We dereference bitmap both one line above and one line below this check
rendering this check quite useless.
Spotted by the Coverity checker.
Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Alasdair G Kergon <agk@redhat.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>