[PATCH] OOM killer meets userspace headers

Despite mm.h is not being exported header, it does contain one thing
which is part of userspace ABI -- value disabling OOM killer for given
process. So,
a) create and export include/linux/oom.h
b) move OOM_DISABLE define there.
c) turn bounding values of /proc/$PID/oom_adj into defines and export
   them too.

Note: mass __KERNEL__ removal will be done later.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 5114ff1..a1155a2 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -120,6 +120,7 @@
 header-y += nfs2.h
 header-y += nfs4_mount.h
 header-y += nfs_mount.h
+header-y += oom.h
 header-y += param.h
 header-y += pci_ids.h
 header-y += pci_regs.h