tree 8264f920a1f1a83e9cb0247ffe9390a7b6332852
parent 9a896c9a48ac6704c0ce8ee081b836644d0afe40
author Nikanth Karthikesan <knikanth@suse.de> 1238716606 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1238724289 -0700

vfs: check bh->b_blocknr only if BH_Mapped is set

Check bh->b_blocknr only if BH_Mapped is set.

akpm: I doubt if b_blocknr is ever uninitialised here, but it could
conceivably cause a problem if we're doing a lookup for block zero.

Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>