Change the callout to supply -1 to indicate we are not changing
CPU, also add protection against invalid CPU's as well as split c_flags and c_iflags so that if a user plays with the active flag (the one expected to be played with by callers in MPSAFE) without a lock, it won't adversely affect the callout system by causing a corrupt list. This also means that all callers need to use the macros and *not* play with the falgs directly (like netgraph used to). Differential Revision: htts://reviews.freebsd.org/D1894 Reviewed by: .. timed out but looked at by jhb, imp, adrian hselasky tested by hiren and netflix. Sponsored by: Netflix Inc.