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-rw-r--r--fs/jbd/checkpoint.c30
1 files changed, 15 insertions, 15 deletions
diff --git a/fs/jbd/checkpoint.c b/fs/jbd/checkpoint.c
index d0685596e5a6..961ada28db5e 100644
--- a/fs/jbd/checkpoint.c
+++ b/fs/jbd/checkpoint.c
@@ -1,6 +1,6 @@
1/* 1/*
2 * linux/fs/checkpoint.c 2 * linux/fs/checkpoint.c
3 * 3 *
4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1999 4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1999
5 * 5 *
6 * Copyright 1999 Red Hat Software --- All Rights Reserved 6 * Copyright 1999 Red Hat Software --- All Rights Reserved
@@ -9,8 +9,8 @@
9 * the terms of the GNU General Public License, version 2, or at your 9 * the terms of the GNU General Public License, version 2, or at your
10 * option, any later version, incorporated herein by reference. 10 * option, any later version, incorporated herein by reference.
11 * 11 *
12 * Checkpoint routines for the generic filesystem journaling code. 12 * Checkpoint routines for the generic filesystem journaling code.
13 * Part of the ext2fs journaling system. 13 * Part of the ext2fs journaling system.
14 * 14 *
15 * Checkpointing is the process of ensuring that a section of the log is 15 * Checkpointing is the process of ensuring that a section of the log is
16 * committed fully to disk, so that that portion of the log can be 16 * committed fully to disk, so that that portion of the log can be
@@ -226,7 +226,7 @@ __flush_batch(journal_t *journal, struct buffer_head **bhs, int *batch_count)
226 * Try to flush one buffer from the checkpoint list to disk. 226 * Try to flush one buffer from the checkpoint list to disk.
227 * 227 *
228 * Return 1 if something happened which requires us to abort the current 228 * Return 1 if something happened which requires us to abort the current
229 * scan of the checkpoint list. 229 * scan of the checkpoint list.
230 * 230 *
231 * Called with j_list_lock held and drops it if 1 is returned 231 * Called with j_list_lock held and drops it if 1 is returned
232 * Called under jbd_lock_bh_state(jh2bh(jh)), and drops it 232 * Called under jbd_lock_bh_state(jh2bh(jh)), and drops it
@@ -270,7 +270,7 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
270 * possibly block, while still holding the journal lock. 270 * possibly block, while still holding the journal lock.
271 * We cannot afford to let the transaction logic start 271 * We cannot afford to let the transaction logic start
272 * messing around with this buffer before we write it to 272 * messing around with this buffer before we write it to
273 * disk, as that would break recoverability. 273 * disk, as that would break recoverability.
274 */ 274 */
275 BUFFER_TRACE(bh, "queue"); 275 BUFFER_TRACE(bh, "queue");
276 get_bh(bh); 276 get_bh(bh);
@@ -293,7 +293,7 @@ static int __process_buffer(journal_t *journal, struct journal_head *jh,
293 * Perform an actual checkpoint. We take the first transaction on the 293 * Perform an actual checkpoint. We take the first transaction on the
294 * list of transactions to be checkpointed and send all its buffers 294 * list of transactions to be checkpointed and send all its buffers
295 * to disk. We submit larger chunks of data at once. 295 * to disk. We submit larger chunks of data at once.
296 * 296 *
297 * The journal should be locked before calling this function. 297 * The journal should be locked before calling this function.
298 */ 298 */
299int log_do_checkpoint(journal_t *journal) 299int log_do_checkpoint(journal_t *journal)
@@ -304,10 +304,10 @@ int log_do_checkpoint(journal_t *journal)
304 304
305 jbd_debug(1, "Start checkpoint\n"); 305 jbd_debug(1, "Start checkpoint\n");
306 306
307 /* 307 /*
308 * First thing: if there are any transactions in the log which 308 * First thing: if there are any transactions in the log which
309 * don't need checkpointing, just eliminate them from the 309 * don't need checkpointing, just eliminate them from the
310 * journal straight away. 310 * journal straight away.
311 */ 311 */
312 result = cleanup_journal_tail(journal); 312 result = cleanup_journal_tail(journal);
313 jbd_debug(1, "cleanup_journal_tail returned %d\n", result); 313 jbd_debug(1, "cleanup_journal_tail returned %d\n", result);
@@ -385,9 +385,9 @@ out:
385 * we have already got rid of any since the last update of the log tail 385 * we have already got rid of any since the last update of the log tail
386 * in the journal superblock. If so, we can instantly roll the 386 * in the journal superblock. If so, we can instantly roll the
387 * superblock forward to remove those transactions from the log. 387 * superblock forward to remove those transactions from the log.
388 * 388 *
389 * Return <0 on error, 0 on success, 1 if there was nothing to clean up. 389 * Return <0 on error, 0 on success, 1 if there was nothing to clean up.
390 * 390 *
391 * Called with the journal lock held. 391 * Called with the journal lock held.
392 * 392 *
393 * This is the only part of the journaling code which really needs to be 393 * This is the only part of the journaling code which really needs to be
@@ -404,8 +404,8 @@ int cleanup_journal_tail(journal_t *journal)
404 unsigned long blocknr, freed; 404 unsigned long blocknr, freed;
405 405
406 /* OK, work out the oldest transaction remaining in the log, and 406 /* OK, work out the oldest transaction remaining in the log, and
407 * the log block it starts at. 407 * the log block it starts at.
408 * 408 *
409 * If the log is now empty, we need to work out which is the 409 * If the log is now empty, we need to work out which is the
410 * next transaction ID we will write, and where it will 410 * next transaction ID we will write, and where it will
411 * start. */ 411 * start. */
@@ -558,7 +558,7 @@ out:
558 return ret; 558 return ret;
559} 559}
560 560
561/* 561/*
562 * journal_remove_checkpoint: called after a buffer has been committed 562 * journal_remove_checkpoint: called after a buffer has been committed
563 * to disk (either by being write-back flushed to disk, or being 563 * to disk (either by being write-back flushed to disk, or being
564 * committed to the log). 564 * committed to the log).
@@ -636,7 +636,7 @@ out:
636 * Called with the journal locked. 636 * Called with the journal locked.
637 * Called with j_list_lock held. 637 * Called with j_list_lock held.
638 */ 638 */
639void __journal_insert_checkpoint(struct journal_head *jh, 639void __journal_insert_checkpoint(struct journal_head *jh,
640 transaction_t *transaction) 640 transaction_t *transaction)
641{ 641{
642 JBUFFER_TRACE(jh, "entry"); 642 JBUFFER_TRACE(jh, "entry");
@@ -658,7 +658,7 @@ void __journal_insert_checkpoint(struct journal_head *jh,
658 658
659/* 659/*
660 * We've finished with this transaction structure: adios... 660 * We've finished with this transaction structure: adios...
661 * 661 *
662 * The transaction must have no links except for the checkpoint by this 662 * The transaction must have no links except for the checkpoint by this
663 * point. 663 * point.
664 * 664 *