diff options
| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-30 16:43:05 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-01-25 15:29:54 -0800 |
| commit | 6ffdde28b7558ec48f4e0eee01821a66a67a8e25 (patch) | |
| tree | 21247efa6468a1fc047e4efdcc531e8fc1a1a273 /kernel/rcu/tree_plugin.h | |
| parent | 37f62d7cf00c085e1d7a91a6af286c4e8d32e1e1 (diff) | |
| download | linux-6ffdde28b7558ec48f4e0eee01821a66a67a8e25.tar.gz linux-6ffdde28b7558ec48f4e0eee01821a66a67a8e25.tar.bz2 linux-6ffdde28b7558ec48f4e0eee01821a66a67a8e25.zip | |
rcu: Move rcu_cpu_kthread_status to rcu_data structure
Given that RCU has a perfectly good per-CPU rcu_data structure, most
per-CPU quantities should be stored there.
This commit therefore moves the rcu_cpu_kthread_status per-CPU variable
to the rcu_data structure. This also makes this variable unconditionally
present, which should be acceptable given the memory reduction due to the
RCU flavor consolidation and also due to simplifications this will enable.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 359bf1f6f8e0..935dc594cf30 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -40,7 +40,6 @@ /* * Control variables for per-CPU and per-rcu_node kthreads. */ -DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_status); DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_loops); DEFINE_PER_CPU(char, rcu_cpu_has_work); @@ -1310,7 +1309,7 @@ static void invoke_rcu_callbacks_kthread(void) if (__this_cpu_read(rcu_data.rcu_cpu_kthread_task) != NULL && current != __this_cpu_read(rcu_data.rcu_cpu_kthread_task)) { rcu_wake_cond(__this_cpu_read(rcu_data.rcu_cpu_kthread_task), - __this_cpu_read(rcu_cpu_kthread_status)); + __this_cpu_read(rcu_data.rcu_cpu_kthread_status)); } local_irq_restore(flags); } @@ -1383,7 +1382,7 @@ static void rcu_cpu_kthread_setup(unsigned int cpu) static void rcu_cpu_kthread_park(unsigned int cpu) { - per_cpu(rcu_cpu_kthread_status, cpu) = RCU_KTHREAD_OFFCPU; + per_cpu(rcu_data.rcu_cpu_kthread_status, cpu) = RCU_KTHREAD_OFFCPU; } static int rcu_cpu_kthread_should_run(unsigned int cpu) @@ -1398,7 +1397,7 @@ static int rcu_cpu_kthread_should_run(unsigned int cpu) */ static void rcu_cpu_kthread(unsigned int cpu) { - unsigned int *statusp = this_cpu_ptr(&rcu_cpu_kthread_status); + unsigned int *statusp = this_cpu_ptr(&rcu_data.rcu_cpu_kthread_status); char work, *workp = this_cpu_ptr(&rcu_cpu_has_work); int spincnt; |