K 10
svn:author
V 8
gallatin
K 8
svn:date
V 27
2017-07-06T15:03:54.588345Z
K 7
svn:log
V 370
Simplify UIO_SYSSPACE and UIO_NOCOPY paths in uiomove

Uiomove can only block when the segflag is UIO_USERSPACE,
otherwise we end up just doing a bcopy (or nothing) and
moving cursors. So only emit witness warnings and
set deadlock thread flags in the UIO_USERSPACE case.

Reviewed by:	kib
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D11489

END