[PATCH] prio_tree: move general code from mm/ to lib/

Last but not least, move the general prio_tree code from mm/ to lib/.  This
patch also duplicates some macros, which are used in the VMA code for
debugging purposes, so we can't properly separate them yet.

Note that this patch conflicts with a patch in 2.6.10-rc3-mm1
(frv-better-mmap-support-in-uclinux.patch), which removes mm/prio_tree in
systems without an MMU.  Not making that other patch provide a dummy for
prio_tree_init should resolve the conflict.  (That's just from reading the
patch - I haven't actually tried this.)
Signed-off-by: Werner Almesberger <werner@almesberger.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

lib/Makefile

@@ -5,7 +5,7 @@
 lib-y := errno.o ctype.o string.o vsprintf.o cmdline.o \
 	 bust_spinlocks.o rbtree.o radix-tree.o dump_stack.o \
 	 kobject.o kref.o idr.o div64.o parser.o int_sqrt.o \
-	 bitmap.o extable.o kobject_uevent.o
+	 bitmap.o extable.o kobject_uevent.o prio_tree.o
 
 ifeq ($(CONFIG_DEBUG_KOBJECT),y)
 CFLAGS_kobject.o += -DDEBUG