Provide stub function for smt related parallel bring up functions
so that HOTPLUG_PARALLEL can work without HOTPLUG_PARALLEL.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
v2: Use stub function (tglx)
---
 kernel/cpu.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 1209ddaec026..c89e0e91379a 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1808,6 +1808,7 @@ static int __init parallel_bringup_parse_param(char *arg)
 }
 early_param("cpuhp.parallel", parallel_bringup_parse_param);
 
+#ifdef CONFIG_HOTPLUG_SMT
 static inline bool cpuhp_smt_aware(void)
 {
 	return cpu_smt_max_threads > 1;
@@ -1817,6 +1818,16 @@ static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
 {
 	return cpu_primary_thread_mask;
 }
+#else
+static inline bool cpuhp_smt_aware(void)
+{
+	return false;
+}
+static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
+{
+	return cpu_none_mask;
+}
+#endif
 
 /*
  * On architectures which have enabled parallel bringup this invokes all BP

-- 
2.45.2

On Mon, Jul 15 2024 at 21:35, Jiaxun Yang wrote:
> Provide stub function for smt related parallel bring up functions
> so that HOTPLUG_PARALLEL can work without HOTPLUG_PARALLEL.

That sentence does not make any sense. Also please use SMT instead of smt

Thanks,

        tglx