From nobody Mon Feb 9 10:16:30 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 1F01531353C for ; Tue, 23 Dec 2025 08:12:49 +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=1766477573; cv=none; b=J1dq2MZ+ACUufy55XSTdri2pqEPQDKLQpN1xBVWOkKhd+sQ1ApgzZ9Y/HAsxCmsDzQqr4y6+L/3HF6nPKx/GdhStkRRkUqAxTGpFYvn7hn4xP8JVX5WyLoAJ93la6HnBQw45LMjc2vOr6rvVrTrMqBrg15LoCqO30y5nPrV40G8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766477573; c=relaxed/simple; bh=uPLUSZt5bqT5HDBfC8mUHeHe8Uxjq0CRrOKJn/Guk58=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GdUMc6ta3MyIgysuHWJ8OkRu11tAThLVEtcU4L/TVITA0RWXEbJhOWsimKxKf/wR7hehWYKElnchr8Wo8JogJJOIlZb76QxbGnE1dIR4ro2cvlyl4JjEZqCjtZvbb5inCnQKd4GTp5NFnD1CBu5aZMaicwL3PLSmthgRdBbaznM= 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 [223.64.69.54]) by gateway (Coremail) with SMTP id _____8Dx+8L6Tkppe1ACAA--.6923S3; Tue, 23 Dec 2025 16:12:42 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.69.54]) by front1 (Coremail) with SMTP id qMiowJCxecH0TkppccMDAA--.402S2; Tue, 23 Dec 2025 16:12:41 +0800 (CST) From: Huacai Chen To: Huacai Chen Cc: loongarch@lists.linux.dev, Xuefeng Li , Guo Ren , Xuerui Wang , Jiaxun Yang , linux-kernel@vger.kernel.org, Huacai Chen Subject: [PATCH] LoongArch: Select HAVE_CMPXCHG_LOCAL in Kconfig Date: Tue, 23 Dec 2025 16:12:28 +0800 Message-ID: <20251223081228.3367509-1-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.47.3 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: qMiowJCxecH0TkppccMDAA--.402S2 X-CM-SenderInfo: hfkh0x5xdftxo6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj9xXoW7GFy8Kry8trW3Gw1UXF4rXrc_yoWfWrb_Wa n3A3W8GF1rAFWj9a4qvF4FgF43ua1DuFs0krW29F4xu3W7X343J3y8Xwn5Zr1Ig3y5WFs5 ZrWkXr9xCr12yosvyTuYvTs0mTUanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUb7AYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_JrI_Jryl8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0cIa020Ex4CE44I27w Aqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jrv_JF1lYx0Ex4A2jsIE 14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x 0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E 7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcV C0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Jr0_GrUvcSsGvfC2KfnxnUUI43ZEXa7IU8yrW7UUUUU== Content-Type: text/plain; charset="utf-8" LoongArch has already implemented cmpxchg_local(), this_cpu_cmpxchg() and similar functions, so select HAVE_CMPXCHG_LOCAL in Kconfig to avoid incurring the overhead of local_irq_save()/local_irq_restore() for page state helpers in mm/vmstat.c. Signed-off-by: Huacai Chen --- arch/loongarch/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 730f34214519..ae9d954aa052 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -130,6 +130,7 @@ config LOONGARCH select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_USERFAULTFD_MINOR if USERFAULTFD select HAVE_ASM_MODVERSIONS + select HAVE_CMPXCHG_LOCAL select HAVE_CONTEXT_TRACKING_USER select HAVE_C_RECORDMCOUNT select HAVE_DEBUG_KMEMLEAK --=20 2.47.3