K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2019-07-15T21:16:01.273746Z
K 7
svn:log
V 380
Always set td_errno to the error value of a system call.

Early errors prior to a system call did not set td_errno.  This commit
sets td_errno for all errors during syscallenter().  As a result,
syscallret() can now always use td_errno without checking TDP_NERRNO.

Reviewed by:	kib
MFC after:	1 month
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D20898

END