[PATCH] sem2mutex: jbd, j_checkpoint_mutex

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/jbd/checkpoint.c

@@ -85,7 +85,7 @@ void __log_wait_for_space(journal_t *journal)
 		if (journal->j_flags & JFS_ABORT)
 			return;
 		spin_unlock(&journal->j_state_lock);
-		down(&journal->j_checkpoint_sem);
+		mutex_lock(&journal->j_checkpoint_mutex);
 
 		/*
 		 * Test again, another process may have checkpointed while we
@@ -98,7 +98,7 @@ void __log_wait_for_space(journal_t *journal)
 			log_do_checkpoint(journal);
 			spin_lock(&journal->j_state_lock);
 		}
-		up(&journal->j_checkpoint_sem);
+		mutex_unlock(&journal->j_checkpoint_mutex);
 	}
 }
 

fs/jbd/journal.c

@@ -659,8 +659,8 @@ static journal_t * journal_init_common (void)
 	init_waitqueue_head(&journal->j_wait_checkpoint);
 	init_waitqueue_head(&journal->j_wait_commit);
 	init_waitqueue_head(&journal->j_wait_updates);
-	init_MUTEX(&journal->j_barrier);
-	init_MUTEX(&journal->j_checkpoint_sem);
+	mutex_init(&journal->j_barrier);
+	mutex_init(&journal->j_checkpoint_mutex);
 	spin_lock_init(&journal->j_revoke_lock);
 	spin_lock_init(&journal->j_list_lock);
 	spin_lock_init(&journal->j_state_lock);

fs/jbd/transaction.c

@@ -455,7 +455,7 @@ void journal_lock_updates(journal_t *journal)
 	 * to make sure that we serialise special journal-locked operations
 	 * too.
 	 */
-	down(&journal->j_barrier);
+	mutex_lock(&journal->j_barrier);
 }
 
 /**
@@ -470,7 +470,7 @@ void journal_unlock_updates (journal_t *journal)
 {
 	J_ASSERT(journal->j_barrier_count != 0);
 
-	up(&journal->j_barrier);
+	mutex_unlock(&journal->j_barrier);
 	spin_lock(&journal->j_state_lock);
 	--journal->j_barrier_count;
 	spin_unlock(&journal->j_state_lock);

include/linux/jbd.h

@@ -28,6 +28,7 @@
 #include <linux/journal-head.h>
 #include <linux/stddef.h>
 #include <linux/bit_spinlock.h>
+#include <linux/mutex.h>
 #include <asm/semaphore.h>
 #endif
 
@@ -575,7 +576,7 @@ struct transaction_s
  * @j_wait_checkpoint:  Wait queue to trigger checkpointing
  * @j_wait_commit: Wait queue to trigger commit
  * @j_wait_updates: Wait queue to wait for updates to complete
- * @j_checkpoint_sem: Semaphore for locking against concurrent checkpoints
+ * @j_checkpoint_mutex: Mutex for locking against concurrent checkpoints
  * @j_head: Journal head - identifies the first unused block in the journal
  * @j_tail: Journal tail - identifies the oldest still-used block in the
  *  journal.
@@ -645,7 +646,7 @@ struct journal_s
 	int			j_barrier_count;
 
 	/* The barrier lock itself */
-	struct semaphore	j_barrier;
+	struct mutex		j_barrier;
 
 	/*
 	 * Transactions: The current running transaction...
@@ -687,7 +688,7 @@ struct journal_s
 	wait_queue_head_t	j_wait_updates;
 
 	/* Semaphore for locking against concurrent checkpoints */
-	struct semaphore 	j_checkpoint_sem;
+	struct mutex	 	j_checkpoint_mutex;
 
 	/*
 	 * Journal head: identifies the first unused block in the journal.