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Commit 72d63ed6 authored by Li Zefan's avatar Li Zefan Committed by Chris Mason
Browse files

Btrfs: use wait_event() 



Use wait_event() when possible to avoid code duplication.

Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent e55179b3

fs/btrfs/transaction.c

+7 −52
Original line number Diff line number Diff line
@@ -216,17 +216,11 @@ static void wait_current_trans(struct btrfs_root *root) 
	spin_lock(&root->fs_info->trans_lock);

	cur_trans = root->fs_info->running_transaction;

	if (cur_trans && cur_trans->blocked) {

		DEFINE_WAIT(wait);

		atomic_inc(&cur_trans->use_count);

		spin_unlock(&root->fs_info->trans_lock);

		while (1) {

			prepare_to_wait(&root->fs_info->transaction_wait, &wait,

					TASK_UNINTERRUPTIBLE);

			if (!cur_trans->blocked)

				break;

			schedule();

		}

		finish_wait(&root->fs_info->transaction_wait, &wait);



		wait_event(root->fs_info->transaction_wait,

			   !cur_trans->blocked);

		put_transaction(cur_trans);

	} else {

		spin_unlock(&root->fs_info->trans_lock);
@@ -360,15 +354,7 @@ struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root 
static noinline int wait_for_commit(struct btrfs_root *root,

				    struct btrfs_transaction *commit)

{

	DEFINE_WAIT(wait);

	while (!commit->commit_done) {

		prepare_to_wait(&commit->commit_wait, &wait,

				TASK_UNINTERRUPTIBLE);

		if (commit->commit_done)

			break;

		schedule();

	}

	finish_wait(&commit->commit_wait, &wait);

	wait_event(commit->commit_wait, commit->commit_done);

	return 0;

}
@@ -1085,22 +1071,7 @@ int btrfs_transaction_blocked(struct btrfs_fs_info *info) 
static void wait_current_trans_commit_start(struct btrfs_root *root,

					    struct btrfs_transaction *trans)

{

	DEFINE_WAIT(wait);



	if (trans->in_commit)

		return;



	while (1) {

		prepare_to_wait(&root->fs_info->transaction_blocked_wait, &wait,

				TASK_UNINTERRUPTIBLE);

		if (trans->in_commit) {

			finish_wait(&root->fs_info->transaction_blocked_wait,

				    &wait);

			break;

		}

		schedule();

		finish_wait(&root->fs_info->transaction_blocked_wait, &wait);

	}

	wait_event(root->fs_info->transaction_blocked_wait, trans->in_commit);

}



/*
@@ -1110,24 +1081,8 @@ static void wait_current_trans_commit_start(struct btrfs_root *root, 
static void wait_current_trans_commit_start_and_unblock(struct btrfs_root *root,

					 struct btrfs_transaction *trans)

{

	DEFINE_WAIT(wait);



	if (trans->commit_done || (trans->in_commit && !trans->blocked))

		return;



	while (1) {

		prepare_to_wait(&root->fs_info->transaction_wait, &wait,

				TASK_UNINTERRUPTIBLE);

		if (trans->commit_done ||

		    (trans->in_commit && !trans->blocked)) {

			finish_wait(&root->fs_info->transaction_wait,

				    &wait);

			break;

		}

		schedule();

		finish_wait(&root->fs_info->transaction_wait,

			    &wait);

	}

	wait_event(root->fs_info->transaction_wait,

		   trans->commit_done || (trans->in_commit && !trans->blocked));

}



/*