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Merge branch 'x86/urgent' into x86/core

Browse source 
Conflicts:
	arch/x86/include/asm/fixmap_64.h
Semantic merge:
	arch/x86/include/asm/fixmap.h

Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Ingo Molnar 2009-03-05 21:48:31 +01:00
commit a1413c89ae
43 changed files with 356 additions and 162 deletions
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6
include/linux/rcuclassic.h
View file

@ -181,4 +181,10 @@ extern long rcu_batches_completed_bh(void);
#define rcu_enter_nohz() do { } while (0)
#define rcu_exit_nohz() do { } while (0)
/* A context switch is a grace period for rcuclassic. */
static inline int rcu_blocking_is_gp(void)
{
return num_online_cpus() == 1;
}
#endif /* __LINUX_RCUCLASSIC_H */

4
include/linux/rcupdate.h
View file

@ -52,6 +52,9 @@ struct rcu_head {
void (*func)(struct rcu_head *head);
};
/* Internal to kernel, but needed by rcupreempt.h. */
extern int rcu_scheduler_active;
#if defined(CONFIG_CLASSIC_RCU)
#include <linux/rcuclassic.h>
#elif defined(CONFIG_TREE_RCU)
@ -265,6 +268,7 @@ extern void rcu_barrier_sched(void);
/* Internal to kernel */
extern void rcu_init(void);
extern void rcu_scheduler_starting(void);
extern int rcu_needs_cpu(int cpu);
#endif /* __LINUX_RCUPDATE_H */

15
include/linux/rcupreempt.h
View file

@ -142,4 +142,19 @@ static inline void rcu_exit_nohz(void)
#define rcu_exit_nohz() do { } while (0)
#endif /* CONFIG_NO_HZ */
/*
* A context switch is a grace period for rcupreempt synchronize_rcu()
* only during early boot, before the scheduler has been initialized.
* So, how the heck do we get a context switch? Well, if the caller
* invokes synchronize_rcu(), they are willing to accept a context
* switch, so we simply pretend that one happened.
*
* After boot, there might be a blocked or preempted task in an RCU
* read-side critical section, so we cannot then take the fastpath.
*/
static inline int rcu_blocking_is_gp(void)
{
return num_online_cpus() == 1 && !rcu_scheduler_active;
}
#endif /* __LINUX_RCUPREEMPT_H */

6
include/linux/rcutree.h
View file

@ -326,4 +326,10 @@ static inline void rcu_exit_nohz(void)
}
#endif /* CONFIG_NO_HZ */
/* A context switch is a grace period for rcutree. */
static inline int rcu_blocking_is_gp(void)
{
return num_online_cpus() == 1;
}
#endif /* __LINUX_RCUTREE_H */

4
include/linux/sched.h
View file

@ -2303,9 +2303,13 @@ extern long sched_group_rt_runtime(struct task_group *tg);
extern int sched_group_set_rt_period(struct task_group *tg,
long rt_period_us);
extern long sched_group_rt_period(struct task_group *tg);
extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk);
#endif
#endif
extern int task_can_switch_user(struct user_struct *up,
struct task_struct *tsk);
#ifdef CONFIG_TASK_XACCT
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
{