1 files changed, 18 insertions, 32 deletions

diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 638ce4554c76..0b52924a0cb6 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -30,6 +30,7 @@
 #include <linux/bit_spinlock.h>
 #include <linux/mutex.h>
 #include <linux/timer.h>
+#include <linux/slab.h>
 #endif
 
 #define journal_oom_retry 1
@@ -69,15 +70,8 @@ extern u8 jbd2_journal_enable_debug;
 #define jbd_debug(f, a...)      /**/
 #endif
 
-static inline void *jbd2_alloc(size_t size, gfp_t flags)
-{
-        return (void *)__get_free_pages(flags, get_order(size));
-}
-
-static inline void jbd2_free(void *ptr, size_t size)
-{
-        free_pages((unsigned long)ptr, get_order(size));
-};
+extern void *jbd2_alloc(size_t size, gfp_t flags);
+extern void jbd2_free(void *ptr, size_t size);
 
 #define JBD2_MIN_JOURNAL_BLOCKS 1024
 
@@ -284,19 +278,8 @@ typedef struct journal_superblock_s
 
 #define J_ASSERT(assert)        BUG_ON(!(assert))
 
-#if defined(CONFIG_BUFFER_DEBUG)
-void buffer_assertion_failure(struct buffer_head *bh);
-#define J_ASSERT_BH(bh, expr)                                           \
-        do {                                                            \
-                if (!(expr))                                            \
-                        buffer_assertion_failure(bh);                   \
-                J_ASSERT(expr);                                         \
-        } while (0)
-#define J_ASSERT_JH(jh, expr)   J_ASSERT_BH(jh2bh(jh), expr)
-#else
 #define J_ASSERT_BH(bh, expr)   J_ASSERT(expr)
 #define J_ASSERT_JH(jh, expr)   J_ASSERT(expr)
-#endif
 
 #if defined(JBD2_PARANOID_IOFAIL)
 #define J_EXPECT(expr, why...)          J_ASSERT(expr)
@@ -618,13 +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
@@ -646,7 +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
@@ -781,7 +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]
@@ -1043,11 +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);
 
@@ -1059,7 +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,
@@ -1098,7 +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 *);
@@ -1273,8 +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;
 }