From patchwork Mon Aug 26 10:08:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tiwei Bie X-Patchwork-Id: 1976757 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=vvV9xFX7; dkim=pass (1024-bit key; unprotected) header.d=antgroup.com header.i=@antgroup.com header.a=rsa-sha256 header.s=default header.b=Mos3FWdf; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=patchwork.ozlabs.org) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4WsmmM6p48z1ygH for ; Mon, 26 Aug 2024 20:16:19 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jo0r7PE2P21mYE53WxHNzNjxHnLxdNhP0Cu28IOO4aU=; b=vvV9xFX7FzcZaRDfIJBjzw5X1X i8qaEw2jqu7wOZvmcn8uCRs0Rji7ZQgiraH3nsi5d3Y7bQ+1O9UgrhbpXlPVa747fdkkLTsSkfT5R lBi6SxwQij8FxqD3OgP7zAh74ZMgJ+GwphrvvbHwpOawU/k2QDNXEjNaAVXUaJp8Tch4VHL+JvP1U kZTnRUsUhVA5NNrzgzp3mPAY5hZFrTEUH8kwMpEheKs/nlCpzDT1wWtURgJCyFEprZCMdyVRDGBzQ 1Gce1xg52s9KXBLdCmkG+er+SGlij6Ka245mAzBydSv/6UbDCcpQykbpBcb4j83tw8AwUtC6sIQA5 kn4jXi0Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1siWlk-00000006sy5-0ex6; Mon, 26 Aug 2024 10:16:16 +0000 Received: from out0-195.mail.aliyun.com ([140.205.0.195]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1siWeH-00000006qtP-0oWY for linux-um@lists.infradead.org; Mon, 26 Aug 2024 10:08:35 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=antgroup.com; s=default; t=1724666907; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=jo0r7PE2P21mYE53WxHNzNjxHnLxdNhP0Cu28IOO4aU=; b=Mos3FWdfI3XuyKQUNYQfnq2Q0a5U8o6tkzKEqvacbqoV0AtYLlr7zQQXRSvpQRZnAHNXvg6TAaste7UbIaH/11nuXHTpXL19twW83LNioPfzPLy6farIgUbjacbmbjjN2ibLYoFMJh/6WLjoF/JJyZEPR7Er1EzQ+ZCdiVRNajc= Received: from ubuntu..(mailfrom:tiwei.btw@antgroup.com fp:SMTPD_---.Z2YRscp_1724666906) by smtp.aliyun-inc.com; Mon, 26 Aug 2024 18:08:27 +0800 From: "Tiwei Bie" To: richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net Cc: , , "Tiwei Bie" Subject: [PATCH v3 2/7] um: Remove the redundant newpage check in update_pte_range Date: Mon, 26 Aug 2024 18:08:10 +0800 Message-Id: <20240826100815.904430-3-tiwei.btw@antgroup.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240826100815.904430-1-tiwei.btw@antgroup.com> References: <20240826100815.904430-1-tiwei.btw@antgroup.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240826_030833_692447_9ABE37E6 X-CRM114-Status: UNSURE ( 7.16 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: The two checks have been identical since commit ef714f15027c ("um: remove force_flush_all from fork_handler"). And the inner one isn't necessary anymore. Signed-off-by: Tiwei Bie --- arch/um/kernel/tlb.c | 16 ++++++ 1 file changed, 6 insertions(+), 10 deletions(-) Content analysis details: (-2.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 RCVD_IN_VALIDITY_SAFE_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. 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[140.205.0.195 listed in bl.score.senderscore.com] 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines -0.0 T_SCC_BODY_TEXT_LINE No description available. X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" Errors-To: linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org The two checks have been identical since commit ef714f15027c ("um: remove force_flush_all from fork_handler"). And the inner one isn't necessary anymore. Signed-off-by: Tiwei Bie --- arch/um/kernel/tlb.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index 44c6fc697f3a..548af31d4111 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -82,16 +82,12 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr, (x ? UM_PROT_EXEC : 0)); if (pte_newpage(*pte)) { if (pte_present(*pte)) { - if (pte_newpage(*pte)) { - __u64 offset; - unsigned long phys = - pte_val(*pte) & PAGE_MASK; - int fd = phys_mapping(phys, &offset); - - ret = ops->mmap(ops->mm_idp, addr, - PAGE_SIZE, prot, fd, - offset); - } + __u64 offset; + unsigned long phys = pte_val(*pte) & PAGE_MASK; + int fd = phys_mapping(phys, &offset); + + ret = ops->mmap(ops->mm_idp, addr, PAGE_SIZE, + prot, fd, offset); } else ret = ops->unmap(ops->mm_idp, addr, PAGE_SIZE); } else if (pte_newprot(*pte))