use a copy of the facility bit mask From: Jiri Slaby To: Greg Kroah-Hartman , linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org, Martin Schwidefsky , David Hildenbrand , Cornelia Huck References: <20180427135655.623669681@linuxfoundation.org> <20180427135656.637526548@linuxfoundation.org> Openpgp: preference=signencrypt Autocrypt: addr=jslaby@suse.cz; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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 >> >> >> [ 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 Date: Mon Mar 20 14:29:50 2017 +0100 s390/facilites: use stfle_fac_list array size for MAX_FACILITY_BIT thanks, -- js suse labs