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s390/time: Use monotonic clock in get_cycles()

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[ Upstream commit 09e7e29d2b49ba84bcefb3dc1657726d2de5bb24 ]

Otherwise the code might not work correctly when the clock
is changed.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sven Schnelle 2025-07-10 09:42:29 +02:00 • committed by Greg Kroah-Hartman
commit 92d523fac8
1 changed files with 6 additions and 7 deletions
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13
arch/s390/include/asm/timex.h
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@ -172,13 +172,6 @@ static inline unsigned long long get_tod_clock_fast(void)
return get_tod_clock();
#endif
}
static inline cycles_t get_cycles(void)
{
return (cycles_t) get_tod_clock() >> 2;
}
#define get_cycles get_cycles
int get_phys_clock(unsigned long *clock);
void init_cpu_timer(void);
unsigned long long monotonic_clock(void);
@ -202,6 +195,12 @@ static inline unsigned long long get_tod_clock_monotonic(void)
return tod;
}
static inline cycles_t get_cycles(void)
{
return (cycles_t)get_tod_clock_monotonic() >> 2;
}
#define get_cycles get_cycles
/**
* tod_to_ns - convert a TOD format value to nanoseconds
* @todval: to be converted TOD format value