linux-kernel - [PATCH 2/2] KVM: arm64: Use the bitmap API to allocate bitmaps

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Message-Id: <3c5043731db4d3635383e9326bc7e98e25de3288.1681854412.git.christophe.jaillet@wanadoo.fr>
Date:   Tue, 18 Apr 2023 23:47:38 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev
Subject: [PATCH 2/2] KVM: arm64: 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.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 arch/arm64/kvm/vmid.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kvm/vmid.c b/arch/arm64/kvm/vmid.c
index bbf0677cfefa..7fe8ba1a2851 100644
--- a/arch/arm64/kvm/vmid.c
+++ b/arch/arm64/kvm/vmid.c
@@ -182,8 +182,7 @@ int __init kvm_arm_vmid_alloc_init(void)
 	 */
 	WARN_ON(NUM_USER_VMIDS - 1 <= num_possible_cpus());
 	atomic64_set(&vmid_generation, VMID_FIRST_VERSION);
-	vmid_map = kcalloc(BITS_TO_LONGS(NUM_USER_VMIDS),
-			   sizeof(*vmid_map), GFP_KERNEL);
+	vmid_map = bitmap_zalloc(NUM_USER_VMIDS, GFP_KERNEL);
 	if (!vmid_map)
 		return -ENOMEM;
 
@@ -192,5 +191,5 @@ int __init kvm_arm_vmid_alloc_init(void)
 
 void __init kvm_arm_vmid_alloc_free(void)
 {
-	kfree(vmid_map);
+	bitmap_free(vmid_map);
 }
-- 
2.34.1