From: Pekka J Enberg Subject: [PATCH 1/4] fs: introduce bgl_lock_ptr() Date: Mon, 17 Nov 2008 23:54:44 +0200 (EET) Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: adilger@sun.com, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, cl@linux-foundation.org, mpm@selenic.com, eduard.munteanu@linux360.ro To: akpm@linux-foundation.org Return-path: Received: from courier.cs.helsinki.fi ([128.214.9.1]:42483 "EHLO mail.cs.helsinki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754321AbYKQVyr (ORCPT ); Mon, 17 Nov 2008 16:54:47 -0500 Sender: linux-ext4-owner@vger.kernel.org List-ID: From: Pekka Enberg As suggested by Andreas Dilger, introduce a bgl_lock_ptr() helper in and add separate sb_bgl_lock() helpers to filesystem specific header files to break the hidden dependency to struct ext[234]_sb_info. Also, while at it, convert the macros to static inlines to try make up for all the times I broke Andrew Morton's tree. Cc: Andreas Dilger Signed-off-by: Pekka Enberg --- fs/ext4/ext4_sb.h | 6 ++++++ include/linux/blockgroup_lock.h | 7 +++++-- include/linux/ext2_fs_sb.h | 6 ++++++ include/linux/ext3_fs_sb.h | 6 ++++++ 4 files changed, 23 insertions(+), 2 deletions(-) diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h index 445fde6..b21f167 100644 --- a/fs/ext4/ext4_sb.h +++ b/fs/ext4/ext4_sb.h @@ -146,4 +146,10 @@ struct ext4_sb_info { struct flex_groups *s_flex_groups; }; +static inline spinlock_t * +sb_bgl_lock(struct ext4_sb_info *sbi, unsigned int block_group) +{ + return bgl_lock_ptr(&sbi->s_blockgroup_lock, block_group); +} + #endif /* _EXT4_SB */ diff --git a/include/linux/blockgroup_lock.h b/include/linux/blockgroup_lock.h index 8607312..e44b88b 100644 --- a/include/linux/blockgroup_lock.h +++ b/include/linux/blockgroup_lock.h @@ -53,7 +53,10 @@ static inline void bgl_lock_init(struct blockgroup_lock *bgl) * The accessor is a macro so we can embed a blockgroup_lock into different * superblock types */ -#define sb_bgl_lock(sb, block_group) \ - (&(sb)->s_blockgroup_lock.locks[(block_group) & (NR_BG_LOCKS-1)].lock) +static inline spinlock_t * +bgl_lock_ptr(struct blockgroup_lock *bgl, unsigned int block_group) +{ + return &bgl->locks[(block_group) & (NR_BG_LOCKS-1)].lock; +} #endif diff --git a/include/linux/ext2_fs_sb.h b/include/linux/ext2_fs_sb.h index f273415..dc541f3 100644 --- a/include/linux/ext2_fs_sb.h +++ b/include/linux/ext2_fs_sb.h @@ -108,4 +108,10 @@ struct ext2_sb_info { struct ext2_reserve_window_node s_rsv_window_head; }; +static inline spinlock_t * +sb_bgl_lock(struct ext2_sb_info *sbi, unsigned int block_group) +{ + return bgl_lock_ptr(&sbi->s_blockgroup_lock, block_group); +} + #endif /* _LINUX_EXT2_FS_SB */ diff --git a/include/linux/ext3_fs_sb.h b/include/linux/ext3_fs_sb.h index b65f028..e024e38 100644 --- a/include/linux/ext3_fs_sb.h +++ b/include/linux/ext3_fs_sb.h @@ -83,4 +83,10 @@ struct ext3_sb_info { #endif }; +static inline spinlock_t * +sb_bgl_lock(struct ext3_sb_info *sbi, unsigned int block_group) +{ + return bgl_lock_ptr(&sbi->s_blockgroup_lock, block_group); +} + #endif /* _LINUX_EXT3_FS_SB */ -- 1.5.4.3