diff --git a/qemu/cpus.c b/qemu/cpus.c
index aeb543cd..e1c924bd 100644
--- a/qemu/cpus.c
+++ b/qemu/cpus.c
@@ -58,9 +58,9 @@ bool cpu_is_stopped(CPUState *cpu)
     return cpu->stopped;
 }
 
-void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data)
+void run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data)
 {
-    func(data);
+    func(cpu, data);
 }
 
 int resume_all_vcpus(struct uc_struct *uc)
diff --git a/qemu/include/qom/cpu.h b/qemu/include/qom/cpu.h
index a099b8fd..124409e0 100644
--- a/qemu/include/qom/cpu.h
+++ b/qemu/include/qom/cpu.h
@@ -189,6 +189,8 @@ struct kvm_run;
 #define TB_JMP_CACHE_BITS 12
 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
 
+typedef void (*run_on_cpu_func)(CPUState *cpu, void *data);
+
 // Unicorn: Moved CPUAddressSpace here from exec.c
 /**
  * CPUAddressSpace: all the information a CPU needs about an AddressSpace
@@ -545,7 +547,7 @@ bool cpu_is_stopped(CPUState *cpu);
  *
  * Schedules the function @func for execution on the vCPU @cpu.
  */
-void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
+void run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data);
 
 /**
  * async_run_on_cpu:
@@ -555,7 +557,7 @@ void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
  *
  * Schedules the function @func for execution on the vCPU @cpu asynchronously.
  */
-void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
+void async_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data);
 
 /**
  * qemu_get_cpu:
diff --git a/qemu/target-i386/helper.c b/qemu/target-i386/helper.c
index 36238d2a..6837c94f 100644
--- a/qemu/target-i386/helper.c
+++ b/qemu/target-i386/helper.c
@@ -932,7 +932,6 @@ out:
 }
 
 typedef struct MCEInjectionParams {
-    X86CPU *cpu;
     int bank;
     uint64_t status;
     uint64_t mcg_status;