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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2018-07-01 17:40:52 +0300
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2018-08-31 02:02:40 +0300
commit65cfe3583b612a22e12fba9a7bbd2d37ca5ad941 (patch)
tree66dcbed4b0f96f008ffdacd63f717ca4653f6b02 /include/linux/rcutree.h
parentba1c64c27239373be1b3d88cf0a9ac1b10fa871f (diff)
downloadlinux-65cfe3583b612a22e12fba9a7bbd2d37ca5ad941.tar.xz
rcu: Define RCU-bh update API in terms of RCU
Now that the main RCU API knows about softirq disabling and softirq's quiescent states, the RCU-bh update code can be dispensed with. This commit therefore removes the RCU-bh update-side implementation and defines RCU-bh's update-side API in terms of that of either RCU-preempt or RCU-sched, depending on the setting of the CONFIG_PREEMPT Kconfig option. In kernels built with CONFIG_RCU_NOCB_CPU=y this has the knock-on effect of reducing by one the number of rcuo kthreads per CPU. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/rcutree.h')
-rw-r--r--include/linux/rcutree.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 664b580695d6..c789c302a2c9 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -45,7 +45,11 @@ static inline void rcu_virt_note_context_switch(int cpu)
rcu_note_context_switch(false);
}
-void synchronize_rcu_bh(void);
+static inline void synchronize_rcu_bh(void)
+{
+ synchronize_rcu();
+}
+
void synchronize_sched_expedited(void);
void synchronize_rcu_expedited(void);
@@ -69,7 +73,7 @@ void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
*/
static inline void synchronize_rcu_bh_expedited(void)
{
- synchronize_sched_expedited();
+ synchronize_rcu_expedited();
}
void rcu_barrier(void);