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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2018-07-03 00:30:37 +0300
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2018-08-31 02:02:45 +0300
commit45975c7d21a1c0aba97e3d8007e2a7c123145748 (patch)
tree2fb06e198ccf2f551f0dc5f25b5c683076baaf1f /include/linux/rcutree.h
parent4cf439a200fd621f838270c36c853407a934bcb5 (diff)
downloadlinux-45975c7d21a1c0aba97e3d8007e2a7c123145748.tar.xz
rcu: Define RCU-sched API in terms of RCU for Tree RCU PREEMPT builds
Now that RCU-preempt knows about preemption disabling, its implementation of synchronize_rcu() works for synchronize_sched(), and likewise for the other RCU-sched update-side API members. This commit therefore confines the RCU-sched update-side code to CONFIG_PREEMPT=n builds, and defines RCU-sched's update-side API members in terms of those of RCU-preempt. This means that any given build of the Linux kernel has only one update-side flavor of RCU, namely RCU-preempt for CONFIG_PREEMPT=y builds and RCU-sched for CONFIG_PREEMPT=n builds. This in turn means that kernels built with CONFIG_RCU_NOCB_CPU=y have only one rcuo kthread per CPU. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'include/linux/rcutree.h')
-rw-r--r--include/linux/rcutree.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index f7a41323aa54..0c44720f0e84 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -45,14 +45,19 @@ static inline void rcu_virt_note_context_switch(int cpu)
rcu_note_context_switch(false);
}
+void synchronize_rcu(void);
static inline void synchronize_rcu_bh(void)
{
synchronize_rcu();
}
-void synchronize_sched_expedited(void);
void synchronize_rcu_expedited(void);
+static inline void synchronize_sched_expedited(void)
+{
+ synchronize_rcu_expedited();
+}
+
void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
/**