add resync speed control for dm-raid1

Hi,

These patches are used to add resync speed control for dm-raid1. The second and third patch provide support for user-space tool dmsetup.

Guangliang Zhao (3):
dm raid1: add resync speed control for dm-raid1
dm raid1: add interface to set resync speed
dm raid1: add interface to get resync speed

 drivers/md/dm-raid1.c |   93 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 90 insertions(+), 3 deletions(-)

1.7.10.4