K 10
svn:author
V 8
cperciva
K 8
svn:date
V 27
2010-12-31T17:40:30.898415Z
K 7
svn:log
V 348
Make i386_set_ldt work on i386/XEN, step 3/5.

Synchronize reality with comment: The user_ldt_alloc function is supposed to
return with dt_lock held.  Due to broken locking in i386/xen/pmap.c, we drop
dt_lock during the call to pmap_map_readonly and then pick it up again; this
can be removed once the Xen pmap locking is fixed.

MFC after:	3 days

END