From nobody Thu Jan 1 07:31:29 2026 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 04CE7C07545 for ; Tue, 24 Oct 2023 14:53:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343546AbjJXOx2 (ORCPT ); Tue, 24 Oct 2023 10:53:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57838 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234602AbjJXOxZ (ORCPT ); Tue, 24 Oct 2023 10:53:25 -0400 Received: from mail-ej1-x62d.google.com (mail-ej1-x62d.google.com [IPv6:2a00:1450:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 89097118 for ; Tue, 24 Oct 2023 07:53:22 -0700 (PDT) Received: by mail-ej1-x62d.google.com with SMTP id a640c23a62f3a-9b96c3b4be4so668571466b.1 for ; Tue, 24 Oct 2023 07:53:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1698159201; x=1698764001; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=KGTgRMl8R0AO37IqkPzGKZezgxHG7P4IDM0GnQ1FQko=; b=fnjTQW5M4mNWpKB7awBz+WlKrUvcbQ6hc1GH1n24HGuwRK2g4WN0gN0kfgl6ZY9H5X KGI43jwozLTvNFy96gyEm3aGQgw009QFlkeAKIVKIbTrAEpKYpvUOp6URitp6ZvfY1TB S7xXniXSrxp6Q4PsI6gfKCwroqdnfbN0NPD/BFwG0kLz/wm58HD/y8XaQ0mMSsxnPnTu 7fewbFzoQdzGxbzkMdLKRHXMKJbleVykNOvYgceCsFBzNU8I0jyB4CtC+uIYLsW0wJM1 D9jsDtfeNfI5XUS9RNiR9KAGwSnh4NV7Ad4JC54tvavV57YbWSfOlUl6DQLTChrmpHv0 vn1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698159201; x=1698764001; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=KGTgRMl8R0AO37IqkPzGKZezgxHG7P4IDM0GnQ1FQko=; b=MJlDkkv9I+V3ZZUq3zFsiM0frZqrlE9MWDKvl2gSUffB21ZiF2c/KZpxgT5pfUXG6o QzjgkOiXuSbo+CUmNtW9nv2XFhZhVdG9XBSm5aILpg5fc8ccXdTHQB7vD/a6uRnRfWU5 OYjwwq2HPHey4czhDKNj+XN9wifREn9Rj9vPAjJlWjEKcbL6tj0B33Uacfgg014A4stS RhPjP3AbbI59ms3mtF3Y2J84yvVG/Q0wuTgxmtQTioFcR2FijA+/HeGZM/ZCyuZzN83r xytVCNZCFvcxWxjv2na05CK4CIGxDNj46YE96+/Zn6SBsMZEME0ngSk5yZjxOFLkRTpU ZKIg== X-Gm-Message-State: AOJu0YxmfQFoyGnkSHUFwcg5yyAFpKCCP99oM7C9SmKu9K+6m96WcvML h1alrfisKeN743CchB7iI7RAah4VMTcmaQ== X-Google-Smtp-Source: AGHT+IGLHpQjp1CaHBmA1Rrw56ih8gPfcRqdgZqas+st0LCfmeV4Z9+ZOd6WnfUp+zdQ6wsjgPmhKg== X-Received: by 2002:a17:907:94c3:b0:9c3:bd63:4245 with SMTP id dn3-20020a17090794c300b009c3bd634245mr8864192ejc.47.1698159200756; Tue, 24 Oct 2023 07:53:20 -0700 (PDT) Received: from localhost.localdomain ([46.248.82.114]) by smtp.gmail.com with ESMTPSA id x9-20020a170906148900b0099d45ed589csm8304952ejc.125.2023.10.24.07.53.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Oct 2023 07:53:20 -0700 (PDT) From: Uros Bizjak To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Uros Bizjak , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Subject: [PATCH] x86/traps: Use current_top_of_stack() helper in traps.c Date: Tue, 24 Oct 2023 16:52:53 +0200 Message-ID: <20231024145309.46756-1-ubizjak@gmail.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Use current_top_of_stack() helper in sync_regs() and vc_switch_off_ist() instead of reading top_of_stack percpu variable explicitly. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" Signed-off-by: Uros Bizjak --- arch/x86/kernel/traps.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index c876f1d36a81..78b1d1a6ed2c 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -772,7 +772,7 @@ DEFINE_IDTENTRY_RAW(exc_int3) */ asmlinkage __visible noinstr struct pt_regs *sync_regs(struct pt_regs *ere= gs) { - struct pt_regs *regs =3D (struct pt_regs *)this_cpu_read(pcpu_hot.top_of_= stack) - 1; + struct pt_regs *regs =3D (struct pt_regs *)current_top_of_stack() - 1; if (regs !=3D eregs) *regs =3D *eregs; return regs; @@ -790,7 +790,7 @@ asmlinkage __visible noinstr struct pt_regs *vc_switch_= off_ist(struct pt_regs *r * trust it and switch to the current kernel stack */ if (ip_within_syscall_gap(regs)) { - sp =3D this_cpu_read(pcpu_hot.top_of_stack); + sp =3D current_top_of_stack(); goto sync; } =20 --=20 2.41.0