net/xdp: use shift instead of 64 bit division

64bit division is kind of expensive, and shift should do the job here.

Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 1bbaf17..a0d2b75 100644 (file)
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -336,7 +336,7 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
        if ((addr + size) < addr)
                return -EINVAL;
 
-       npgs = div_u64(size, PAGE_SIZE);
+       npgs = size >> PAGE_SHIFT;
        if (npgs > U32_MAX)
                return -EINVAL;