This will allow multiple consumers of the coverage data to be compiled
into the kernel together. The only requirement is only one can be
registered at a given point in time, however it is expected they will
only register when the coverage data is needed.
A new kernel conflig option COVERAGE is added. This will allow kcov to
become a module that can be loaded as needed, or compiled into the
kernel.
While here clean up the #include style a little.
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D18955
It is useful to enter kdb with an escape sequence.
While here move the USB_DEBUG with the others debug options and define
nooptions USB_DEBUG for GENERIC-NODEBUG
don't need the extra debug facilities. Copied from the amd64
configuration of the same name.
Submitted by: Nikolai Lifanov
Reviewed by: emaste
MFC after: 2 weeks
