From: NeilBrown All that is missing the the function pointers in raid4_pers. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton --- drivers/md/raid5.c | 4 ++++ 1 file changed, 4 insertions(+) diff -puN drivers/md/raid5.c~md-allow-raid4-arrays-to-be-reshaped drivers/md/raid5.c --- a/drivers/md/raid5.c~md-allow-raid4-arrays-to-be-reshaped +++ a/drivers/md/raid5.c @@ -4104,6 +4104,10 @@ static struct mdk_personality raid4_pers .spare_active = raid5_spare_active, .sync_request = sync_request, .resize = raid5_resize, +#ifdef CONFIG_MD_RAID5_RESHAPE + .check_reshape = raid5_check_reshape, + .start_reshape = raid5_start_reshape, +#endif .quiesce = raid5_quiesce, }; _