[SPARC64]: Override {pgd,pmd}_addr_end() to handle vaddr hole.

Signed-off-by: David S. Miller <davem@davemloft.net>

include/asm-generic/pgtable.h

@@ -141,10 +141,12 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
  * wrap to 0 only in clear_page_range, __boundary may wrap to 0 throughout.
  */
 
+#ifndef pgd_addr_end
 #define pgd_addr_end(addr, end)						\
 ({	unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK;	\
 	(__boundary - 1 < (end) - 1)? __boundary: (end);		\
 })
+#endif
 
 #ifndef pud_addr_end
 #define pud_addr_end(addr, end)						\

include/asm-sparc64/pgtable.h

@@ -432,6 +432,21 @@ extern int io_remap_page_range(struct vm_area_struct *vma, unsigned long from,
 			       unsigned long offset,
 			       unsigned long size, pgprot_t prot, int space);
 
+/* Override for {pgd,pmd}_addr_end() to deal with the virtual address
+ * space hole.  We simply sign extend bit 43.
+ */
+#define pgd_addr_end(addr, end)						\
+({	unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK;	\
+	__boundary = ((long) (__boundary << 20)) >> 20;			\
+	(__boundary - 1 < (end) - 1)? __boundary: (end);		\
+})
+
+#define pmd_addr_end(addr, end)						\
+({	unsigned long __boundary = ((addr) + PMD_SIZE) & PMD_MASK;	\
+	__boundary = ((long) (__boundary << 20)) >> 20;			\
+	(__boundary - 1 < (end) - 1)? __boundary: (end);		\
+})
+
 #include <asm-generic/pgtable.h>
 
 /* We provide our own get_unmapped_area to cope with VA holes for userland */