Fixup compilation and enable dtrace support for mips64

[• lidl]

Summary

As it stands right now, one cannot compile the dtrace
modules for mips64. With this patch, the modules
compile, and can be loaded into the kernel via
kldload (or just by running 'dtrace -l').

While the dtrace functionality does not currently work,
this is a useful stepping stone to further explore getting
it to work.

[emaste]

sys/modules/dtrace/dtraceall/dtraceall.c

73–74

Does __mips64__ actually get defined? AFAIK __mips__ is on both 32- and 64-bit so it wouldn't make a difference.

[• lidl]

sys/modules/dtrace/dtraceall/dtraceall.c

73–74

Heh. You are correct, gcc (4.2.1, the in-tree one) only defines
mips64 not mips64__.

I will remove the mips64 code.

[• lidl]

Address emaste's comment about mips64

[gnn]

LGTM