linux-kernel - [PATCH] sgi-xp: Use the bitmap API to allocate bitmaps

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Date:   Mon,  4 Jul 2022 22:23:17 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Robin Holt <robinmholt@...il.com>, Steve Wahl <steve.wahl@....com>,
        Mike Travis <mike.travis@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] sgi-xp: Use the bitmap API to allocate bitmaps

Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.

It is less verbose and it improves the semantic.

While at it, remove a useless cast in a bitmap_empty() call.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/misc/sgi-xp/xpnet.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
index 50644f83e78c..2396ba3b03bd 100644
--- a/drivers/misc/sgi-xp/xpnet.c
+++ b/drivers/misc/sgi-xp/xpnet.c
@@ -285,7 +285,7 @@ xpnet_connection_activity(enum xp_retval reason, short partid, int channel,
 		__clear_bit(partid, xpnet_broadcast_partitions);
 		spin_unlock_bh(&xpnet_broadcast_lock);
 
-		if (bitmap_empty((unsigned long *)xpnet_broadcast_partitions,
+		if (bitmap_empty(xpnet_broadcast_partitions,
 				 xp_max_npartitions)) {
 			netif_carrier_off(xpnet_device);
 		}
@@ -522,9 +522,8 @@ xpnet_init(void)
 
 	dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME);
 
-	xpnet_broadcast_partitions = kcalloc(BITS_TO_LONGS(xp_max_npartitions),
-					     sizeof(long),
-					     GFP_KERNEL);
+	xpnet_broadcast_partitions = bitmap_zalloc(xp_max_npartitions,
+						   GFP_KERNEL);
 	if (xpnet_broadcast_partitions == NULL)
 		return -ENOMEM;
 
@@ -535,7 +534,7 @@ xpnet_init(void)
 	xpnet_device = alloc_netdev(0, XPNET_DEVICE_NAME, NET_NAME_UNKNOWN,
 				    ether_setup);
 	if (xpnet_device == NULL) {
-		kfree(xpnet_broadcast_partitions);
+		bitmap_free(xpnet_broadcast_partitions);
 		return -ENOMEM;
 	}
 
@@ -574,7 +573,7 @@ xpnet_init(void)
 	result = register_netdev(xpnet_device);
 	if (result != 0) {
 		free_netdev(xpnet_device);
-		kfree(xpnet_broadcast_partitions);
+		bitmap_free(xpnet_broadcast_partitions);
 	}
 
 	return result;
@@ -590,7 +589,7 @@ xpnet_exit(void)
 
 	unregister_netdev(xpnet_device);
 	free_netdev(xpnet_device);
-	kfree(xpnet_broadcast_partitions);
+	bitmap_free(xpnet_broadcast_partitions);
 }
 
 module_exit(xpnet_exit);
-- 
2.34.1