linux-kernel - [PATCH net-next v2 2/4] net: macb: use hweight32() to count set bits in queue

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Message-ID: <1593680761-11427-3-git-send-email-claudiu.beznea@microchip.com>
Date:   Thu, 2 Jul 2020 12:05:59 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <nicolas.ferre@...rochip.com>, <davem@...emloft.net>,
        <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH net-next v2 2/4] net: macb: use hweight32() to count set bits in queue_mask

Use hweight32() to count set bits in queue_mask.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/net/ethernet/cadence/macb_main.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 1bc2810f3dc4..7668b6ae8822 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3482,8 +3482,6 @@ static void macb_probe_queues(void __iomem *mem,
 			      unsigned int *queue_mask,
 			      unsigned int *num_queues)
 {
-	unsigned int hw_q;
-
 	*queue_mask = 0x1;
 	*num_queues = 1;
 
@@ -3498,10 +3496,7 @@ static void macb_probe_queues(void __iomem *mem,
 
 	/* bit 0 is never set but queue 0 always exists */
 	*queue_mask |= readl_relaxed(mem + GEM_DCFG6) & 0xff;
-
-	for (hw_q = 1; hw_q < MACB_MAX_QUEUES; ++hw_q)
-		if (*queue_mask & (1 << hw_q))
-			(*num_queues)++;
+	*num_queues = hweight32(*queue_mask);
 }
 
 static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
-- 
2.7.4