From nobody Mon Feb 9 12:11:22 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E38D3315760 for ; Wed, 24 Dec 2025 10:35:41 +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=1766572543; cv=none; b=FwXP64LM1GmT+YLGagOe8WWvtgE5Vtc4ATyusfgM1r4UHPTnGz2rig5Tb8xCaLiiTUbLkH/zqfEV1S8ynMVpxPJsrtPMgoxkInhtYvBIN2AK2OcsGChZdsZ8D6oNkjs6SmeqR/A4jK3YdAZ0Iz/tb4Kq8rQZR+iqgTsieDSDL1Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766572543; c=relaxed/simple; bh=uy/rf7zsf9Lo6r2l3tS9K6IkA0RveHzNgA4wQl5+SXU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mDJqRKItProyKjN35YKcpR2t8dJAnUFvmQPrqSyBt0gH6k6zKBj0ih9lmymqa+xdbpANd76/v3P2WZfNPAgemPMJkMgvxvyFadNHNPGcrixq2mD1jn/ojjKmT2xMeKAh9onfcpQoXudzziNzMQ0r6QhppF2zjaGHCIpfrRCZMJQ= 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 _____8BxnsP5wUtp3bkCAA--.9132S3; Wed, 24 Dec 2025 18:35:37 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowJCx2+D0wUtpGjsEAA--.13037S3; Wed, 24 Dec 2025 18:35:33 +0800 (CST) From: Tiezhu Yang To: Huacai Chen Cc: Josh Poimboeuf , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] LoongArch: Use UNWIND_HINT_END_OF_STACK for entry points Date: Wed, 24 Dec 2025 18:35:15 +0800 Message-ID: <20251224103516.12654-2-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20251224103516.12654-1-yangtiezhu@loongson.cn> References: <20251224103516.12654-1-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: qMiowJCx2+D0wUtpGjsEAA--.13037S3 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj9xXoWrZF4UXF13XrWrGryrJFyxWFX_yoWDKFcEya 43Ga15W395Jay2qr1jvryfWr1Fq340yF1rC3W0qrZ2gan8A345Jw43A3WrZ3s0kr4kGrZ5 Cw4kW3Zavr12qosvyTuYvTs0mTUanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUb7AYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0cIa020Ex4CE44I27w Aqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JF0_Jw1lYx0Ex4A2jsIE 14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x 0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E 7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcV C0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Jr0_GrUvcSsGvfC2KfnxnUUI43ZEXa7IU82g43UUUUU== Content-Type: text/plain; charset="utf-8" kernel_entry() and smpboot_entry() are the last frames for ORC unwinder, so it is proper to use the annotation UNWIND_HINT_END_OF_STACK for them. Link: https://lore.kernel.org/lkml/ots6w2ntyudj5ucs5eowncta2vmfssatpcqwzpar= 3ekk577hxi@j45dd4dmwx6x/ Suggested-by: Josh Poimboeuf Signed-off-by: Tiezhu Yang --- arch/loongarch/kernel/head.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S index aba548db2446..ce7f6c04f4ab 100644 --- a/arch/loongarch/kernel/head.S +++ b/arch/loongarch/kernel/head.S @@ -42,6 +42,7 @@ SYM_DATA(kernel_fsize, .long _kernel_fsize); .align 12 =20 SYM_CODE_START(kernel_entry) # kernel entry point + UNWIND_HINT_END_OF_STACK =20 SETUP_TWINS SETUP_MODES t0 @@ -113,6 +114,7 @@ SYM_CODE_END(kernel_entry) * function after setting up the stack and tp registers. */ SYM_CODE_START(smpboot_entry) + UNWIND_HINT_END_OF_STACK =20 SETUP_TWINS SETUP_MODES t0 --=20 2.42.0 From nobody Mon Feb 9 12:11:22 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3362C314B8F for ; Wed, 24 Dec 2025 10:35:42 +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=1766572545; cv=none; b=N3xfMoEmeVa+0vBTqddmj44/yVT0011i/NoyUXwhwjIbbq+r804stfCvZQh781oa4uw2YIV2CsokxXXwqj+C56EyTyQNnkVyVwhfdhadzcdyiEMzrfPjHpxeDnXqvDi82weW9ldxoYoAVH6xJdCQ2+INRDyjbAPZ0dcMZO6XXsU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766572545; c=relaxed/simple; bh=ypFvyZm69/jminGaNJwnlAaaP6Sr0+rLixYiHkjbf/k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=R7sMPtC6dPKEm30vT7kPVd4VY9pw+sOTmencqwpey8/zNQlvqZ+3wrt/9ZwSH1TF1iZoSGaGxOycXaFN7+BK66hUN2sEwsFy9pDuBoASEBcP3kH/NqaIpWd6GHbfQsc7/xm1wBqTnOtEw65m70pxodKF0N82w9LNg/ILxrqWevk= 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 _____8CxKML6wUtp4LkCAA--.8594S3; Wed, 24 Dec 2025 18:35:38 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowJCx2+D0wUtpGjsEAA--.13037S4; Wed, 24 Dec 2025 18:35:37 +0800 (CST) From: Tiezhu Yang To: Huacai Chen Cc: Josh Poimboeuf , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] LoongArch: Remove is_entry_func() and kernel_entry_end Date: Wed, 24 Dec 2025 18:35:16 +0800 Message-ID: <20251224103516.12654-3-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20251224103516.12654-1-yangtiezhu@loongson.cn> References: <20251224103516.12654-1-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: qMiowJCx2+D0wUtpGjsEAA--.13037S4 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj93XoW7WrWxZF1rtr47Ar4fCw1DXFc_yoW8CF15pF 9xAr1DXrWF9F97t34DXw109rWDJrn7Ww1agF9rKFyrGF12qr13Zr1Fvw1DXF90q3yFgFWr XFnY9r90ka1UAacCm3ZEXasCq-sJn29KB7ZKAUJUUUU8529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUkFb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6xACxx 1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1q6rW5McIj6I8E87Iv 67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2 Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6x kF7I0E14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x07j0dgAUUUUU= Content-Type: text/plain; charset="utf-8" For now, the related codes of is_entry_func() are useless, so they can be removed. Then the symbol kernel_entry_end is not used any more, so it can be removed too. Link: https://lore.kernel.org/lkml/kjiyla6qj3l7ezspitulrdoc5laj2e6hoecvd254= hssnpddczm@g6nkaombh6va/ Suggested-by: Josh Poimboeuf Signed-off-by: Tiezhu Yang --- arch/loongarch/kernel/head.S | 2 -- arch/loongarch/kernel/unwind_orc.c | 11 ----------- 2 files changed, 13 deletions(-) diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S index ce7f6c04f4ab..7f288e89573b 100644 --- a/arch/loongarch/kernel/head.S +++ b/arch/loongarch/kernel/head.S @@ -144,5 +144,3 @@ SYM_CODE_START(smpboot_entry) SYM_CODE_END(smpboot_entry) =20 #endif /* CONFIG_SMP */ - -SYM_ENTRY(kernel_entry_end, SYM_L_GLOBAL, SYM_A_NONE) diff --git a/arch/loongarch/kernel/unwind_orc.c b/arch/loongarch/kernel/unw= ind_orc.c index 0d5fa64a2225..710f82d73797 100644 --- a/arch/loongarch/kernel/unwind_orc.c +++ b/arch/loongarch/kernel/unwind_orc.c @@ -348,14 +348,6 @@ void unwind_start(struct unwind_state *state, struct t= ask_struct *task, } EXPORT_SYMBOL_GPL(unwind_start); =20 -static bool is_entry_func(unsigned long addr) -{ - extern u32 kernel_entry; - extern u32 kernel_entry_end; - - return addr >=3D (unsigned long)&kernel_entry && addr < (unsigned long)&k= ernel_entry_end; -} - static inline unsigned long bt_address(unsigned long ra) { extern unsigned long eentry; @@ -402,9 +394,6 @@ bool unwind_next_frame(struct unwind_state *state) /* Don't let modules unload while we're reading their ORC data. */ guard(rcu)(); =20 - if (is_entry_func(state->pc)) - goto end; - orc =3D orc_find(state->pc); if (!orc) { /* --=20 2.42.0