We get a warning when building kernel with W=1:
arch/x86/kernel/tsc.c:1497:15: warning: no previous prototype for
‘calibrate_delay_is_known’ [-Wmissing-prototypes]
unsigned long calibrate_delay_is_known(void)
^
Add the missing declaration in head file to fix this.
Signed-off-by: Yi Wang <wang.y...@zte.com.cn>
---
arch/x86/include/asm/tsc.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h
index eb5bbfe..8a0c25c 100644
--- a/arch/x86/include/asm/tsc.h
+++ b/arch/x86/include/asm/tsc.h
@@ -35,6 +35,7 @@ static inline cycles_t get_cycles(void)
extern void tsc_early_init(void);
extern void tsc_init(void);
+extern unsigned long calibrate_delay_is_known(void);
extern void mark_tsc_unstable(char *reason);
extern int unsynchronized_tsc(void);
extern int check_tsc_unstable(void);
--
1.8.3.1
