K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2007-04-26T08:56:56.000000Z
K 7
svn:log
V 531
Allow the dounmount() to proceed even for doomed coveredvp.

In dounmount(), before or while vn_lock(coveredvp) is called, coveredvp
vnode may be VI_DOOMED due to one of the following:
- other thread finished unmount and vput()ed it, and vnode was chosen
  for recycling, while vn_lock() slept;
- forced unmount of the coveredvp->v_mount fs.
In the first case, next check for changed v_mountedhere or mnt_gen counter
would be successfull. In the second case, the unmount shall be allowed.

Submitted by:	sobomax
MFC after:	2 weeks

END