linux-kernel - [PATCH] staging: vt6656: Use BIT_ULL() macro instead of bit shift operation

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Date:   Sat,  7 Mar 2020 11:49:29 +0100
From:   Oscar Carter <oscar.carter@....com>
To:     Forest Bond <forest@...ttletooquiet.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Quentin Deslandes <quentin.deslandes@...ev.co.uk>,
        Malcolm Priestley <tvboxspy@...il.com>,
        Colin Ian King <colin.king@...onical.com>,
        Gabriela Bittencourt <gabrielabittencourt00@...il.com>,
        Oscar Carter <oscar.carter@....com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: vt6656: Use BIT_ULL() macro instead of bit shift operation

Replace the bit left shift operation with the BIT_ULL() macro and remove
the unnecessary "and" operation against the bit_nr variable.

Signed-off-by: Oscar Carter <oscar.carter@....com>
---
 drivers/staging/vt6656/main_usb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index 5e48b3ddb94c..f7ca9e97594d 100644
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -21,6 +21,7 @@
  */
 #undef __NO_VERSION__

+#include <linux/bits.h>
 #include <linux/etherdevice.h>
 #include <linux/file.h>
 #include "device.h"
@@ -802,8 +803,7 @@ static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,

 	netdev_hw_addr_list_for_each(ha, mc_list) {
 		bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
-
-		mc_filter |= 1ULL << (bit_nr & 0x3f);
+		mc_filter |= BIT_ULL(bit_nr);
 	}

 	priv->mc_list_count = mc_list->count;
--
2.20.1