Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754061AbYJCPM1 (ORCPT ); Fri, 3 Oct 2008 11:12:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752922AbYJCPMA (ORCPT ); Fri, 3 Oct 2008 11:12:00 -0400 Received: from mx2.redhat.com ([66.187.237.31]:34739 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752680AbYJCPL6 (ORCPT ); Fri, 3 Oct 2008 11:11:58 -0400 Date: Fri, 03 Oct 2008 11:09:42 -0400 (EDT) Message-Id: <20081003.110942.41628922.k-ueda@ct.jp.nec.com> To: agk@redhat.com Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, dm-devel@redhat.com, mbroz@redhat.com, j-nomura@ce.jp.nec.com, k-ueda@ct.jp.nec.com Subject: [PATCH 1/8] dm core: remove unused DM_WQ_FLUSH_ALL From: Kiyoshi Ueda In-Reply-To: <20081003.110825.74754936.k-ueda@ct.jp.nec.com> References: <20081003.110825.74754936.k-ueda@ct.jp.nec.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2225 Lines: 73 This patch removes dead codes for the noflush suspend. No functional change. This patch is just a clean up of the codes and not functionally related to request-based dm. But included here due to literal dependency. The dm_queue_flush(md, DM_WQ_FLUSH_ALL, NULL) in dm_suspend() is never invoked because: - The 'goto flush_and_out' is same as 'goto out', because the 'goto flush_and_out' is called only when '!noflush' - If the 'r && noflush' is true, the interrupt check code above is invoked and 'goto out' Signed-off-by: Kiyoshi Ueda Signed-off-by: Jun'ichi Nomura Signed-off-by: Milan Broz Cc: Alasdair G Kergon --- drivers/md/dm.c | 14 +------------- 1 files changed, 1 insertion(+), 13 deletions(-) Index: 2.6.27-rc8/drivers/md/dm.c =================================================================== --- 2.6.27-rc8.orig/drivers/md/dm.c +++ 2.6.27-rc8/drivers/md/dm.c @@ -76,7 +76,6 @@ union map_info *dm_get_mapinfo(struct bi */ struct dm_wq_req { enum { - DM_WQ_FLUSH_ALL, DM_WQ_FLUSH_DEFERRED, } type; struct work_struct work; @@ -1388,9 +1387,6 @@ static void dm_wq_work(struct work_struc down_write(&md->io_lock); switch (req->type) { - case DM_WQ_FLUSH_ALL: - __merge_pushback_list(md); - /* pass through */ case DM_WQ_FLUSH_DEFERRED: __flush_deferred_io(md); break; @@ -1520,7 +1516,7 @@ int dm_suspend(struct mapped_device *md, if (!md->suspended_bdev) { DMWARN("bdget failed in dm_suspend"); r = -ENOMEM; - goto flush_and_out; + goto out; } /* @@ -1571,14 +1567,6 @@ int dm_suspend(struct mapped_device *md, set_bit(DMF_SUSPENDED, &md->flags); -flush_and_out: - if (r && noflush) - /* - * Because there may be already I/Os in the pushback list, - * flush them before return. - */ - dm_queue_flush(md, DM_WQ_FLUSH_ALL, NULL); - out: if (r && md->suspended_bdev) { bdput(md->suspended_bdev); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/