1 files changed, 7 insertions, 0 deletions

diff --git a/fs/befs/super.c b/fs/befs/super.c
index dc13df8de3e8..c36745d2b45f 100644
--- a/fs/befs/super.c
+++ b/fs/befs/super.c
@@ -103,6 +103,13 @@ befs_check_sb(struct super_block *sb)
                 return BEFS_ERR;
         }
 
+
+        /* ag_shift also encodes the same information as blocks_per_ag in a
+         * different way, non-fatal consistency check
+         */
+        if ((1 << befs_sb->ag_shift) != befs_sb->blocks_per_ag)
+                befs_error(sb, "ag_shift disagrees with blocks_per_ag.");
+
         if (befs_sb->log_start != befs_sb->log_end || befs_sb->flags == BEFS_DIRTY) {
                 befs_error(sb, "Filesystem not clean! There are blocks in the "
                            "journal. You must boot into BeOS and mount this volume "