Merge commit 'v3.0-rc1' into kbuild/kbuild

1 files changed, 8 insertions, 9 deletions

diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index da871ee084d3..72ffa974b0b8 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -302,12 +302,6 @@ void journal_commit_transaction(journal_t *journal)
 	 * all outstanding updates to complete.
 	 */
 
-#ifdef COMMIT_STATS
-	spin_lock(&journal->j_list_lock);
-	summarise_journal_usage(journal);
-	spin_unlock(&journal->j_list_lock);
-#endif
-
 	/* Do we need to erase the effects of a prior journal_flush? */
 	if (journal->j_flags & JFS_FLUSHED) {
 		jbd_debug(3, "super block updated\n");
@@ -362,7 +356,7 @@ void journal_commit_transaction(journal_t *journal)
 	 * we do not require it to remember exactly which old buffers it
 	 * has reserved.  This is consistent with the existing behaviour
 	 * that multiple journal_get_write_access() calls to the same
-	 * buffer are perfectly permissable.
+	 * buffer are perfectly permissible.
 	 */
 	while (commit_transaction->t_reserved_list) {
 		jh = commit_transaction->t_reserved_list;
@@ -722,8 +716,13 @@ wait_for_iobuf:
                    required. */
 		JBUFFER_TRACE(jh, "file as BJ_Forget");
 		journal_file_buffer(jh, commit_transaction, BJ_Forget);
-		/* Wake up any transactions which were waiting for this
-		   IO to complete */
+		/*
+		 * Wake up any transactions which were waiting for this
+		 * IO to complete. The barrier must be here so that changes
+		 * by journal_file_buffer() take effect before wake_up_bit()
+		 * does the waitqueue check.
+		 */
+		smp_mb();
 		wake_up_bit(&bh->b_state, BH_Unshadow);
 		JBUFFER_TRACE(jh, "brelse shadowed buffer");
 		__brelse(bh);