diff options
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-03-13 21:44:51 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-03-13 21:44:51 +0000 |
| commit | 97fb44eb6bc01f4ffed4300e475aa15e44877375 (patch) | |
| tree | 481ed6efd0babe7185cae04f2fd295426b36411d /kernel/rcupdate.c | |
| parent | e4707dd3e9d0cb57597b6568a5e51fea5d6fca41 (diff) | |
| parent | 148854c65ea8046b045672fd49f4333aefaa3ab5 (diff) | |
Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel
Conflicts:
arch/arm/mach-at91/gpio.c
Diffstat (limited to 'kernel/rcupdate.c')
| -rw-r--r-- | kernel/rcupdate.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index d92a76a881a..cae8a059cf4 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c @@ -44,6 +44,7 @@ #include <linux/cpu.h> #include <linux/mutex.h> #include <linux/module.h> +#include <linux/kernel_stat.h> enum rcu_barrier { RCU_BARRIER_STD, @@ -55,6 +56,7 @@ static DEFINE_PER_CPU(struct rcu_head, rcu_barrier_head) = {NULL}; static atomic_t rcu_barrier_cpu_count; static DEFINE_MUTEX(rcu_barrier_mutex); static struct completion rcu_barrier_completion; +int rcu_scheduler_active __read_mostly; /* * Awaken the corresponding synchronize_rcu() instance now that a @@ -80,6 +82,10 @@ void wakeme_after_rcu(struct rcu_head *head) void synchronize_rcu(void) { struct rcu_synchronize rcu; + + if (rcu_blocking_is_gp()) + return; + init_completion(&rcu.completion); /* Will wake me after RCU finished. */ call_rcu(&rcu.head, wakeme_after_rcu); @@ -175,3 +181,9 @@ void __init rcu_init(void) __rcu_init(); } +void rcu_scheduler_starting(void) +{ + WARN_ON(num_online_cpus() != 1); + WARN_ON(nr_context_switches() > 0); + rcu_scheduler_active = 1; +} |