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* MFC r314651,r318439,r318440:ngie2017-05-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | r314651: sys/modules: normalize .CURDIR-relative paths to SRCTOP This simplifies make output/logic Tested with: `cd sys/modules; make ALL_MODULES=` on amd64 r318439: Normalize .PATH on SRCTOP This will help Jenkins dedupe 9 warnings between the static build and the module build of ipsec(4). Missed in SRCTOP conversion in r314651. MFC with: r314651 r318440: Normalize SYSDIR on SRCTOP instead of .CURDIR This is being done to simplify pathing for CFLAGS and source files.
* Add a very simple and small GEOM class - ZERO.pjd2005-07-251-0/+8
It creates very huge provider (41PB) /dev/gzero. On BIO_READ request it zero-fills bio_data and on BIO_WRITE it does nothing. You can also set kern.geom.zero.clear sysctl to 0 to do nothing even for BIO_READ. I'm using it for performance testing where it is very helpful. MFC after: 3 days
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