return skey;
}
+extern unsigned long max_pfn;
+
+static inline int pfn_valid(unsigned long pfn)
+{
+ unsigned long dummy;
+ int ccode;
+
+ if (pfn >= max_pfn)
+ return 0;
+
+ asm volatile(
+ " lra %0,0(%2)\n"
+ " ipm %1\n"
+ " srl %1,28\n"
+ : "=d" (dummy), "=d" (ccode)
+ : "a" (pfn << PAGE_SHIFT)
+ : "cc");
+ return !ccode;
+}
+
#endif /* !__ASSEMBLY__ */
/* to align the pointer to the (next) page boundary */
#define __va(x) (void *)(unsigned long)(x)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
-
-#define pfn_valid(pfn) ((pfn) < max_mapnr)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \