Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

[safe/jmp/linux-2.6] / include / linux / jbd.h

diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index a6d9daa..07a9b52 100644 (file)
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -30,9 +30,7 @@
 #include <linux/bit_spinlock.h>
 #include <linux/mutex.h>
 #include <linux/timer.h>
-
-#include <asm/semaphore.h>
-#endif
+#include <linux/lockdep.h>
 
 #define journal_oom_retry 1
 
@@ -57,7 +55,7 @@
  * CONFIG_JBD_DEBUG is on.
  */
 #define JBD_EXPENSIVE_CHECKING
-extern int journal_enable_debug;
+extern u8 journal_enable_debug;
 
 #define jbd_debug(n, f, a...)                                          \
        do {                                                            \
@@ -71,18 +69,18 @@ extern int journal_enable_debug;
 #define jbd_debug(f, a...)     /**/
 #endif
 
-extern void * __jbd_kmalloc (const char *where, size_t size, gfp_t flags, int retry);
-extern void * jbd_slab_alloc(size_t size, gfp_t flags);
-extern void jbd_slab_free(void *ptr, size_t size);
+static inline void *jbd_alloc(size_t size, gfp_t flags)
+{
+       return (void *)__get_free_pages(flags, get_order(size));
+}
 
-#define jbd_kmalloc(size, flags) \
-       __jbd_kmalloc(__FUNCTION__, (size), (flags), journal_oom_retry)
-#define jbd_rep_kmalloc(size, flags) \
-       __jbd_kmalloc(__FUNCTION__, (size), (flags), 1)
+static inline void jbd_free(void *ptr, size_t size)
+{
+       free_pages((unsigned long)ptr, get_order(size));
+};
 
 #define JFS_MIN_JOURNAL_BLOCKS 1024
 
-#ifdef __KERNEL__
 
 /**
  * typedef handle_t - The handle_t type represents a single atomic update being performed by some process.
@@ -246,17 +244,7 @@ typedef struct journal_superblock_s
 #include <linux/fs.h>
 #include <linux/sched.h>
 
-#define JBD_ASSERTIONS
-#ifdef JBD_ASSERTIONS
-#define J_ASSERT(assert)                                               \
-do {                                                                   \
-       if (!(assert)) {                                                \
-               printk (KERN_EMERG                                      \
-                       "Assertion failure in %s() at %s:%d: \"%s\"\n", \
-                       __FUNCTION__, __FILE__, __LINE__, # assert);    \
-               BUG();                                                  \
-       }                                                               \
-} while (0)
+#define J_ASSERT(assert)       BUG_ON(!(assert))
 
 #if defined(CONFIG_BUFFER_DEBUG)
 void buffer_assertion_failure(struct buffer_head *bh);
@@ -272,10 +260,6 @@ void buffer_assertion_failure(struct buffer_head *bh);
 #define J_ASSERT_JH(jh, expr)  J_ASSERT(expr)
 #endif
 
-#else
-#define J_ASSERT(assert)       do { } while (0)
-#endif         /* JBD_ASSERTIONS */
-
 #if defined(JBD_PARANOID_IOFAIL)
 #define J_EXPECT(expr, why...)         J_ASSERT(expr)
 #define J_EXPECT_BH(bh, expr, why...)  J_ASSERT_BH(bh, expr)
@@ -362,8 +346,7 @@ static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
 struct jbd_revoke_table_s;
 
 /**
- * struct handle_s - The handle_s type is the concrete type associated with
- *     handle_t.
+ * struct handle_s - this is the concrete type associated with handle_t.
  * @h_transaction: Which compound transaction is this update a part of?
  * @h_buffer_credits: Number of remaining buffers we are allowed to dirty.
  * @h_ref: Reference count on this handle
@@ -371,12 +354,8 @@ struct jbd_revoke_table_s;
  * @h_sync: flag for sync-on-close
  * @h_jdata: flag to force data journaling
  * @h_aborted: flag indicating fatal error on handle
- **/
-
-/* Docbook can't yet cope with the bit fields, but will leave the documentation
- * in so it can be fixed later.
+ * @h_lockdep_map: lockdep info for debugging lock problems
  */
-
 struct handle_s
 {
        /* Which compound transaction is this update a part of? */
@@ -396,6 +375,10 @@ struct handle_s
        unsigned int    h_sync:         1;      /* sync-on-close */
        unsigned int    h_jdata:        1;      /* force data journaling */
        unsigned int    h_aborted:      1;      /* fatal error on handle */
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+       struct lockdep_map      h_lockdep_map;
+#endif
 };
 
 
@@ -446,6 +429,8 @@ struct transaction_s
        /*
         * Transaction's current state
         * [no locking - only kjournald alters this]
+        * [j_list_lock] guards transition of a transaction into T_FINISHED
+        * state and subsequent call of __journal_drop_transaction()
         * FIXME: needs barriers
         * KLUDGE: [use j_state_lock]
         */
@@ -565,8 +550,7 @@ struct transaction_s
 };
 
 /**
- * struct journal_s - The journal_s type is the concrete type associated with
- *     journal_t.
+ * struct journal_s - this is the concrete type associated with journal_t.
  * @j_flags:  General journaling state flags
  * @j_errno:  Is there an outstanding uncleared error on the journal (from a
  *     prior abort)?
@@ -839,7 +823,6 @@ struct journal_s
  */
 
 /* Filing buffers */
-extern void __journal_temp_unlink_buffer(struct journal_head *jh);
 extern void journal_unfile_buffer(journal_t *, struct journal_head *);
 extern void __journal_unfile_buffer(struct journal_head *);
 extern void __journal_refile_buffer(struct journal_head *);
@@ -930,7 +913,6 @@ extern int     journal_recover    (journal_t *journal);
 extern int        journal_wipe       (journal_t *, int);
 extern int        journal_skip_recovery        (journal_t *);
 extern void       journal_update_superblock    (journal_t *, int);
-extern void       __journal_abort_hard (journal_t *);
 extern void       journal_abort      (journal_t *, int);
 extern int        journal_errno      (journal_t *);
 extern void       journal_ack_err    (journal_t *);
@@ -949,7 +931,7 @@ void journal_put_journal_head(struct journal_head *jh);
 /*
  * handle management
  */
-extern kmem_cache_t *jbd_handle_cache;
+extern struct kmem_cache *jbd_handle_cache;
 
 static inline handle_t *jbd_alloc_handle(gfp_t gfp_flags)
 {
@@ -977,7 +959,6 @@ extern void    journal_write_revoke_records(journal_t *, transaction_t *);
 extern int     journal_set_revoke(journal_t *, unsigned long, tid_t);
 extern int     journal_test_revoke(journal_t *, unsigned long, tid_t);
 extern void    journal_clear_revoke(journal_t *);
-extern void    journal_brelse_array(struct buffer_head *b[], int n);
 extern void    journal_switch_revoke_table(journal_t *journal);
 
 /*