George V. Neville-Neil af463464cf Fix a kernel panic in DTrace's rw_iswriter subroutine.
On FreeBSD the sense of rw_write_held() and rw_iswriter() were reversed,
probably due to a cut and paste error. Using rw_iswriter() would cause
the kernel to panic.

Reviewed by:	markj
MFC after:	2 weeks
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D8718
2016-12-07 07:27:47 +00:00
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