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Merge branches 'doc.2015.02.26a', 'earlycb.2015.03.03a', 'fixes.2015.03.03a', 'gpexp.2015.02.26a', 'hotplug.2015.03.20a', 'sysidle.2015.02.26b' and 'tiny.2015.02.26a' into HEAD

Browse source 
doc.2015.02.26a:  Documentation changes
earlycb.2015.03.03a:  Permit early-boot RCU callbacks
fixes.2015.03.03a:  Miscellaneous fixes
gpexp.2015.02.26a:  In-kernel expediting of normal grace periods
hotplug.2015.03.20a:  CPU hotplug fixes
sysidle.2015.02.26b:  NO_HZ_FULL_SYSIDLE fixes
tiny.2015.02.26a:  TINY_RCU fixes
This commit is contained in:
Paul E. McKenney 2015-03-20 08:31:01 -07:00
commit 42528795ac
26 changed files with 863 additions and 377 deletions
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40
include/linux/rcupdate.h
View file

@ -48,6 +48,26 @@
extern int rcu_expedited; /* for sysctl */
#ifdef CONFIG_TINY_RCU
/* Tiny RCU doesn't expedite, as its purpose in life is instead to be tiny. */
static inline bool rcu_gp_is_expedited(void) /* Internal RCU use. */
{
return false;
}
static inline void rcu_expedite_gp(void)
{
}
static inline void rcu_unexpedite_gp(void)
{
}
#else /* #ifdef CONFIG_TINY_RCU */
bool rcu_gp_is_expedited(void); /* Internal RCU use. */
void rcu_expedite_gp(void);
void rcu_unexpedite_gp(void);
#endif /* #else #ifdef CONFIG_TINY_RCU */
enum rcutorture_type {
RCU_FLAVOR,
RCU_BH_FLAVOR,
@ -195,6 +215,15 @@ void call_rcu_sched(struct rcu_head *head,
void synchronize_sched(void);
/*
* Structure allowing asynchronous waiting on RCU.
*/
struct rcu_synchronize {
struct rcu_head head;
struct completion completion;
};
void wakeme_after_rcu(struct rcu_head *head);
/**
* call_rcu_tasks() - Queue an RCU for invocation task-based grace period
* @head: structure to be used for queueing the RCU updates.
@ -258,6 +287,7 @@ static inline int rcu_preempt_depth(void)
/* Internal to kernel */
void rcu_init(void);
void rcu_end_inkernel_boot(void);
void rcu_sched_qs(void);
void rcu_bh_qs(void);
void rcu_check_callbacks(int user);
@ -266,6 +296,8 @@ void rcu_idle_enter(void);
void rcu_idle_exit(void);
void rcu_irq_enter(void);
void rcu_irq_exit(void);
int rcu_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu);
#ifdef CONFIG_RCU_STALL_COMMON
void rcu_sysrq_start(void);
@ -720,7 +752,7 @@ static inline void rcu_preempt_sleep_check(void)
* annotated as __rcu.
*/
#define rcu_dereference_check(p, c) \
__rcu_dereference_check((p), rcu_read_lock_held() || (c), __rcu)
__rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu)
/**
* rcu_dereference_bh_check() - rcu_dereference_bh with debug checking
@ -730,7 +762,7 @@ static inline void rcu_preempt_sleep_check(void)
* This is the RCU-bh counterpart to rcu_dereference_check().
*/
#define rcu_dereference_bh_check(p, c) \
__rcu_dereference_check((p), rcu_read_lock_bh_held() || (c), __rcu)
__rcu_dereference_check((p), (c) || rcu_read_lock_bh_held(), __rcu)
/**
* rcu_dereference_sched_check() - rcu_dereference_sched with debug checking
@ -740,7 +772,7 @@ static inline void rcu_preempt_sleep_check(void)
* This is the RCU-sched counterpart to rcu_dereference_check().
*/
#define rcu_dereference_sched_check(p, c) \
__rcu_dereference_check((p), rcu_read_lock_sched_held() || (c), \
__rcu_dereference_check((p), (c) || rcu_read_lock_sched_held(), \
__rcu)
#define rcu_dereference_raw(p) rcu_dereference_check(p, 1) /*@@@ needed? @@@*/
@ -933,9 +965,9 @@ static inline void rcu_read_unlock(void)
{
rcu_lockdep_assert(rcu_is_watching(),
"rcu_read_unlock() used illegally while idle");
rcu_lock_release(&rcu_lock_map);
__release(RCU);
__rcu_read_unlock();
rcu_lock_release(&rcu_lock_map); /* Keep acq info for rls diags. */
}
/**