The attached patch fixes a bug introduced into do_generic_mapping_read() by
which a file pointer becomes required.  I'd arranged things so that the
file pointer was optional so that I could call the function directly on an
inode.
Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>