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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-04-02 16:17:17 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-05-10 11:08:34 -0700 |
| commit | bbad937983147c017c25406860287cb94da9af7c (patch) | |
| tree | 57311598c360b92b189c7ec337146e4bc779c73d /include/linux | |
| parent | 25502a6c13745f4650cc59322bd198194f55e796 (diff) | |
| download | linux-stable-bbad937983147c017c25406860287cb94da9af7c.tar.gz linux-stable-bbad937983147c017c25406860287cb94da9af7c.tar.bz2 linux-stable-bbad937983147c017c25406860287cb94da9af7c.zip | |
rcu: slim down rcutiny by removing rcu_scheduler_active and friends
TINY_RCU does not need rcu_scheduler_active unless CONFIG_DEBUG_LOCK_ALLOC.
So conditionally compile rcu_scheduler_active in order to slim down
rcutiny a bit more. Also gets rid of an EXPORT_SYMBOL_GPL, which is
responsible for most of the slimming.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/rcupdate.h | 4 | ||||
| -rw-r--r-- | include/linux/rcutiny.h | 13 | ||||
| -rw-r--r-- | include/linux/rcutree.h | 3 |
3 files changed, 17 insertions, 3 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index d8fb2abcf303..23be3a702516 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -64,8 +64,6 @@ extern int sched_expedited_torture_stats(char *page); /* Internal to kernel */ extern void rcu_init(void); -extern int rcu_scheduler_active; -extern void rcu_scheduler_starting(void); #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) #include <linux/rcutree.h> @@ -178,7 +176,7 @@ static inline int rcu_read_lock_bh_held(void) #ifdef CONFIG_PREEMPT static inline int rcu_read_lock_sched_held(void) { - return !rcu_scheduler_active || preempt_count() != 0 || irqs_disabled(); + return preempt_count() != 0 || irqs_disabled(); } #else /* #ifdef CONFIG_PREEMPT */ static inline int rcu_read_lock_sched_held(void) diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h index ff22b97fb979..14e5a76b2c06 100644 --- a/include/linux/rcutiny.h +++ b/include/linux/rcutiny.h @@ -128,4 +128,17 @@ static inline int rcu_preempt_depth(void) return 0; } +#ifdef CONFIG_DEBUG_LOCK_ALLOC + +extern int rcu_scheduler_active __read_mostly; +extern void rcu_scheduler_starting(void); + +#else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */ + +static inline void rcu_scheduler_starting(void) +{ +} + +#endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */ + #endif /* __LINUX_RCUTINY_H */ diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index b9f74606f320..48282055e83d 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -123,4 +123,7 @@ static inline int rcu_blocking_is_gp(void) return num_online_cpus() == 1; } +extern void rcu_scheduler_starting(void); +extern int rcu_scheduler_active __read_mostly; + #endif /* __LINUX_RCUTREE_H */ |