Preparation to hide the sb->s_writers internals from xfs and btrfs. Add 2 trivial define's they can use rather than play with ->s_writers directly. No changes in btrfs/transaction.o and xfs/xfs_aops.o. Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx> --- fs/btrfs/transaction.c | 8 ++------ fs/xfs/xfs_aops.c | 6 ++---- include/linux/fs.h | 5 +++++ 3 files changed, 9 insertions(+), 10 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 5628e25..6dca4e9 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1620,9 +1620,7 @@ static void do_async_commit(struct work_struct *work) * Tell lockdep about it. */ if (ac->newtrans->type & __TRANS_FREEZABLE) - rwsem_acquire_read( - &ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], - 0, 1, _THIS_IP_); + __sb_acquire_write(ac->root->fs_info->sb, SB_FREEZE_FS); current->journal_info = ac->newtrans; @@ -1661,9 +1659,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, * async commit thread will be the one to unlock it. */ if (ac->newtrans->type & __TRANS_FREEZABLE) - rwsem_release( - &root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], - 1, _THIS_IP_); + __sb_release_write(root->fs_info->sb, SB_FREEZE_FS); schedule_work(&ac->work); diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index a56960d..8034c78 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -119,8 +119,7 @@ xfs_setfilesize_trans_alloc( * We may pass freeze protection with a transaction. So tell lockdep * we released it. */ - rwsem_release(&ioend->io_inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1], - 1, _THIS_IP_); + __sb_release_write(ioend->io_inode->i_sb, SB_FREEZE_FS); /* * We hand off the transaction to the completion thread now, so * clear the flag here. @@ -171,8 +170,7 @@ xfs_setfilesize_ioend( * Similarly for freeze protection. */ current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); - rwsem_acquire_read(&VFS_I(ip)->i_sb->s_writers.lock_map[SB_FREEZE_FS-1], - 0, 1, _THIS_IP_); + __sb_acquire_write(VFS_I(ip)->i_sb, SB_FREEZE_FS); return xfs_setfilesize(ip, tp, ioend->io_offset, ioend->io_size); } diff --git a/include/linux/fs.h b/include/linux/fs.h index 35ec87e..78ac768 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1362,6 +1362,11 @@ extern struct timespec current_fs_time(struct super_block *sb); void __sb_end_write(struct super_block *sb, int level); int __sb_start_write(struct super_block *sb, int level, bool wait); +#define __sb_acquire_write(sb, lev) \ + rwsem_acquire_read(&(sb)->s_writers.lock_map[(lev)-1], 0, 1, _THIS_IP_) +#define __sb_release_write(sb, lev) \ + rwsem_release(&(sb)->s_writers.lock_map[(lev)-1], 1, _THIS_IP_) + /** * sb_end_write - drop write access to a superblock * @sb: the super we wrote to -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
