fix int_sqrt64() for very large numbers

[sfrench/cifs-2.6.git] / lib / int_sqrt.c

diff --git a/lib/int_sqrt.c b/lib/int_sqrt.c
index 14436f4ca6bd7f340971a4f85ded981a9c0b25dc..30e0f9770f88cef66f8655c0b377366b7d986db8 100644 (file)
--- a/lib/int_sqrt.c
+++ b/lib/int_sqrt.c
@@ -52,7 +52,7 @@ u32 int_sqrt64(u64 x)
        if (x <= ULONG_MAX)
                return int_sqrt((unsigned long) x);
 
-       m = 1ULL << (fls64(x) & ~1ULL);
+       m = 1ULL << ((fls64(x) - 1) & ~1ULL);
        while (m != 0) {
                b = y + m;
                y >>= 1;