[PATCH 5.18 0039/1095] KVM: x86: Tag kvm_mmu_x86_module_init() with __init

From: Greg Kroah-Hartman
Date: Mon Aug 15 2022 - 16:18:14 EST


From: Sean Christopherson <seanjc@xxxxxxxxxx>

commit 982bae43f11c37b51d2f1961bb25ef7cac3746fa upstream.

Mark kvm_mmu_x86_module_init() with __init, the entire reason it exists
is to initialize variables when kvm.ko is loaded, i.e. it must never be
called after module initialization.

Fixes: 1d0e84806047 ("KVM: x86/mmu: Resolve nx_huge_pages when kvm.ko is loaded")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Kai Huang <kai.huang@xxxxxxxxx>
Tested-by: Michael Roth <michael.roth@xxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Message-Id: <20220803224957.1285926-2-seanjc@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/mmu/mmu.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1588,7 +1588,7 @@ static inline int kvm_arch_flush_remote_
#define kvm_arch_pmi_in_guest(vcpu) \
((vcpu) && (vcpu)->arch.handling_intr_from_guest)

-void kvm_mmu_x86_module_init(void);
+void __init kvm_mmu_x86_module_init(void);
int kvm_mmu_vendor_module_init(void);
void kvm_mmu_vendor_module_exit(void);

--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -6264,7 +6264,7 @@ static int set_nx_huge_pages(const char
* nx_huge_pages needs to be resolved to true/false when kvm.ko is loaded, as
* its default value of -1 is technically undefined behavior for a boolean.
*/
-void kvm_mmu_x86_module_init(void)
+void __init kvm_mmu_x86_module_init(void)
{
if (nx_huge_pages == -1)
__set_nx_huge_pages(get_nx_auto_mode());