K 10
svn:author
V 8
rmacklem
K 8
svn:date
V 27
2020-03-22T18:18:30.275994Z
K 7
svn:log
V 452
Fix an NFS mount attempt where VFS_STATFS() fails.

r353150 added mnt_rootvnode and this seems to have broken NFS mounts when the
VFS_STATFS() called just after VFS_MOUNT() returns an error.
Then the code calls VFS_UNMOUNT(), which calls vflush(), which returns EBUSY.
Then the thread get stuck sleeping on "mntref" in vfs_mount_destroy().
This patch fixes this problem.

Reviewed by:	kib, mjg
Differential Revision:	https://reviews.freebsd.org/D24022

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