X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=fs%2Fext4%2Fmballoc.c;h=49e444b51a0c8044108036811d1ea43716516f87;hb=b5cb316cdf3a3f5f6125412b0f6065185240cfdc;hp=efa111a7606dd13d62215694d5a2278a1cfd50c0;hpb=74177f55b70e2f2be770dd28684dd6d17106a4ba;p=mirror_ubuntu-bionic-kernel.git

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index efa111a7606d..49e444b51a0c 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1266,6 +1266,7 @@ static void ext4_mb_unload_buddy(struct ext4_buddy *e4b)
 static int mb_find_order_for_block(struct ext4_buddy *e4b, int block)
 {
 	int order = 1;
+	int bb_incr = 1 << (e4b->bd_blkbits - 1);
 	void *bb;
 
 	BUG_ON(e4b->bd_bitmap == e4b->bd_buddy);
@@ -1278,7 +1279,8 @@ static int mb_find_order_for_block(struct ext4_buddy *e4b, int block)
 			/* this block is part of buddy of order 'order' */
 			return order;
 		}
-		bb += 1 << (e4b->bd_blkbits - order);
+		bb += bb_incr;
+		bb_incr >>= 1;
 		order++;
 	}
 	return 0;