prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts

... and equivalent is needed in 3.12; it's broken there as well

Signed-off-by: Al Viro <de609eb4d5d70b1d38ec6642adbfc33a2781f63c@zeniv.linux.org.uk>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs