1 files changed, 2 insertions, 4 deletions

diff --git a/lib/int_sqrt.c b/lib/int_sqrt.c
index 036c96781ea8..67bb300b5b46 100644
--- a/lib/int_sqrt.c
+++ b/lib/int_sqrt.c
@@ -8,6 +8,7 @@
 
 #include <linux/kernel.h>
 #include <linux/export.h>
+#include <linux/bitops.h>
 
 /**
  * int_sqrt - rough approximation to sqrt
@@ -22,10 +23,7 @@ unsigned long int_sqrt(unsigned long x)
         if (x <= 1)
                 return x;
 
-        m = 1UL << (BITS_PER_LONG - 2);
-        while (m > x)
-                m >>= 2;
-
+        m = 1UL << (__fls(x) & ~1UL);
         while (m != 0) {
                 b = y + m;
                 y >>= 1;