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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-03-27 18:11:15 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-06-10 22:45:51 +0200 |
| commit | 9dc5ad32488a75504349372330cc228d4dd678db (patch) | |
| tree | 794a5a4ac485fa4e6141dc6f14d23b0963c4bbab /kernel/rcutiny_plugin.h | |
| parent | rcu: Remove rcu_preempt_process_callbacks() (diff) | |
| download | linux-9dc5ad32488a75504349372330cc228d4dd678db.tar.xz linux-9dc5ad32488a75504349372330cc228d4dd678db.zip | |
rcu: Simplify RCU_TINY RCU callback invocation
TINY_PREEMPT_RCU could use a kthread to handle RCU callback invocation,
which required an API to abstract kthread vs. softirq invocation.
Now that TINY_PREEMPT_RCU is no longer with us, this commit retires
this API in favor of direct use of the relevant softirq primitives.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutiny_plugin.h')
| -rw-r--r-- | kernel/rcutiny_plugin.h | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h index bfe992407803..36fd83c544c8 100644 --- a/kernel/rcutiny_plugin.h +++ b/kernel/rcutiny_plugin.h @@ -102,39 +102,6 @@ static void check_cpu_stalls(void) RCU_TRACE(check_cpu_stall_preempt()); } -/* Hold off callback invocation until early_initcall() time. */ -static int rcu_scheduler_fully_active __read_mostly; - -/* - * Start up softirq processing of callbacks. - */ -void invoke_rcu_callbacks(void) -{ - if (rcu_scheduler_fully_active) - raise_softirq(RCU_SOFTIRQ); -} - -#ifdef CONFIG_RCU_TRACE - -/* - * There is no callback kthread, so this thread is never it. - */ -static bool rcu_is_callbacks_kthread(void) -{ - return false; -} - -#endif /* #ifdef CONFIG_RCU_TRACE */ - -static int __init rcu_scheduler_really_started(void) -{ - rcu_scheduler_fully_active = 1; - open_softirq(RCU_SOFTIRQ, rcu_process_callbacks); - raise_softirq(RCU_SOFTIRQ); /* Invoke any callbacks from early boot. */ - return 0; -} -early_initcall(rcu_scheduler_really_started); - #ifdef CONFIG_DEBUG_LOCK_ALLOC #include <linux/kernel_stat.h> |