Received: by 2002:a05:6359:c8b:b0:c7:702f:21d4 with SMTP id go11csp2146012rwb; Sat, 8 Oct 2022 03:06:48 -0700 (PDT) X-Google-Smtp-Source: AMsMyM4UcF14t0t+9W1oETLv35SqeAb052UA4GGZwxKydPekOh8t7JlsKg7imJNzvcMFeFeG1k2d X-Received: by 2002:a63:1d1:0:b0:43a:348b:63fd with SMTP id 200-20020a6301d1000000b0043a348b63fdmr8541498pgb.52.1665223608402; Sat, 08 Oct 2022 03:06:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1665223608; cv=none; d=google.com; s=arc-20160816; b=mv//m2jBfRbNO5ekc9hLTFrJ4HKD6xvyRNY1pS7VcGCzfUZxwCkYOlkQl3eN38QsTl RjT2qkgmGB5chNTTxfeLYQ4mxVIqCg9J1lX4ujvf7QRdNsoIzqNbge9VYi/qwUTbd27y F7oW+8o93ICX6wDxzv/AdZy0vz9Rl7402VDW9FNxCcJM8jvIk4FK2zGQgGQmvIsP/V8N uDUS9FaZH3g00AQH/0DfEe1s6PhJUAEBWSOkrijfLoAGTpV5JLDIWdcj5RmyHa+iO6v9 Mja3V1UbdngWoNlwCIGxn6REc1DGChzJXN2lDteDWglwm4p2uyasjpWZDrM7O3HakCNF zxVw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:message-id:date:subject:cc:to:from; bh=aWbW0uOsjmE39MOsDlIjnovWUQyT5wqji6Zev5pJqi4=; b=TsseDXqq7rOoQr+L4NhcXJBwY+vfTHw3Bp0XCPlb+TRkx90L9my5dpVwkpIy9E5FpS tFGSXJuevhIu95ukS2v8cFxA3Ly/jYbcyChzqf7hILEcpdJ9QCUCE7U7/Fr6anPTjmGN zCpXgVh88VS0ExIzpQ5IrqpNPNsyBbdwxfcJTYEQqZrNQYFxrJBVw04FEzOYs1APy5AP ftLuOQO36wIWF/NgiQ66rUawLMNZYGcXoMkBbPZOLf3XvC9qIpCjvDbsewu1RF4/olhq LviI+IG0Kxnk7Z2R3S1+/s8sG1YVcyV+2NeG1/99UlsmUdq9/Ymh54sZkQR5GOMrqsrg JWiw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id z18-20020a170902ee1200b0017f59ed2dfasi4915535plb.63.2022.10.08.03.06.37; Sat, 08 Oct 2022 03:06:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229834AbiJHJkS (ORCPT + 99 others); Sat, 8 Oct 2022 05:40:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40866 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229510AbiJHJkQ (ORCPT ); Sat, 8 Oct 2022 05:40:16 -0400 Received: from mail.nfschina.com (mail.nfschina.com [124.16.136.209]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id F2C1D3DBF9 for ; Sat, 8 Oct 2022 02:40:14 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mail.nfschina.com (Postfix) with ESMTP id 3BB601E80D72; Sat, 8 Oct 2022 17:34:27 +0800 (CST) X-Virus-Scanned: amavisd-new at test.com Received: from mail.nfschina.com ([127.0.0.1]) by localhost (mail.nfschina.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bxIa5yYX8fkl; Sat, 8 Oct 2022 17:34:24 +0800 (CST) Received: from localhost.localdomain.localdomain (unknown [219.141.250.2]) (Authenticated sender: xupengfei@nfschina.com) by mail.nfschina.com (Postfix) with ESMTPA id 724261E80D4D; Sat, 8 Oct 2022 17:34:24 +0800 (CST) From: XU pengfei To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, XU pengfei Subject: [PATCH 1/1] mm/mmap_lock: Remove unnecessary 'NULL' values from Pointer Date: Sat, 8 Oct 2022 17:39:43 +0800 Message-Id: <20221008093942.3982-1-xupengfei@nfschina.com> X-Mailer: git-send-email 2.18.2 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Pointer variables allocate memory first, and then judge. There is no need to initialize the assignment. Signed-off-by: XU pengfei --- mm/mmap_lock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/mmap_lock.c b/mm/mmap_lock.c index 1854850b4b89..65a57731aa15 100644 --- a/mm/mmap_lock.c +++ b/mm/mmap_lock.c @@ -198,7 +198,7 @@ void trace_mmap_lock_unreg(void) */ static const char *get_mm_memcg_path(struct mm_struct *mm) { - char *buf = NULL; + char *buf; struct mem_cgroup *memcg = get_mem_cgroup_from_mm(mm); if (memcg == NULL) -- 2.18.2