[LogFS] Only write journal if dirty
This prevents unnecessary journal writes. More importantly it prevents
an oops due to a journal write on failed mount.
diff --git a/fs/logfs/gc.c b/fs/logfs/gc.c
index b3656c4..92949f9 100644
--- a/fs/logfs/gc.c
+++ b/fs/logfs/gc.c
@@ -469,7 +469,7 @@
/* Sync in-memory state with on-medium state in case they
* diverged */
- logfs_write_anchor(super->s_master_inode);
+ logfs_write_anchor(sb);
round += logfs_scan_some(sb);
if (no_free_segments(sb) >= target)
goto write_alias;
@@ -613,8 +613,8 @@
*/
if (super->s_dirty_used_bytes + super->s_dirty_free_bytes
+ LOGFS_MAX_OBJECTSIZE >= super->s_free_bytes)
- logfs_write_anchor(super->s_master_inode);
- __logfs_gc_pass(sb, logfs_super(sb)->s_total_levels);
+ logfs_write_anchor(sb);
+ __logfs_gc_pass(sb, super->s_total_levels);
logfs_wl_pass(sb);
logfs_journal_wl_pass(sb);
}