md: wakeup thread upon rdev_dec_pending()
md: wakeup thread upon rdev_dec_pending()

After each call to rdev_dec_pending() we should wakeup the
md thread if the device is found to be faulty.
Otherwise we'll incur heavy delays on failing devices.

Signed-off-by: Neil Brown <157813f2d9fadcc6e858046491c8631ad83325ba@suse.de>
Signed-off-by: Hannes Reinecke <b0d1e9e4a4e27620745ff49be9000da3174a4cc6@suse.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs