[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.

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/logfs/gc.c b/fs/logfs/gc.c
index b3656c44190e..92949f95a901 100644
--- a/fs/logfs/gc.c
+++ b/fs/logfs/gc.c
@@ -469,7 +469,7 @@ static void __logfs_gc_pass(struct super_block *sb, int target)
 
                 /* 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 @@ void logfs_gc_pass(struct super_block *sb)
          */
         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);
 }