b43: use standard fls for finding the most significant bit

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 15 deletions

diff --git a/drivers/net/wireless/b43/phy_lp.c b/drivers/net/wireless/b43/phy_lp.c
index eb4fb4581edb..b58d6cf26580 100644
--- a/drivers/net/wireless/b43/phy_lp.c
+++ b/drivers/net/wireless/b43/phy_lp.c
@@ -1710,19 +1710,6 @@ static const struct lpphy_rx_iq_comp lpphy_rev2plus_iq_comp = {
         .c0 = 0,
 };
 
-static u8 lpphy_nbits(s32 val)
-{
-        u32 tmp = abs(val);
-        u8 nbits = 0;
-
-        while (tmp != 0) {
-                nbits++;
-                tmp >>= 1;
-        }
-
-        return nbits;
-}
-
 static int lpphy_calc_rx_iq_comp(struct b43_wldev *dev, u16 samples)
 {
         struct lpphy_iq_est iq_est;
@@ -1749,8 +1736,8 @@ static int lpphy_calc_rx_iq_comp(struct b43_wldev *dev, u16 samples)
                 goto out;
         }
 
-        prod_msb = lpphy_nbits(prod);
-        q_msb = lpphy_nbits(qpwr);
+        prod_msb = fls(abs(prod));
+        q_msb = fls(abs(qpwr));
         tmp1 = prod_msb - 20;
 
         if (tmp1 >= 0) {