K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2017-01-09T23:43:42.223122Z
K 7
svn:log
V 695
MFC 306565,306566: Use timercmp() and timersub() in kdump.

306565:
Use timercmp() and timersub() in kdump.

Previously, kdump used the kernel-only timervalsub() macro which required
defining _KERNEL when including <sys/time.h>.  Now, kdump uses the existing
userland API.  The timercmp() usage to check for a backwards timestamp is
also clearer and simpler than the previous code which checked the result of
the subtraction for a negative value.

While here, take advantage of the 3-arg timersub() to store the subtraction
results in a tempory timeval instead of overwriting the timestamp in the
ktrace record and then having to restore it.

306566:
Don't declare the 'temp' timeval as static.

END