Attached is a smallish patch for couple trivial sparse warnings in
allnoconfig build and more importantly an "excuses" text file explaining
why the rest have not been fixed.

Basically all of them (with the exception of the one in Andrews tree) need
some serious re-engineering.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>