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charset="utf-8" rcu_all_qs() is defined for !CONFIG_PREEMPT_RCU but the declaration is conditioned on CONFIG_PREEMPTION. With CONFIG_PREEMPT_LAZY, CONFIG_PREEMPTION=3Dy does not imply CONFIG_PREEMPT_RCU=3Dy. Decouple the two. Cc: Paul E. McKenney Signed-off-by: Ankur Arora --- include/linux/rcutree.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index 90a684f94776..ae8b5cb475a3 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -104,7 +104,7 @@ extern int rcu_scheduler_active; void rcu_end_inkernel_boot(void); bool rcu_inkernel_boot_has_ended(void); bool rcu_is_watching(void); -#ifndef CONFIG_PREEMPTION +#ifndef CONFIG_PREEMPT_RCU void rcu_all_qs(void); #endif =20 --=20 2.43.5