page table handling cleanup

Kill pte_rdprotect(), pte_exprotect(), pte_mkread(), pte_mkexec(), pte_read(),
pte_exec(), and pte_user() except where arch-specific code is making use of
them.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-s390/pgtable.h

@@ -530,14 +530,6 @@ static inline int pte_young(pte_t pte)
 	return 0;
 }
 
-static inline int pte_read(pte_t pte)
-{
-	/* All pages are readable since we don't use the fetch
-	 * protection bit in the storage key.
-	 */
-	return 1;
-}
-
 /*
  * pgd/pmd/pte modification functions
  */