Multiple format -related warnings arise from size_t issues.  This patch
peppers the seq_printf()'s with 'z' qualifiers and casts to silence them all.
Signed-off-by: Wililam Irwin <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>