1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_SCHED_STAT_H 2 #ifndef _LINUX_SCHED_STAT_H
3 #define _LINUX_SCHED_STAT_H 3 #define _LINUX_SCHED_STAT_H
4 4
5 #include <linux/percpu.h> 5 #include <linux/percpu.h>
6 #include <linux/kconfig.h> <<
7 6
8 /* 7 /*
9 * Various counters maintained by the schedule 8 * Various counters maintained by the scheduler and fork(),
10 * exposed via /proc, sys.c or used by drivers 9 * exposed via /proc, sys.c or used by drivers via these APIs.
11 * 10 *
12 * ( Note that all these values are acquired w 11 * ( Note that all these values are acquired without locking,
13 * so they can only be relied on in narrow c 12 * so they can only be relied on in narrow circumstances. )
14 */ 13 */
15 14
16 extern unsigned long total_forks; 15 extern unsigned long total_forks;
17 extern int nr_threads; 16 extern int nr_threads;
18 DECLARE_PER_CPU(unsigned long, process_counts) 17 DECLARE_PER_CPU(unsigned long, process_counts);
19 extern int nr_processes(void); 18 extern int nr_processes(void);
20 extern unsigned int nr_running(void); !! 19 extern unsigned long nr_running(void);
21 extern bool single_task_running(void); 20 extern bool single_task_running(void);
22 extern unsigned int nr_iowait(void); !! 21 extern unsigned long nr_iowait(void);
23 extern unsigned int nr_iowait_cpu(int cpu); !! 22 extern unsigned long nr_iowait_cpu(int cpu);
24 23
25 static inline int sched_info_on(void) 24 static inline int sched_info_on(void)
26 { 25 {
27 return IS_ENABLED(CONFIG_SCHED_INFO); !! 26 #ifdef CONFIG_SCHEDSTATS
>> 27 return 1;
>> 28 #elif defined(CONFIG_TASK_DELAY_ACCT)
>> 29 extern int delayacct_on;
>> 30 return delayacct_on;
>> 31 #else
>> 32 return 0;
>> 33 #endif
28 } 34 }
29 35
30 #ifdef CONFIG_SCHEDSTATS 36 #ifdef CONFIG_SCHEDSTATS
31 void force_schedstat_enabled(void); 37 void force_schedstat_enabled(void);
32 #endif 38 #endif
33 39
34 #endif /* _LINUX_SCHED_STAT_H */ 40 #endif /* _LINUX_SCHED_STAT_H */
35 41
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