Do not export asm/page.h during make headers_install.  This removes PAGE_SIZE
from userspace headers.

Signed-off-by: Kirill A. Shutemov <k.shutemov@gmail.com>
Reviewed-by: David Woodhouse <dwmw2@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

a) registers.h is really needed there
b) include of asm-generic/termios should be under __KERNEL__
c) includes of asm-generic/{memory_model,page} should be under
   __KERNEL (nothing in there that would work in userland)
d) a lot of stuff in ptrace.h should be under __KERNEL__.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

These include nothing more than the basic set of files listed in
asm-generic/Kbuild.asm. Any extra arch-specific files will need to be
added.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>