linux-kernel - [PATCH] gpu: host1x: Use the bitmap API to allocate bitmaps

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Date:   Mon,  4 Jul 2022 22:31:51 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org
Subject: [PATCH] gpu: host1x: 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 bitmap_zero() call. The bitmap is already
zero'ed when allocated.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/gpu/host1x/channel.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/host1x/channel.c b/drivers/gpu/host1x/channel.c
index 2a9a3a8d5931..2d0051d6314c 100644
--- a/drivers/gpu/host1x/channel.c
+++ b/drivers/gpu/host1x/channel.c
@@ -21,22 +21,18 @@ int host1x_channel_list_init(struct host1x_channel_list *chlist,
 	if (!chlist->channels)
 		return -ENOMEM;
 
-	chlist->allocated_channels =
-		kcalloc(BITS_TO_LONGS(num_channels), sizeof(unsigned long),
-			GFP_KERNEL);
+	chlist->allocated_channels = bitmap_zalloc(num_channels, GFP_KERNEL);
 	if (!chlist->allocated_channels) {
 		kfree(chlist->channels);
 		return -ENOMEM;
 	}
 
-	bitmap_zero(chlist->allocated_channels, num_channels);
-
 	return 0;
 }
 
 void host1x_channel_list_free(struct host1x_channel_list *chlist)
 {
-	kfree(chlist->allocated_channels);
+	bitmap_free(chlist->allocated_channels);
 	kfree(chlist->channels);
 }
 
-- 
2.34.1