1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 293fa0677fba..3cbf3cfff4f0 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -480,6 +480,15 @@ extern int func_ptr_is_kernel_text(void *ptr);
 
 unsigned long int_sqrt(unsigned long);
 
+#if BITS_PER_LONG < 64
+u32 int_sqrt64(u64 x);
+#else
+static inline u32 int_sqrt64(u64 x)
+{
+        return (u32)int_sqrt(x);
+}
+#endif
+
 extern void bust_spinlocks(int yes);
 extern int oops_in_progress;            /* If set, an oops, panic(), BUG() or die() is in progress */
 extern int panic_timeout;