tcp: free batches of packets in tcp_prune_ofo_queue()

[linux-2.6-microblaze.git] / lib / int_sqrt.c

diff --git a/lib/int_sqrt.c b/lib/int_sqrt.c
index e2d3290..14436f4 100644 (file)
--- a/lib/int_sqrt.c
+++ b/lib/int_sqrt.c
@@ -38,3 +38,33 @@ unsigned long int_sqrt(unsigned long x)
        return y;
 }
 EXPORT_SYMBOL(int_sqrt);
+
+#if BITS_PER_LONG < 64
+/**
+ * int_sqrt64 - strongly typed int_sqrt function when minimum 64 bit input
+ * is expected.
+ * @x: 64bit integer of which to calculate the sqrt
+ */
+u32 int_sqrt64(u64 x)
+{
+       u64 b, m, y = 0;
+
+       if (x <= ULONG_MAX)
+               return int_sqrt((unsigned long) x);
+
+       m = 1ULL << (fls64(x) & ~1ULL);
+       while (m != 0) {
+               b = y + m;
+               y >>= 1;
+
+               if (x >= b) {
+                       x -= b;
+                       y += m;
+               }
+               m >>= 2;
+       }
+
+       return y;
+}
+EXPORT_SYMBOL(int_sqrt64);
+#endif