From 4be8ddb48b1b6c6067fb59c846b9c6e19d6efe14 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Tue, 18 Apr 2023 23:47:37 +0200 Subject: KVM: arm64: Slightly optimize flush_context() bitmap_zero() is faster than bitmap_clear(), so use it to save a few cycles. Signed-off-by: Christophe JAILLET Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/97bf2743f3a302b3066aced02218b9da60690dd3.1681854412.git.christophe.jaillet@wanadoo.fr --- arch/arm64/kvm/vmid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm64/kvm/vmid.c') diff --git a/arch/arm64/kvm/vmid.c b/arch/arm64/kvm/vmid.c index 08978d0672e7..bbf0677cfefa 100644 --- a/arch/arm64/kvm/vmid.c +++ b/arch/arm64/kvm/vmid.c @@ -47,7 +47,7 @@ static void flush_context(void) int cpu; u64 vmid; - bitmap_clear(vmid_map, 0, NUM_USER_VMIDS); + bitmap_zero(vmid_map, NUM_USER_VMIDS); for_each_possible_cpu(cpu) { vmid = atomic64_xchg_relaxed(&per_cpu(active_vmids, cpu), 0); -- cgit From a00e9e4319c2a8a8b166da028292de83190e39a4 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Tue, 18 Apr 2023 23:47:38 +0200 Subject: 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 Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/3c5043731db4d3635383e9326bc7e98e25de3288.1681854412.git.christophe.jaillet@wanadoo.fr --- arch/arm64/kvm/vmid.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'arch/arm64/kvm/vmid.c') 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); } -- cgit