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Lines 1351-1368
void jbd2_journal_update_sb_log_tail(journal_t *journal, tid_t tail_tid,
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| 1351 |
static void jbd2_mark_journal_empty(journal_t *journal) |
1351 |
static void jbd2_mark_journal_empty(journal_t *journal) |
| 1352 |
{ |
1352 |
{ |
| 1353 |
journal_superblock_t *sb = journal->j_superblock; |
1353 |
journal_superblock_t *sb = journal->j_superblock; |
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1354 |
__be32 new_tail_sequence; |
| 1354 |
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1355 |
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| 1355 |
BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex)); |
1356 |
BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex)); |
| 1356 |
read_lock(&journal->j_state_lock); |
1357 |
read_lock(&journal->j_state_lock); |
| 1357 |
/* Is it already empty? */ |
1358 |
new_tail_sequence = cpu_to_be32(journal->j_tail_sequence); |
| 1358 |
if (sb->s_start == 0) { |
1359 |
/* Nothing to do? */ |
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1360 |
if (sb->s_start == 0 && sb->s_sequence == new_tail_sequence) { |
| 1359 |
read_unlock(&journal->j_state_lock); |
1361 |
read_unlock(&journal->j_state_lock); |
| 1360 |
return; |
1362 |
return; |
| 1361 |
} |
1363 |
} |
| 1362 |
jbd_debug(1, "JBD2: Marking journal as empty (seq %d)\n", |
1364 |
jbd_debug(1, "JBD2: Marking journal as empty (seq %d)\n", |
| 1363 |
journal->j_tail_sequence); |
1365 |
journal->j_tail_sequence); |
| 1364 |
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1366 |
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| 1365 |
sb->s_sequence = cpu_to_be32(journal->j_tail_sequence); |
1367 |
sb->s_sequence = new_tail_sequence; |
| 1366 |
sb->s_start = cpu_to_be32(0); |
1368 |
sb->s_start = cpu_to_be32(0); |
| 1367 |
read_unlock(&journal->j_state_lock); |
1369 |
read_unlock(&journal->j_state_lock); |
