#include <linux/fs.h>
 #include <linux/time.h>
 #include <linux/ext4_jbd2.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
 #include <linux/highuid.h>
 #include <linux/pagemap.h>
 #include <linux/quotaops.h>
 
                        if (option < 0)
                                return 0;
                        if (option == 0)
-                               option = JBD_DEFAULT_MAX_COMMIT_AGE;
+                               option = JBD2_DEFAULT_MAX_COMMIT_AGE;
                        sbi->s_commit_interval = HZ * option;
                        break;
                case Opt_data_journal:
 
                                   unsigned long long block)
 {
        tag->t_blocknr = cpu_to_be32(block & (u32)~0);
-       if (tag_bytes > JBD_TAG_SIZE32)
+       if (tag_bytes > JBD2_TAG_SIZE32)
                tag->t_blocknr_high = cpu_to_be32((block >> 31) >> 1);
 }
 
 
        spin_lock_init(&journal->j_list_lock);
        spin_lock_init(&journal->j_state_lock);
 
-       journal->j_commit_interval = (HZ * JBD_DEFAULT_MAX_COMMIT_AGE);
+       journal->j_commit_interval = (HZ * JBD2_DEFAULT_MAX_COMMIT_AGE);
 
        /* The journal is marked for error until we succeed with recovery! */
        journal->j_flags = JBD2_ABORT;
 size_t journal_tag_bytes(journal_t *journal)
 {
        if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_64BIT))
-               return JBD_TAG_SIZE64;
+               return JBD2_TAG_SIZE64;
        else
-               return JBD_TAG_SIZE32;
+               return JBD2_TAG_SIZE32;
 }
 
 /*
 {
 #ifdef CONFIG_JBD2_DEBUG
        atomic_dec(&nr_journal_heads);
-       memset(jh, JBD_POISON_FREE, sizeof(*jh));
+       memset(jh, JBD2_POISON_FREE, sizeof(*jh));
 #endif
        kmem_cache_free(jbd2_journal_head_cache, jh);
 }
 
 static inline unsigned long long read_tag_block(int tag_bytes, journal_block_tag_t *tag)
 {
        unsigned long long block = be32_to_cpu(tag->t_blocknr);
-       if (tag_bytes > JBD_TAG_SIZE32)
+       if (tag_bytes > JBD2_TAG_SIZE32)
                block |= (u64)be32_to_cpu(tag->t_blocknr_high) << 32;
        return block;
 }
 
                if (bh)
                        BUFFER_TRACE(bh, "found on hash");
        }
-#ifdef JBD_EXPENSIVE_CHECKING
+#ifdef JBD2_EXPENSIVE_CHECKING
        else {
                struct buffer_head *bh2;
 
                }
        }
 
-#ifdef JBD_EXPENSIVE_CHECKING
+#ifdef JBD2_EXPENSIVE_CHECKING
        /* There better not be one left behind by now! */
        record = find_revoke_record(journal, bh->b_blocknr);
        J_ASSERT_JH(jh, record == NULL);
 
  * Ext4-specific journaling extensions.
  */
 
-#ifndef _LINUX_EXT4_JBD_H
-#define _LINUX_EXT4_JBD_H
+#ifndef _LINUX_EXT4_JBD2_H
+#define _LINUX_EXT4_JBD2_H
 
 #include <linux/fs.h>
 #include <linux/jbd2.h>
        return 0;
 }
 
-#endif /* _LINUX_EXT4_JBD_H */
+#endif /* _LINUX_EXT4_JBD2_H */
 
  * filesystem journaling support.
  */
 
-#ifndef _LINUX_JBD_H
-#define _LINUX_JBD_H
+#ifndef _LINUX_JBD2_H
+#define _LINUX_JBD2_H
 
 /* Allow this file to be included directly into e2fsprogs */
 #ifndef __KERNEL__
 #define journal_oom_retry 1
 
 /*
- * Define JBD_PARANIOD_IOFAIL to cause a kernel BUG() if ext3 finds
+ * Define JBD2_PARANIOD_IOFAIL to cause a kernel BUG() if ext4 finds
  * certain classes of error which can occur due to failed IOs.  Under
- * normal use we want ext3 to continue after such errors, because
+ * normal use we want ext4 to continue after such errors, because
  * hardware _can_ fail, but for debugging purposes when running tests on
  * known-good hardware we may want to trap these errors.
  */
-#undef JBD_PARANOID_IOFAIL
+#undef JBD2_PARANOID_IOFAIL
 
 /*
  * The default maximum commit age, in seconds.
  */
-#define JBD_DEFAULT_MAX_COMMIT_AGE 5
+#define JBD2_DEFAULT_MAX_COMMIT_AGE 5
 
 #ifdef CONFIG_JBD2_DEBUG
 /*
- * Define JBD_EXPENSIVE_CHECKING to enable more expensive internal
+ * Define JBD2_EXPENSIVE_CHECKING to enable more expensive internal
  * consistency checks.  By default we don't do this unless
  * CONFIG_JBD2_DEBUG is on.
  */
-#define JBD_EXPENSIVE_CHECKING
+#define JBD2_EXPENSIVE_CHECKING
 extern u8 jbd2_journal_enable_debug;
 
 #define jbd_debug(n, f, a...)                                          \
        __be32          t_blocknr_high; /* most-significant high 32bits. */
 } journal_block_tag_t;
 
-#define JBD_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high))
-#define JBD_TAG_SIZE64 (sizeof(journal_block_tag_t))
+#define JBD2_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high))
+#define JBD2_TAG_SIZE64 (sizeof(journal_block_tag_t))
 
 /*
  * The revoke descriptor: used on disk to describe a series of blocks to
 #include <linux/fs.h>
 #include <linux/sched.h>
 
-#define JBD_ASSERTIONS
-#ifdef JBD_ASSERTIONS
+#define JBD2_ASSERTIONS
+#ifdef JBD2_ASSERTIONS
 #define J_ASSERT(assert)                                               \
 do {                                                                   \
        if (!(assert)) {                                                \
 
 #else
 #define J_ASSERT(assert)       do { } while (0)
-#endif         /* JBD_ASSERTIONS */
+#endif         /* JBD2_ASSERTIONS */
 
-#if defined(JBD_PARANOID_IOFAIL)
+#if defined(JBD2_PARANOID_IOFAIL)
 #define J_EXPECT(expr, why...)         J_ASSERT(expr)
 #define J_EXPECT_BH(bh, expr, why...)  J_ASSERT_BH(bh, expr)
 #define J_EXPECT_JH(jh, expr, why...)  J_ASSERT_JH(jh, expr)
 
 #endif /* __KERNEL__ */
 
-#endif /* _LINUX_JBD_H */
+#endif /* _LINUX_JBD2_H */
 
  */
 
 /********** fs/jbd/journal.c **********/
-#define JBD_POISON_FREE        0x5b
+#define JBD_POISON_FREE                0x5b
+#define JBD2_POISON_FREE       0x5c
 
 /********** drivers/base/dmapool.c **********/
 #define        POOL_POISON_FREED       0xa7    /* !inuse */