1046  * Update information in journal structure and in on disk journal superblock
1294  * superblock as being NULL to prevent the journal destroy from writing
1295  * back a bogus superblock.
1305  * Check the superblock for a given journal, performing initial
1316 		printk(KERN_WARNING "JBD2: no valid journal superblock found\n");  in journal_check_superblock()
1322 		printk(KERN_WARNING "JBD2: unrecognised superblock format ID\n");  in journal_check_superblock()
1340 	 * If this is a V2 superblock, then we have to check the  in journal_check_superblock()
1385 		/* Check superblock checksum */  in journal_check_superblock()
1454  * Load the on-disk journal superblock and read the key fields into the
1468 		pr_err("%s: Cannot read journal superblock\n", __func__);  in journal_load_superblock()
1516  * superblock and initialize the journal_t object.
1675 		pr_err("%s: Cannot locate journal superblock\n", __func__);  in jbd2_journal_init_inode()
1752 	 * no recovery (s_start == 0), then we can safely defer the superblock  in journal_reset()
1757 		jbd2_debug(1, "JBD2: Skipping superblock update on recovered sb "  in journal_reset()
1808 		 * superblock failed.  This could happen because the  in jbd2_write_superblock()
1815 		       "for journal superblock update for %s.\n",  in jbd2_write_superblock()
1830 		printk(KERN_ERR "JBD2: I/O error when updating journal superblock for %s.\n",  in jbd2_write_superblock()
1846  * Update a journal's superblock information about log tail and write it to
1865 	jbd2_debug(1, "JBD2: updating superblock (start %lu, seq %u)\n",  in jbd2_journal_update_sb_log_tail()
1890  * Update a journal's dynamic superblock fields to show that journal is empty.
1891  * Write updated superblock to disk waiting for IO to complete.
1932  * __jbd2_journal_erase() - Discard or zeroout journal blocks (excluding superblock)
2034  * Update a journal's errno.  Write updated superblock to disk waiting for IO
2046 	jbd2_debug(1, "JBD2: updating superblock error (errno %d)\n", errcode);  in jbd2_journal_update_sb_errno()
2086 	 * reinitialise the dynamic contents of the superblock in memory  in jbd2_journal_load()
2277  * jbd2_journal_set_features() - Mark a given journal feature in the superblock
2284  * superblock.  Returns true if the requested features could be set.
2328 	/* If enabling v3 checksums, update superblock and precompute seed */  in jbd2_journal_set_features()
2337 	/* If enabling v1 checksums, downgrade superblock */  in jbd2_journal_set_features()
2362  * 				    superblock
2369  * superblock.
2459 	 * This sets s_start==0 in the underlying superblock, which is  in jbd2_journal_flush()
2460 	 * the magic code for a fully-recovered superblock.  Any future  in jbd2_journal_flush()
2549  * which will be recorded (if possible) in the journal superblock.  This
2565 	 * superblock.  in jbd2_journal_abort()