The following commit has been merged into the smp/core branch of tip:
Commit-ID: 2dce993165088dbe728faa21547e3b74213b6732
Gitweb: https://git.kernel.org/tip/2dce993165088dbe728faa21547e3b74213b6732
Author: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
AuthorDate: Tue, 16 Jul 2024 22:14:59 +08:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Fri, 02 Aug 2024 16:13:46 +02:00
cpu/hotplug: Provide weak fallback for arch_cpuhp_init_parallel_bringup()
CONFIG_HOTPLUG_PARALLEL expects the architecture to implement
arch_cpuhp_init_parallel_bringup() to decide whether paralllel hotplug is
possible and to do the necessary architecture specific initialization.
There are architectures which can enable it unconditionally and do not
require architecture specific initialization.
Provide a weak fallback for arch_cpuhp_init_parallel_bringup() so that
such architectures are not forced to implement empty stub functions.
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20240716-loongarch-hotplug-v3-2-af59b3bb35c8@xxxxxxxxxxx
---
kernel/cpu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index c89e0e9..1632361 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1829,6 +1829,11 @@ static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
}
#endif
+bool __weak arch_cpuhp_init_parallel_bringup(void)
+{
+ return true;
+}
+
/*
* On architectures which have enabled parallel bringup this invokes all BP
* prepare states for each of the to be onlined APs first. The last state
|