From nobody Thu Apr 9 11:10:51 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2234426B2D3 for ; Tue, 10 Mar 2026 06:55:20 +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=1773125723; cv=none; b=VQtwkFDDKNza6KTzDvZ36Yp4p8atEmDiB+61pxFN804/6w4/xaoxY5K+L7OIzA+LTCxz9LMVzf3t6wmQ9U+Trnws09G4YW+lns7IMmmQ/3baUxY38sf0StpKQy32nrYJ3gAiaoBONRWcHal8hcl5nfgzI9zAQ7xV7ShLTCYgTBY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773125723; c=relaxed/simple; bh=FWtkSisUeR0pG0Hk+MuSW+wyocBn7Z1zPYsGGnzKDW8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hQSj2Jfu8XYY5g6w2WDV3JaydAyUuksKGllDPZ8xsm1yAR0KauRosjtsCTMCzI8KrprGi/qqLS5VnpNijox+FG2kW9pa7s4td7fNo220HRn09oE5/HZAZUiYjZeYy5s0bZPOxrrWUGIhI4pifvQTpVNThLBl3CPLyfISW/qupLs= 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 _____8Cx58FXwK9piGsZAA--.62517S3; Tue, 10 Mar 2026 14:55:19 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowJBxKMFPwK9prulRAA--.11822S5; Tue, 10 Mar 2026 14:55:19 +0800 (CST) From: Tiezhu Yang To: Huacai Chen Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v1 3/3] LoongArch: No need to flush icache if copy failed Date: Tue, 10 Mar 2026 14:55:10 +0800 Message-ID: <20260310065510.8189-4-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20260310065510.8189-1-yangtiezhu@loongson.cn> References: <20260310065510.8189-1-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: qMiowJBxKMFPwK9prulRAA--.11822S5 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj9xXoW7Wr4rAr47Zw4xur4UKF1ruFX_yoWfZwc_W3 WSg34kGrWrAa1qv3WY93s5Xryqva1F9F4F93ZFvr4xCwn3J34UK3yYqwn8Ar9rKrWxCrZx Cr4UW3sxCw1jkosvyTuYvTs0mTUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUb28YFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_JFv_Jw1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVW5JVW7JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0cIa020Ex4CE44I27w Aqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jw0_WrylYx0Ex4A2jsIE 14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x 0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E 7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jrv_JF1lIxkGc2Ij64vIr41lIxAIcV C0I7IYx2IY67AKxVW5JVW7JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07Ul4E_UUUUU= Content-Type: text/plain; charset="utf-8" If copy_to_kernel_nofault() failed, no need to flush icache and just return -EFAULT immediately. Signed-off-by: Tiezhu Yang --- arch/loongarch/kernel/inst.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/loongarch/kernel/inst.c b/arch/loongarch/kernel/inst.c index 77da3b886dcb..dd5e8864eff9 100644 --- a/arch/loongarch/kernel/inst.c +++ b/arch/loongarch/kernel/inst.c @@ -246,13 +246,15 @@ static int text_copy_cb(void *data) =20 if (smp_processor_id() =3D=3D copy->cpu) { ret =3D copy_to_kernel_nofault(copy->dst, copy->src, copy->len); - if (ret) + if (ret) { pr_err("%s: operation failed\n", __func__); + return -EFAULT; + } } =20 flush_icache_range((unsigned long)copy->dst, (unsigned long)copy->dst + c= opy->len); =20 - return ret; + return 0; } =20 int larch_insn_text_copy(void *dst, void *src, size_t len) --=20 2.42.0