We must use the BQL for do_run_on_cpu() without much choice, it means the
parameter is helpless.  Remove it.  Meanwhile use the newly introduced
qemu_cond_wait_iothread() in do_run_on_cpu().

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 cpus-common.c         | 5 ++---
 cpus.c                | 2 +-
 include/hw/core/cpu.h | 4 +---
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/cpus-common.c b/cpus-common.c
index eaf590cb38..4fc11b4e1c 100644
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -121,8 +121,7 @@ static void queue_work_on_cpu(CPUState *cpu, struct qemu_work_item *wi)
     qemu_cpu_kick(cpu);
 }
 
-void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data,
-                   QemuMutex *mutex)
+void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data)
 {
     struct qemu_work_item wi;
 
@@ -141,7 +140,7 @@ void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data,
     while (!atomic_mb_read(&wi.done)) {
         CPUState *self_cpu = current_cpu;
 
-        qemu_cond_wait(&qemu_work_cond, mutex);
+        qemu_cond_wait_iothread(&qemu_work_cond);
         current_cpu = self_cpu;
     }
 }
diff --git a/cpus.c b/cpus.c
index 263eddc8b0..5cbc3f30de 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1140,7 +1140,7 @@ void qemu_init_cpu_loop(void)
 
 void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data)
 {
-    do_run_on_cpu(cpu, func, data, &qemu_global_mutex);
+    do_run_on_cpu(cpu, func, data);
 }
 
 static void qemu_kvm_destroy_vcpu(CPUState *cpu)
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 5bf94d28cf..b26fdb5ab8 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -734,12 +734,10 @@ bool cpu_is_stopped(CPUState *cpu);
  * @cpu: The vCPU to run on.
  * @func: The function to be executed.
  * @data: Data to pass to the function.
- * @mutex: Mutex to release while waiting for @func to run.
  *
  * Used internally in the implementation of run_on_cpu.
  */
-void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data,
-                   QemuMutex *mutex);
+void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data);
 
 /**
  * run_on_cpu:
-- 
2.24.1