+int sparc64_mmap_check(unsigned long addr, unsigned long len,
+ unsigned long flags)
+{
+ if (test_thread_flag(TIF_32BIT)) {
+ if (len > 0xf0000000UL ||
+ ((flags & MAP_FIXED) && addr > 0xf0000000UL - len))
+ return -EINVAL;
+ } else {
+ if (len > -PAGE_OFFSET ||
+ ((flags & MAP_FIXED) &&
+ addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET))
+ return -EINVAL;
+ }
+
+ return 0;
+}
+