Commit 2dce9931 authored by Jiaxun Yang's avatar Jiaxun Yang Committed by Thomas Gleixner
Browse files

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: default avatarJiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240716-loongarch-hotplug-v3-2-af59b3bb35c8@flygoat.com
parent c0e81a45

kernel/cpu.c

+5 −0
Original line number Diff line number Diff line
@@ -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