Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758957Ab0HLMCL (ORCPT ); Thu, 12 Aug 2010 08:02:11 -0400 Received: from mail.pripojeni.net ([217.66.174.14]:32900 "EHLO smtp.pripojeni.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753851Ab0HLMCJ (ORCPT ); Thu, 12 Aug 2010 08:02:09 -0400 From: Jiri Slaby To: neilb@suse.de Cc: akpm@linux-foundation.org, linux-raid@vger.kernel.org, jirislaby@gmail.com, linux-kernel@vger.kernel.org, Jiri Slaby , Christoph Hellwig Subject: [PATCH] MD: raid1, fix BUG caused by flags handling Date: Thu, 12 Aug 2010 14:01:05 +0200 Message-Id: <1281614465-2816-1-git-send-email-jslaby@suse.cz> X-Mailer: git-send-email 1.7.2.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2481 Lines: 65 Commit 74450be1 (block: unify flags for struct bio and struct request) added direct test of flags in the & form: const bool do_sync = (bio->bi_rw & REQ_SYNC); But this doesn't fit into bool with my compiler (gcc 4.5). So change the type to ulong to avoid the bug. The BUG looks like: EXT3-fs (md1): using internal journal ------------[ cut here ]------------ kernel BUG at drivers/scsi/scsi_lib.c:1113! ... Pid: 879, comm: md3_raid1 Tainted: G W 2.6.35-rc5-mm1_64+ #1265 RIP: 0010:[] [] scsi_setup_fs_cmnd+0x96/0xd0 Process md3_raid1 (pid: 879, threadinfo ffff8801c4716000, task ffff8801cbd5a6a0) ... Call Trace: [] sd_prep_fn+0xa8/0x800 [] ? cfq_dispatch_request+0x49/0xb0 [] blk_peek_request+0xca/0x1a0 [] scsi_request_fn+0x56/0x400 [] __generic_unplug_device+0x2d/0x40 [] generic_unplug_device+0x29/0x40 [] blk_unplug+0x12/0x20 [] unplug_slaves+0x78/0xc0 [] raid1d+0x37b/0x420 [] md_thread+0x53/0x120 ... Code: e8 d0 fe ff ff 5b 41 5c c9 c3 0f 1f 00 4c 89 e7 be 20 00 00 00 e8 db 9f ff ff 48 89 c7 48 85 c0 74 35 48 89 83 c8 00 00 00 eb a3 <0f> 0b 48 8b 00 48 85 c0 74 83 48 8b 40 48 48 85 c0 0f 84 76 ff RIP [] scsi_setup_fs_cmnd+0x96/0xd0 Signed-off-by: Jiri Slaby Cc: Christoph Hellwig Cc: Neil Brown --- Neil, did you expect me to send a patch for this? It's 2 weeks since the cause is known, but it is not in the -next tree yet. drivers/md/raid1.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 73cc74f..ebb81b0 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -787,8 +787,8 @@ static int make_request(mddev_t *mddev, struct bio * bio) struct bio_list bl; struct page **behind_pages = NULL; const int rw = bio_data_dir(bio); - const bool do_sync = (bio->bi_rw & REQ_SYNC); - bool do_barriers; + const unsigned long do_sync = (bio->bi_rw & REQ_SYNC); + unsigned long do_barriers; mdk_rdev_t *blocked_rdev; /* -- 1.7.2.1 -- 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/