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[/] [test_project/] [trunk/] [linux_sd_driver/] [include/] [linux/] [preempt.h] - Blame information for rev 62

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#ifndef __LINUX_PREEMPT_H
#define __LINUX_PREEMPT_H
 
/*
 * include/linux/preempt.h - macros for accessing and manipulating
 * preempt_count (used for kernel preemption, interrupt count, etc.)
 */
 
#include <linux/thread_info.h>
#include <linux/linkage.h>
#include <linux/list.h>
 
#ifdef CONFIG_DEBUG_PREEMPT
  extern void fastcall add_preempt_count(int val);
  extern void fastcall sub_preempt_count(int val);
#else
# define add_preempt_count(val) do { preempt_count() += (val); } while (0)
# define sub_preempt_count(val) do { preempt_count() -= (val); } while (0)
#endif
 
#define inc_preempt_count() add_preempt_count(1)
#define dec_preempt_count() sub_preempt_count(1)
 
#define preempt_count() (current_thread_info()->preempt_count)
 
#ifdef CONFIG_PREEMPT
 
asmlinkage void preempt_schedule(void);
 
#define preempt_disable() \
do { \
        inc_preempt_count(); \
        barrier(); \
} while (0)
 
#define preempt_enable_no_resched() \
do { \
        barrier(); \
        dec_preempt_count(); \
} while (0)
 
#define preempt_check_resched() \
do { \
        if (unlikely(test_thread_flag(TIF_NEED_RESCHED))) \
                preempt_schedule(); \
} while (0)
 
#define preempt_enable() \
do { \
        preempt_enable_no_resched(); \
        barrier(); \
        preempt_check_resched(); \
} while (0)
 
#else
 
#define preempt_disable()               do { } while (0)
#define preempt_enable_no_resched()     do { } while (0)
#define preempt_enable()                do { } while (0)
#define preempt_check_resched()         do { } while (0)
 
#endif
 
#ifdef CONFIG_PREEMPT_NOTIFIERS
 
struct preempt_notifier;
 
/**
 * preempt_ops - notifiers called when a task is preempted and rescheduled
 * @sched_in: we're about to be rescheduled:
 *    notifier: struct preempt_notifier for the task being scheduled
 *    cpu:  cpu we're scheduled on
 * @sched_out: we've just been preempted
 *    notifier: struct preempt_notifier for the task being preempted
 *    next: the task that's kicking us out
 */
struct preempt_ops {
        void (*sched_in)(struct preempt_notifier *notifier, int cpu);
        void (*sched_out)(struct preempt_notifier *notifier,
                          struct task_struct *next);
};
 
/**
 * preempt_notifier - key for installing preemption notifiers
 * @link: internal use
 * @ops: defines the notifier functions to be called
 *
 * Usually used in conjunction with container_of().
 */
struct preempt_notifier {
        struct hlist_node link;
        struct preempt_ops *ops;
};
 
void preempt_notifier_register(struct preempt_notifier *notifier);
void preempt_notifier_unregister(struct preempt_notifier *notifier);
 
static inline void preempt_notifier_init(struct preempt_notifier *notifier,
                                     struct preempt_ops *ops)
{
        INIT_HLIST_NODE(&notifier->link);
        notifier->ops = ops;
}
 
#endif
 
#endif /* __LINUX_PREEMPT_H */

Line No.	Rev	Author	Line
1	62	marcus.erl	`#ifndef __LINUX_PREEMPT_H`
2			`#define __LINUX_PREEMPT_H`
3
4			`/*`
5			`* include/linux/preempt.h - macros for accessing and manipulating`
6			`* preempt_count (used for kernel preemption, interrupt count, etc.)`
7			`*/`
8
9			`#include <linux/thread_info.h>`
10			`#include <linux/linkage.h>`
11			`#include <linux/list.h>`
12
13			`#ifdef CONFIG_DEBUG_PREEMPT`
14			`extern void fastcall add_preempt_count(int val);`
15			`extern void fastcall sub_preempt_count(int val);`
16			`#else`
17			`# define add_preempt_count(val) do { preempt_count() += (val); } while (0)`
18			`# define sub_preempt_count(val) do { preempt_count() -= (val); } while (0)`
19			`#endif`
20
21			`#define inc_preempt_count() add_preempt_count(1)`
22			`#define dec_preempt_count() sub_preempt_count(1)`
23
24			`#define preempt_count() (current_thread_info()->preempt_count)`
25
26			`#ifdef CONFIG_PREEMPT`
27
28			`asmlinkage void preempt_schedule(void);`
29
30			`#define preempt_disable() \`
31			`do { \`
32			`inc_preempt_count(); \`
33			`barrier(); \`
34			`} while (0)`
35
36			`#define preempt_enable_no_resched() \`
37			`do { \`
38			`barrier(); \`
39			`dec_preempt_count(); \`
40			`} while (0)`
41
42			`#define preempt_check_resched() \`
43			`do { \`
44			`if (unlikely(test_thread_flag(TIF_NEED_RESCHED))) \`
45			`preempt_schedule(); \`
46			`} while (0)`
47
48			`#define preempt_enable() \`
49			`do { \`
50			`preempt_enable_no_resched(); \`
51			`barrier(); \`
52			`preempt_check_resched(); \`
53			`} while (0)`
54
55			`#else`
56
57			`#define preempt_disable() do { } while (0)`
58			`#define preempt_enable_no_resched() do { } while (0)`
59			`#define preempt_enable() do { } while (0)`
60			`#define preempt_check_resched() do { } while (0)`
61
62			`#endif`
63
64			`#ifdef CONFIG_PREEMPT_NOTIFIERS`
65
66			`struct preempt_notifier;`
67
68			`/**`
69			`* preempt_ops - notifiers called when a task is preempted and rescheduled`
70			`* @sched_in: we're about to be rescheduled:`
71			`* notifier: struct preempt_notifier for the task being scheduled`
72			`* cpu: cpu we're scheduled on`
73			`* @sched_out: we've just been preempted`
74			`* notifier: struct preempt_notifier for the task being preempted`
75			`* next: the task that's kicking us out`
76			`*/`
77			`struct preempt_ops {`
78			`void (sched_in)(struct preempt_notifier notifier, int cpu);`
79			`void (sched_out)(struct preempt_notifier notifier,`
80			`struct task_struct *next);`
81			`};`
82
83			`/**`
84			`* preempt_notifier - key for installing preemption notifiers`
85			`* @link: internal use`
86			`* @ops: defines the notifier functions to be called`
87			`*`
88			`* Usually used in conjunction with container_of().`
89			`*/`
90			`struct preempt_notifier {`
91			`struct hlist_node link;`
92			`struct preempt_ops *ops;`
93			`};`
94
95			`void preempt_notifier_register(struct preempt_notifier *notifier);`
96			`void preempt_notifier_unregister(struct preempt_notifier *notifier);`
97
98			`static inline void preempt_notifier_init(struct preempt_notifier *notifier,`
99			`struct preempt_ops *ops)`
100			`{`
101			`INIT_HLIST_NODE(&notifier->link);`
102			`notifier->ops = ops;`
103			`}`
104
105			`#endif`
106
107			`#endif /* __LINUX_PREEMPT_H */`

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[/] [test_project/] [trunk/] [linux_sd_driver/] [include/] [linux/] [preempt.h] - Blame information for rev 62