jbd2: Avoid possible NULL dereference in jbd2_journal_begin_ordered_truncate()

[pandora-kernel.git] / include / linux / jbd2.h

diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 3dd2090..df4137e 100644 (file)
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -308,7 +308,8 @@ void buffer_assertion_failure(struct buffer_head *bh);
                int val = (expr);                                            \
                if (!val) {                                                  \
                        printk(KERN_ERR                                      \
-                               "EXT3-fs unexpected failure: %s;\n",# expr); \
+                              "JBD2 unexpected failure: %s: %s;\n",         \
+                              __func__, #expr);                             \
                        printk(KERN_ERR why "\n");                           \
                }                                                            \
                val;                                                         \
@@ -329,6 +330,7 @@ enum jbd_state_bits {
        BH_State,               /* Pins most journal_head state */
        BH_JournalHead,         /* Pins bh->b_private and jh->b_bh */
        BH_Unshadow,            /* Dummy bit, for BJ_Shadow wakeup filtering */
+       BH_JBDPrivateStart,     /* First bit available for private use by FS */
 };
 
 BUFFER_FNS(JBD, jbd)
@@ -850,7 +852,8 @@ struct journal_s
         */
        struct block_device     *j_dev;
        int                     j_blocksize;
-       unsigned long long              j_blk_offset;
+       unsigned long long      j_blk_offset;
+       char                    j_devname[BDEVNAME_SIZE+24];
 
        /*
         * Device which holds the client fs.  For internal journal this will be
@@ -1072,7 +1075,8 @@ extern int           jbd2_journal_clear_err  (journal_t *);
 extern int        jbd2_journal_bmap(journal_t *, unsigned long, unsigned long long *);
 extern int        jbd2_journal_force_commit(journal_t *);
 extern int        jbd2_journal_file_inode(handle_t *handle, struct jbd2_inode *inode);
-extern int        jbd2_journal_begin_ordered_truncate(struct jbd2_inode *inode, loff_t new_size);
+extern int        jbd2_journal_begin_ordered_truncate(journal_t *journal,
+                               struct jbd2_inode *inode, loff_t new_size);
 extern void       jbd2_journal_init_jbd_inode(struct jbd2_inode *jinode, struct inode *inode);
 extern void       jbd2_journal_release_jbd_inode(journal_t *journal, struct jbd2_inode *jinode);