1 files changed, 15 insertions, 12 deletions

diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index a4d2e9f7088a..0b52924a0cb6 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -601,13 +601,13 @@ struct transaction_s
          * Number of outstanding updates running on this transaction
          * [t_handle_lock]
          */
-        int                     t_updates;
+        atomic_t                t_updates;
 
         /*
          * Number of buffers reserved for use by all handles in this transaction
          * handle but not yet modified. [t_handle_lock]
          */
-        int                     t_outstanding_credits;
+        atomic_t                t_outstanding_credits;
 
         /*
          * Forward and backward links for the circular list of all transactions
@@ -629,7 +629,7 @@ struct transaction_s
         /*
          * How many handles used this transaction? [t_handle_lock]
          */
-        int t_handle_count;
+        atomic_t                t_handle_count;
 
         /*
          * This transaction is being forced and some process is
@@ -764,7 +764,7 @@ struct journal_s
         /*
          * Protect the various scalars in the journal
          */
-        spinlock_t              j_state_lock;
+        rwlock_t                j_state_lock;
 
         /*
          * Number of processes waiting to create a barrier lock [j_state_lock]
@@ -1026,11 +1026,12 @@ void __jbd2_journal_insert_checkpoint(struct journal_head *, transaction_t *);
 
 struct jbd2_buffer_trigger_type {
         /*
-         * Fired just before a buffer is written to the journal.
-         * mapped_data is a mapped buffer that is the frozen data for
-         * commit.
+         * Fired a the moment data to write to the journal are known to be
+         * stable - so either at the moment b_frozen_data is created or just
+         * before a buffer is written to the journal.  mapped_data is a mapped
+         * buffer that is the frozen data for commit.
          */
-        void (*t_commit)(struct jbd2_buffer_trigger_type *type,
+        void (*t_frozen)(struct jbd2_buffer_trigger_type *type,
                          struct buffer_head *bh, void *mapped_data,
                          size_t size);
 
@@ -1042,7 +1043,7 @@ struct jbd2_buffer_trigger_type {
                         struct buffer_head *bh);
 };
 
-extern void jbd2_buffer_commit_trigger(struct journal_head *jh,
+extern void jbd2_buffer_frozen_trigger(struct journal_head *jh,
                                        void *mapped_data,
                                        struct jbd2_buffer_trigger_type *triggers);
 extern void jbd2_buffer_abort_trigger(struct journal_head *jh,
@@ -1081,7 +1082,9 @@ static inline handle_t *journal_current_handle(void)
  */
 
 extern handle_t *jbd2_journal_start(journal_t *, int nblocks);
-extern int       jbd2_journal_restart (handle_t *, int nblocks);
+extern handle_t *jbd2__journal_start(journal_t *, int nblocks, int gfp_mask);
+extern int       jbd2_journal_restart(handle_t *, int nblocks);
+extern int       jbd2__journal_restart(handle_t *, int nblocks, int gfp_mask);
 extern int       jbd2_journal_extend (handle_t *, int nblocks);
 extern int       jbd2_journal_get_write_access(handle_t *, struct buffer_head *);
 extern int       jbd2_journal_get_create_access (handle_t *, struct buffer_head *);
@@ -1256,8 +1259,8 @@ static inline int jbd_space_needed(journal_t *journal)
 {
         int nblocks = journal->j_max_transaction_buffers;
         if (journal->j_committing_transaction)
-                nblocks += journal->j_committing_transaction->
-                                        t_outstanding_credits;
+                nblocks += atomic_read(&journal->j_committing_transaction->
+                                       t_outstanding_credits);
         return nblocks;
 }