K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2019-12-27T11:26:12.335620Z
K 7
svn:log
V 600
vfs: remove production kernel checks and mp == NULL support from vdrop

1. The only place in the tree which calls getnewvnode with mp == NULL does it
for vp_crossmp which will never execute this codepath. Any vnode which legally
has ->v_mount == NULL is also doomed, which once more wont execute this code.
2. Remove an assertion for v_holdcnt from production kernels. It gets taken care
of by refcount macros in debug kernels.

Any code which would want to pass NULL mp can construct a fake one instead.

Reviewed by:	kib (previous version)
Differential Revision:	https://reviews.freebsd.org/D22722

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