Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6ED2EC05027 for ; Tue, 14 Mar 2023 19:01:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230182AbjCNTBw (ORCPT ); Tue, 14 Mar 2023 15:01:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229480AbjCNTBu (ORCPT ); Tue, 14 Mar 2023 15:01:50 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC1AD2117 for ; Tue, 14 Mar 2023 12:01:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678820469; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=FePX2+VFBr01iZwaVbBM1HjdLAtX/eNoAgkcl35m848=; b=f8eQHD2jP15SkHpcdFFCGGRDnXWTh3p7Lgyrccc+r0zjQ3SEntr67xVAO9OJQCDukRrP0i 4D7jxgXZnz7+4Bllhb2XnIzcAzvAYYzLBRktd6JJoxXpQ/8IFvxECPvR+iRKCDdXrLpX0C JohM6qW97XIVjordXMmdoW89lEWjbLk= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-167-cFasFrcQOX2aPTg-iv9Y4g-1; Tue, 14 Mar 2023 15:01:04 -0400 X-MC-Unique: cFasFrcQOX2aPTg-iv9Y4g-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 7B0181014708; Tue, 14 Mar 2023 19:01:03 +0000 (UTC) Received: from tpad.localdomain (ovpn-112-2.gru2.redhat.com [10.97.112.2]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 490C8400F52; Tue, 14 Mar 2023 19:01:03 +0000 (UTC) Received: by tpad.localdomain (Postfix, from userid 1000) id 5B14E4039C28D; Tue, 14 Mar 2023 16:00:44 -0300 (-03) Message-ID: <20230314185951.603655249@redhat.com> User-Agent: quilt/0.67 Date: Tue, 14 Mar 2023 15:59:17 -0300 From: Marcelo Tosatti To: Christoph Lameter Cc: Aaron Tomlin , Frederic Weisbecker , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Russell King , Huacai Chen , Heiko Carstens , x86@kernel.org, Vlastimil Babka , Michal Hocko , Marcelo Tosatti Subject: [PATCH v6 03/12] this_cpu_cmpxchg: S390: switch this_cpu_cmpxchg to locked, add _local function References: <20230314185914.836510860@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Goal is to have vmstat_shepherd to transfer from per-CPU counters to global counters remotely. For this, an atomic this_cpu_cmpxchg is necessary. Following the kernel convention for cmpxchg/cmpxchg_local, add S390's this_cpu_cmpxchg_local. Signed-off-by: Marcelo Tosatti Index: linux-vmstat-remote/arch/s390/include/asm/percpu.h =================================================================== --- linux-vmstat-remote.orig/arch/s390/include/asm/percpu.h +++ linux-vmstat-remote/arch/s390/include/asm/percpu.h @@ -148,6 +148,11 @@ #define this_cpu_cmpxchg_4(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) #define this_cpu_cmpxchg_8(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) +#define this_cpu_cmpxchg_local_1(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) +#define this_cpu_cmpxchg_local_2(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) +#define this_cpu_cmpxchg_local_4(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) +#define this_cpu_cmpxchg_local_8(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) + #define arch_this_cpu_xchg(pcp, nval) \ ({ \ typeof(pcp) *ptr__; \