From nobody Tue Feb 10 12:14:29 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 572FA1C9ECF for ; Wed, 7 Aug 2024 08:59:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723021153; cv=none; b=atzhsZ9F6FejlbcfgppV3Hdgj7eNo1WZhxCwKoXY+ZvByu5sRK8+HvaaV32J0TWJnFCvdMApli9/7blzI/G+H/XvRWz8ZMONC9Msak7ln3HDqu0hYwzg0REGRcZOBn6yBuKE3+Z5ZwSEhgNmTWsZs9GNlo9ue6FQWbZk0Z2SDA0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723021153; c=relaxed/simple; bh=dQdc4zvokUMe37PQ1p3xMiSz2t9xWE7Hfgtf9NLWvBE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BXGzJhhe+LMQt1+eXA0vX+6W4a45ussAsKAd+u+35zNLONk8dRpXBMwoSEl14STBzTTgqHHtzRtsW37P/n2yPDSwlHNJy45nyCWRMKlCH5ixMRBEDGSQvIsEl35SErsRaCQVWc/E91YQHWu4zaggzd6vWw7tuOYTwQcaIFrkzOk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [113.200.148.30]) by gateway (Coremail) with SMTP id _____8Bx35teN7Nm0S8KAA--.5526S3; Wed, 07 Aug 2024 16:59:10 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowMDxvmdaN7NmO8EHAA--.24061S4; Wed, 07 Aug 2024 16:59:09 +0800 (CST) From: Tiezhu Yang To: Josh Poimboeuf , Peter Zijlstra , Huacai Chen Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/4] LoongArch: Remove STACK_FRAME_NON_STANDARD(do_syscall) Date: Wed, 7 Aug 2024 16:59:04 +0800 Message-ID: <20240807085906.27397-3-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240807085906.27397-1-yangtiezhu@loongson.cn> References: <20240807085906.27397-1-yangtiezhu@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMDxvmdaN7NmO8EHAA--.24061S4 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj9xXoW7JFykWr15JFyDtw4fWr48uFX_yoWDWrg_WF 1xKw1UWrWrtF42v3Z5t3W5uF4xZw1kJFsakFn2gry7Ka43JrZ8JFyYv345CF1q9aykWrZ5 urWkX3s0y34FyosvyTuYvTs0mTUanT9S1TB71UUUUUJqnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUb3AYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVW8JVW5JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1ln4kS14v26r1Y6r17M2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12 xvs2x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1q 6rW5McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64 vIr41l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxYO2xFxVAFwI0_ Jrv_JF1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1V AY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Gr0_Xr1lIxAI cVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42 IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIev Ja73UjIFyTuYvjxU4AhLUUUUU Content-Type: text/plain; charset="utf-8" For now, it can remove STACK_FRAME_NON_STANDARD(do_syscall) because there is no objtool warning "do_syscall+0x11c: return with modified stack frame", then there is handle_syscall() which is the previous frame of do_syscall() in the call trace when executing the command "echo l > /proc/sysrq-trigger". Fixes: a0f7085f6a63 ("LoongArch: Add RANDOMIZE_KSTACK_OFFSET support") Signed-off-by: Tiezhu Yang --- arch/loongarch/kernel/syscall.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/loongarch/kernel/syscall.c b/arch/loongarch/kernel/syscal= l.c index ba5d0930a74f..168bd97540f8 100644 --- a/arch/loongarch/kernel/syscall.c +++ b/arch/loongarch/kernel/syscall.c @@ -79,7 +79,3 @@ void noinstr __no_stack_protector do_syscall(struct pt_re= gs *regs) =20 syscall_exit_to_user_mode(regs); } - -#ifdef CONFIG_RANDOMIZE_KSTACK_OFFSET -STACK_FRAME_NON_STANDARD(do_syscall); -#endif --=20 2.42.0