include/linux/profile.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_PROFILE_H
   3 #define _LINUX_PROFILE_H
   4
   5 #include <linux/kernel.h>
   6 #include <linux/init.h>
   7 #include <linux/cache.h>
   8
   9 #include <asm/errno.h>
  10
  11 #define CPU_PROFILING   1
  12 #define SCHED_PROFILING 2
  13 #define KVM_PROFILING   4
  14
  15 struct proc_dir_entry;
  16 struct notifier_block;
  17
  18 #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
  19 int create_proc_profile(void);
  20 #else
  21 static inline int create_proc_profile(void)
  22 {
  23         return 0;
  24 }
  25 #endif
  26
  27 #ifdef CONFIG_PROFILING
  28
  29 extern int prof_on __read_mostly;
  30
  31 /* init basic kernel profiler */
  32 int profile_init(void);
  33 int profile_setup(char *str);
  34 void profile_tick(int type);
  35 int setup_profiling_timer(unsigned int multiplier);
  36
  37 /*
  38  * Add multiple profiler hits to a given address:
  39  */
  40 void profile_hits(int type, void *ip, unsigned int nr_hits);
  41
  42 /*
  43  * Single profiler hit:
  44  */
  45 static inline void profile_hit(int type, void *ip)
  46 {
  47         /*
  48          * Speedup for the common (no profiling enabled) case:
  49          */
  50         if (unlikely(prof_on == type))
  51                 profile_hits(type, ip, 1);
  52 }
  53
  54 struct task_struct;
  55 struct mm_struct;
  56
  57 #else
  58
  59 #define prof_on 0
  60
  61 static inline int profile_init(void)
  62 {
  63         return 0;
  64 }
  65
  66 static inline void profile_tick(int type)
  67 {
  68         return;
  69 }
  70
  71 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
  72 {
  73         return;
  74 }
  75
  76 static inline void profile_hit(int type, void *ip)
  77 {
  78         return;
  79 }
  80
  81
  82 #endif /* CONFIG_PROFILING */
  83
  84 #endif /* _LINUX_PROFILE_H */