Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756522Ab2HPKIw (ORCPT ); Thu, 16 Aug 2012 06:08:52 -0400 Received: from mail-we0-f174.google.com ([74.125.82.174]:41094 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752816Ab2HPKIu (ORCPT ); Thu, 16 Aug 2012 06:08:50 -0400 Message-ID: <502CC52D.20003@gmail.com> Date: Thu, 16 Aug 2012 12:02:21 +0200 From: Marco Stornelli User-Agent: Mozilla/5.0 (X11; Linux i686; rv:13.0) Gecko/20120601 Thunderbird/13.0 MIME-Version: 1.0 To: bharrosh@panasas.com, bhalevy@tonian.com, jack@suse.cz, Andrew Morton , adilger.kernel@dilger.ca, tytso@mit.edu, hirofumi@mail.parknet.co.jp, mikulas@artax.karlin.mff.cuni.cz, Al Viro , hch@infradead.org, dushistov@mail.ru, osd-dev@open-osd.org, Linux Kernel , linux-ext4@vger.kernel.org, Linux FS Devel Subject: [PATCH 4/8] ext4: remove lock/unlock super Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3456 Lines: 105 From: Marco Stornelli Replaced lock and unlock super with a new fs mutex s_lock. Signed-off-by: Marco Stornelli --- diff -Nurp linux-3.6-rc1-orig/fs/ext4/ext4.h linux-3.6-rc1/fs/ext4/ext4.h --- linux-3.6-rc1-orig/fs/ext4/ext4.h 2012-08-16 09:37:31.000000000 +0200 +++ linux-3.6-rc1/fs/ext4/ext4.h 2012-08-16 09:50:40.000000000 +0200 @@ -1293,6 +1293,8 @@ struct ext4_sb_info { /* Reference to checksum algorithm driver via cryptoapi */ struct crypto_shash *s_chksum_driver; + struct mutex s_lock; + /* Precomputed FS UUID checksum for seeding other checksums */ __u32 s_csum_seed; }; diff -Nurp linux-3.6-rc1-orig/fs/ext4/super.c linux-3.6-rc1/fs/ext4/super.c --- linux-3.6-rc1-orig/fs/ext4/super.c 2012-08-16 09:37:32.000000000 +0200 +++ linux-3.6-rc1/fs/ext4/super.c 2012-08-16 09:54:30.000000000 +0200 @@ -861,7 +861,7 @@ static void ext4_put_super(struct super_ flush_workqueue(sbi->dio_unwritten_wq); destroy_workqueue(sbi->dio_unwritten_wq); - lock_super(sb); + mutex_lock(&sbi->s_lock); if (sbi->s_journal) { err = jbd2_journal_destroy(sbi->s_journal); sbi->s_journal = NULL; @@ -928,7 +928,7 @@ static void ext4_put_super(struct super_ * Now that we are completely done shutting down the * superblock, we need to actually destroy the kobject. */ - unlock_super(sb); + mutex_unlock(&sbi->s_lock); kobject_put(&sbi->s_kobj); wait_for_completion(&sbi->s_kobj_unregister); if (sbi->s_chksum_driver) @@ -3718,6 +3718,7 @@ static int ext4_fill_super(struct super_ sbi->s_gdb_count = db_count; get_random_bytes(&sbi->s_next_generation, sizeof(u32)); spin_lock_init(&sbi->s_next_gen_lock); + mutex_init(&sbi->s_lock); init_timer(&sbi->s_err_report); sbi->s_err_report.function = print_daily_error_info; @@ -4519,11 +4520,11 @@ static int ext4_unfreeze(struct super_bl if (sb->s_flags & MS_RDONLY) return 0; - lock_super(sb); + mutex_lock(&EXT4_SB(sb)->s_lock); /* Reset the needs_recovery flag before the fs is unlocked. */ EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); ext4_commit_super(sb, 1); - unlock_super(sb); + mutex_unlock(&EXT4_SB(sb)->s_lock); return 0; } @@ -4559,7 +4560,7 @@ static int ext4_remount(struct super_blo char *orig_data = kstrdup(data, GFP_KERNEL); /* Store the original options */ - lock_super(sb); + mutex_lock(&sbi->s_lock); old_sb_flags = sb->s_flags; old_opts.s_mount_opt = sbi->s_mount_opt; old_opts.s_mount_opt2 = sbi->s_mount_opt2; @@ -4701,7 +4702,7 @@ static int ext4_remount(struct super_blo if (sbi->s_journal == NULL) ext4_commit_super(sb, 1); - unlock_super(sb); + mutex_unlock(&sbi->s_lock); #ifdef CONFIG_QUOTA /* Release old quota file names */ for (i = 0; i < MAXQUOTAS; i++) @@ -4715,7 +4716,7 @@ static int ext4_remount(struct super_blo EXT4_FEATURE_RO_COMPAT_QUOTA)) { err = ext4_enable_quotas(sb); if (err) { - lock_super(sb); + mutex_lock(&sbi->s_lock); goto restore_opts; } } @@ -4744,7 +4745,7 @@ restore_opts: sbi->s_qf_names[i] = old_opts.s_qf_names[i]; } #endif - unlock_super(sb); + mutex_unlock(&sbi->s_lock); kfree(orig_data); return err; } -- 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/