tree 0c6e992844c24162838013caa4f4f3356d6594dd
parent 9dc8c89dfbbac5546101379d8d2aa0fa30d39888
author Mathias Krause <minipli@googlemail.com> 1383478588 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1383504791 -0800

ipc, msg: forbid negative values for "msg{max,mnb,mni}"

Negative message lengths make no sense -- so don't do negative queue
lenghts or identifier counts. Prevent them from getting negative.

Also change the underlying data types to be unsigned to avoid hairy
surprises with sign extensions in cases where those variables get
evaluated in unsigned expressions with bigger data types, e.g size_t.

In case a user still wants to have "unlimited" sizes she could just use
INT_MAX instead.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>