From patchwork Fri Sep 11 12:14:06 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 33450 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.samba.org (fn.samba.org [216.83.154.106]) by bilbo.ozlabs.org (Postfix) with ESMTP id 75F69B7043 for ; Fri, 11 Sep 2009 22:14:23 +1000 (EST) Received: from fn.samba.org (localhost [127.0.0.1]) by lists.samba.org (Postfix) with ESMTP id A1334465D5; Fri, 11 Sep 2009 06:03:38 -0600 (MDT) X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on fn.samba.org X-Spam-Level: X-Spam-Status: No, score=-3.4 required=3.8 tests=AWL, BAYES_00, NO_MORE_FUNN, SPF_PASS autolearn=no version=3.2.5 X-Original-To: linux-cifs-client@lists.samba.org Delivered-To: linux-cifs-client@lists.samba.org Received: from cdptpa-omtalb.mail.rr.com (cdptpa-omtalb.mail.rr.com [75.180.132.120]) by lists.samba.org (Postfix) with ESMTP id 21380465BD for ; Fri, 11 Sep 2009 06:03:25 -0600 (MDT) Received: from mail.poochiereds.net ([71.70.153.3]) by cdptpa-omta02.mail.rr.com with ESMTP id <20090911121409347.TRW14103@cdptpa-omta02.mail.rr.com>; Fri, 11 Sep 2009 12:14:09 +0000 Received: by mail.poochiereds.net (Postfix, from userid 4447) id 0F02F58168; Fri, 11 Sep 2009 08:14:09 -0400 (EDT) From: Jeff Layton To: smfrench@gmail.com Date: Fri, 11 Sep 2009 08:14:06 -0400 Message-Id: <1252671248-15874-3-git-send-email-jlayton@redhat.com> X-Mailer: git-send-email 1.6.0.6 In-Reply-To: <1252671248-15874-1-git-send-email-jlayton@redhat.com> References: <1252671248-15874-1-git-send-email-jlayton@redhat.com> Cc: linux-cifs-client@lists.samba.org Subject: [linux-cifs-client] [PATCH 2/4] cifs: take read lock on GlobalSMBSes_lock in is_valid_oplock_break X-BeenThere: linux-cifs-client@lists.samba.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: The Linux CIFS VFS client List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-cifs-client-bounces@lists.samba.org Errors-To: linux-cifs-client-bounces@lists.samba.org ...rather than a write lock. It doesn't change the list so a read lock should be sufficient. Signed-off-by: Jeff Layton --- fs/cifs/misc.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index f2d508d..191e622 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -562,14 +562,14 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv) continue; cifs_stats_inc(&tcon->num_oplock_brks); - write_lock(&GlobalSMBSeslock); + read_lock(&GlobalSMBSeslock); list_for_each(tmp2, &tcon->openFileList) { netfile = list_entry(tmp2, struct cifsFileInfo, tlist); if (pSMB->Fid != netfile->netfid) continue; - write_unlock(&GlobalSMBSeslock); + read_unlock(&GlobalSMBSeslock); read_unlock(&cifs_tcp_ses_lock); cFYI(1, ("file id match, oplock break")); pCifsInode = CIFS_I(netfile->pInode); @@ -584,7 +584,7 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv) return true; } - write_unlock(&GlobalSMBSeslock); + read_unlock(&GlobalSMBSeslock); read_unlock(&cifs_tcp_ses_lock); cFYI(1, ("No matching file for oplock break")); return true;