X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=fs%2Fext4%2Ffsync.c;h=ce66d2fe826cbdf99389dea50aa3f72240e911d9;hb=93628ffb9ba67c154849ac6c387f98f5e3198b84;hp=60fe5721fbe3d57cac0a8680d99a8751c3466210;hpb=bbd2be36910728f485ac78ea36e0f4f5a38e691e;p=karo-tx-linux.git

diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 60fe5721fbe3..ce66d2fe826c 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -172,6 +172,7 @@ int ext4_sync_file(struct file *file, int datasync)
 	journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
 	int ret;
 	tid_t commit_tid;
+	bool needs_barrier = false;
 
 	J_ASSERT(ext4_journal_current_handle() == NULL);
 
@@ -211,22 +212,12 @@ int ext4_sync_file(struct file *file, int datasync)
 	}
 
 	commit_tid = datasync ? ei->i_datasync_tid : ei->i_sync_tid;
-	if (jbd2_log_start_commit(journal, commit_tid)) {
-		/*
-		 * When the journal is on a different device than the
-		 * fs data disk, we need to issue the barrier in
-		 * writeback mode.  (In ordered mode, the jbd2 layer
-		 * will take care of issuing the barrier.  In
-		 * data=journal, all of the data blocks are written to
-		 * the journal device.)
-		 */
-		if (ext4_should_writeback_data(inode) &&
-		    (journal->j_fs_dev != journal->j_dev) &&
-		    (journal->j_flags & JBD2_BARRIER))
-			blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL,
-					NULL);
-		ret = jbd2_log_wait_commit(journal, commit_tid);
-	} else if (journal->j_flags & JBD2_BARRIER)
+	if (journal->j_flags & JBD2_BARRIER &&
+	    !jbd2_trans_will_send_data_barrier(journal, commit_tid))
+		needs_barrier = true;
+	jbd2_log_start_commit(journal, commit_tid);
+	ret = jbd2_log_wait_commit(journal, commit_tid);
+	if (needs_barrier)
 		blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
  out:
 	trace_ext4_sync_file_exit(inode, ret);