[PATCH] cpu/hotplug: fix unused function warning

From: Arnd Bergmann
Date: Thu Mar 15 2018 - 11:39:05 EST


The cpuhp_is_ap_state() function is no longer called outside of the
CONFIG_SMP #ifdef section, causing a harmless warning:

kernel/cpu.c:129:13: error: 'cpuhp_is_ap_state' defined but not used [-Werror=unused-function]

This moves the function into the #ifdef to get a clean build again.

Fixes: 17a2f1ced028 ("cpu/hotplug: Merge cpuhp_bp_states and cpuhp_ap_states")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
kernel/cpu.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index a1860d42aacf..0db8938fbb23 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -126,15 +126,6 @@ struct cpuhp_step {
static DEFINE_MUTEX(cpuhp_state_mutex);
static struct cpuhp_step cpuhp_hp_states[];

-static bool cpuhp_is_ap_state(enum cpuhp_state state)
-{
- /*
- * The extra check for CPUHP_TEARDOWN_CPU is only for documentation
- * purposes as that state is handled explicitly in cpu_down.
- */
- return state > CPUHP_BRINGUP_CPU && state != CPUHP_TEARDOWN_CPU;
-}
-
static struct cpuhp_step *cpuhp_get_step(enum cpuhp_state state)
{
return cpuhp_hp_states + state;
@@ -235,6 +226,15 @@ static int cpuhp_invoke_callback(unsigned int cpu, enum cpuhp_state state,
}

#ifdef CONFIG_SMP
+static bool cpuhp_is_ap_state(enum cpuhp_state state)
+{
+ /*
+ * The extra check for CPUHP_TEARDOWN_CPU is only for documentation
+ * purposes as that state is handled explicitly in cpu_down.
+ */
+ return state > CPUHP_BRINGUP_CPU && state != CPUHP_TEARDOWN_CPU;
+}
+
static inline void wait_for_ap_thread(struct cpuhp_cpu_state *st, bool bringup)
{
struct completion *done = bringup ? &st->done_up : &st->done_down;
--
2.9.0