KVM: x86: use kvfree_rcu to simplify the code

Commit Message

lirongqing Jan. 22, 2025, 7:34 a.m. UTC

From: Li RongQing <[e-mail]>

The callback function of call_rcu() just calls kvfree(), so we can
use kvfree_rcu() instead of call_rcu() + callback function.

Signed-off-by: Li RongQing <[e-mail]>
---
 arch/x86/kvm/lapic.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

Patch

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 3c83951..d6e62a2 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -221,13 +221,6 @@  static inline bool kvm_apic_map_get_logical_dest(struct kvm_apic_map *map,
 	}
 }
 
-static void kvm_apic_map_free(struct rcu_head *rcu)
-{
-	struct kvm_apic_map *map = container_of(rcu, struct kvm_apic_map, rcu);
-
-	kvfree(map);
-}
-
 static int kvm_recalculate_phys_map(struct kvm_apic_map *new,
 				    struct kvm_vcpu *vcpu,
 				    bool *xapic_id_mismatch)
@@ -489,7 +482,7 @@  static void kvm_recalculate_apic_map(struct kvm *kvm)
 	mutex_unlock(&kvm->arch.apic_map_lock);
 
 	if (old)
-		call_rcu(&old->rcu, kvm_apic_map_free);
+		kvfree_rcu(old, rcu);
 
 	kvm_make_scan_ioapic_request(kvm);
 }