md: introduce link/unlink_rdev() helpers
authorNamhyung Kim <namhyung@gmail.com>
Wed, 27 Jul 2011 01:00:36 +0000 (11:00 +1000)
committerNeilBrown <neilb@suse.de>
Wed, 27 Jul 2011 01:00:36 +0000 (11:00 +1000)
There are places where sysfs links to rdev are handled
in a same way. Add the helper functions to consolidate
them.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

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