From patchwork Thu Jun 12 03:21:45 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joonsoo Kim X-Patchwork-Id: 4339241 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 56B6EBEEAA for ; Thu, 12 Jun 2014 03:19:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9B1302034C for ; Thu, 12 Jun 2014 03:19:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C33EA20303 for ; Thu, 12 Jun 2014 03:19:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755730AbaFLDSt (ORCPT ); Wed, 11 Jun 2014 23:18:49 -0400 Received: from lgeamrelo01.lge.com ([156.147.1.125]:55611 "EHLO lgeamrelo01.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755708AbaFLDRw (ORCPT ); Wed, 11 Jun 2014 23:17:52 -0400 Received: from unknown (HELO js1304-P5Q-DELUXE.LGE.NET) (10.177.220.145) by 156.147.1.125 with ESMTP; 12 Jun 2014 12:17:50 +0900 X-Original-SENDERIP: 10.177.220.145 X-Original-MAILFROM: iamjoonsoo.kim@lge.com From: Joonsoo Kim To: Andrew Morton , "Aneesh Kumar K.V" , Marek Szyprowski , Michal Nazarewicz Cc: Minchan Kim , Russell King - ARM Linux , Greg Kroah-Hartman , Paolo Bonzini , Gleb Natapov , Alexander Graf , Benjamin Herrenschmidt , Paul Mackerras , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Joonsoo Kim Subject: [PATCH v2 08/10] mm, cma: clean-up cma allocation error path Date: Thu, 12 Jun 2014 12:21:45 +0900 Message-Id: <1402543307-29800-9-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1402543307-29800-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1402543307-29800-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We can remove one call sites for clear_cma_bitmap() if we first call it before checking error number. Signed-off-by: Joonsoo Kim Acked-by: Minchan Kim Reviewed-by: Zhang Yanfei Reviewed-by: Michal Nazarewicz Reviewed-by: Aneesh Kumar K.V diff --git a/mm/cma.c b/mm/cma.c index 1e1b017..01a0713 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -282,11 +282,12 @@ struct page *cma_alloc(struct cma *cma, int count, unsigned int align) if (ret == 0) { page = pfn_to_page(pfn); break; - } else if (ret != -EBUSY) { - clear_cma_bitmap(cma, pfn, count); - break; } + clear_cma_bitmap(cma, pfn, count); + if (ret != -EBUSY) + break; + pr_debug("%s(): memory range at %p is busy, retrying\n", __func__, pfn_to_page(pfn)); /* try again with a bit different memory target */