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s390/oprofile: fix compile error

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Fix these errors when compiling with CONFIG_OPROFILE=y and
CONFIG_PERF_EVENTS=n:
arch/s390/oprofile/init.c: In function ‘oprofile_hwsampler_start’:
arch/s390/oprofile/init.c:93:2: error: implicit declaration of function 'perf_reserve_sampling' [-Werror=implicit-function-declaration]
  retval = perf_reserve_sampling();
  ^
arch/s390/oprofile/init.c:99:3: error: implicit declaration of function 'perf_release_sampling' [-Werror=implicit-function-declaration]
   perf_release_sampling();
   ^

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott
2015-06-25 14:52:13 +02:00
committed by Martin Schwidefsky
parent a313bdc531
commit a215c8fbde
2 changed files with 9 additions and 0 deletions
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8
arch/s390/include/asm/perf_event.h
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@@ -87,7 +87,15 @@ struct sf_raw_sample {
} __packed;
/* Perf hardware reserve and release functions */
#ifdef CONFIG_PERF_EVENTS
int perf_reserve_sampling(void);
void perf_release_sampling(void);
#else /* CONFIG_PERF_EVENTS */
static inline int perf_reserve_sampling(void)
{
return 0;
}
static inline void perf_release_sampling(void) {}
#endif /* CONFIG_PERF_EVENTS */
#endif /* _ASM_S390_PERF_EVENT_H */