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-rw-r--r--arch/arm64/include/asm/paravirt.h14
-rw-r--r--arch/arm64/kernel/paravirt.c13
2 files changed, 14 insertions, 13 deletions
diff --git a/arch/arm64/include/asm/paravirt.h b/arch/arm64/include/asm/paravirt.h
index cf3a0fd7c1a7..9aa193e0e8f2 100644
--- a/arch/arm64/include/asm/paravirt.h
+++ b/arch/arm64/include/asm/paravirt.h
@@ -3,23 +3,19 @@
#define _ASM_ARM64_PARAVIRT_H
#ifdef CONFIG_PARAVIRT
+#include <linux/static_call_types.h>
+
struct static_key;
extern struct static_key paravirt_steal_enabled;
extern struct static_key paravirt_steal_rq_enabled;
-struct pv_time_ops {
- unsigned long long (*steal_clock)(int cpu);
-};
-
-struct paravirt_patch_template {
- struct pv_time_ops time;
-};
+u64 dummy_steal_clock(int cpu);
-extern struct paravirt_patch_template pv_ops;
+DECLARE_STATIC_CALL(pv_steal_clock, dummy_steal_clock);
static inline u64 paravirt_steal_clock(int cpu)
{
- return pv_ops.time.steal_clock(cpu);
+ return static_call(pv_steal_clock)(cpu);
}
int __init pv_time_init(void);
diff --git a/arch/arm64/kernel/paravirt.c b/arch/arm64/kernel/paravirt.c
index c07d7a034941..75fed4460407 100644
--- a/arch/arm64/kernel/paravirt.c
+++ b/arch/arm64/kernel/paravirt.c
@@ -18,6 +18,7 @@
#include <linux/reboot.h>
#include <linux/slab.h>
#include <linux/types.h>
+#include <linux/static_call.h>
#include <asm/paravirt.h>
#include <asm/pvclock-abi.h>
@@ -26,8 +27,12 @@
struct static_key paravirt_steal_enabled;
struct static_key paravirt_steal_rq_enabled;
-struct paravirt_patch_template pv_ops;
-EXPORT_SYMBOL_GPL(pv_ops);
+static u64 native_steal_clock(int cpu)
+{
+ return 0;
+}
+
+DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock);
struct pv_time_stolen_time_region {
struct pvclock_vcpu_stolen_time *kaddr;
@@ -45,7 +50,7 @@ static int __init parse_no_stealacc(char *arg)
early_param("no-steal-acc", parse_no_stealacc);
/* return stolen time in ns by asking the hypervisor */
-static u64 pv_steal_clock(int cpu)
+static u64 para_steal_clock(int cpu)
{
struct pv_time_stolen_time_region *reg;
@@ -150,7 +155,7 @@ int __init pv_time_init(void)
if (ret)
return ret;
- pv_ops.time.steal_clock = pv_steal_clock;
+ static_call_update(pv_steal_clock, para_steal_clock);
static_key_slow_inc(&paravirt_steal_enabled);
if (steal_acc)