linux-kernel - [PATCH] x86/kvm: Make kvm_async_pf_task

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Message-ID: <20250729153901.564123-1-seanjc@google.com>
Date: Tue, 29 Jul 2025 08:39:01 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <seanjc@...gle.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] x86/kvm: Make kvm_async_pf_task_wake() a local static helper

Make kvm_async_pf_task_wake() static and drop its export, as the symbol is
only referenced from within kvm.c.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/include/asm/kvm_para.h | 2 --
 arch/x86/kernel/kvm.c           | 3 +--
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 57bc74e112f2..4a47c16e2df8 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -124,7 +124,6 @@ bool kvm_para_available(void);
 unsigned int kvm_arch_para_features(void);
 unsigned int kvm_arch_para_hints(void);
 void kvm_async_pf_task_wait_schedule(u32 token);
-void kvm_async_pf_task_wake(u32 token);
 u32 kvm_read_and_reset_apf_flags(void);
 bool __kvm_handle_async_pf(struct pt_regs *regs, u32 token);
 
@@ -148,7 +147,6 @@ static inline void kvm_spinlock_init(void)
 
 #else /* CONFIG_KVM_GUEST */
 #define kvm_async_pf_task_wait_schedule(T) do {} while(0)
-#define kvm_async_pf_task_wake(T) do {} while(0)
 
 static inline bool kvm_para_available(void)
 {
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 921c1c783bc1..180a8c146846 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -190,7 +190,7 @@ static void apf_task_wake_all(void)
 	}
 }
 
-void kvm_async_pf_task_wake(u32 token)
+static void kvm_async_pf_task_wake(u32 token)
 {
 	u32 key = hash_32(token, KVM_TASK_SLEEP_HASHBITS);
 	struct kvm_task_sleep_head *b = &async_pf_sleepers[key];
@@ -241,7 +241,6 @@ void kvm_async_pf_task_wake(u32 token)
 	/* A dummy token might be allocated and ultimately not used.  */
 	kfree(dummy);
 }
-EXPORT_SYMBOL_GPL(kvm_async_pf_task_wake);
 
 noinstr u32 kvm_read_and_reset_apf_flags(void)
 {

base-commit: 038d61fd642278bab63ee8ef722c50d10ab01e8f
-- 
2.50.1.487.gc89ff58d15-goog