forked from mirrors/linux
af9abd6598
clock_getres in the vDSO library has to preserve the same behaviour
of posix_get_hrtimer_res().
In particular, posix_get_hrtimer_res() does:
sec = 0;
ns = hrtimer_resolution;
and hrtimer_resolution depends on the enablement of the high
resolution timers that can happen either at compile or at run time.
Fix the nds32 vdso implementation of clock_getres keeping a copy of
hrtimer_resolution in vdso data and using that directly.
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2012 ARM Limited
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __ASM_VDSO_DATAPAGE_H
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#define __ASM_VDSO_DATAPAGE_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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struct vdso_data {
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bool cycle_count_down; /* timer cyclye counter is decrease with time */
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u32 cycle_count_offset; /* offset of timer cycle counter register */
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u32 seq_count; /* sequence count - odd during updates */
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u32 xtime_coarse_sec; /* coarse time */
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u32 xtime_coarse_nsec;
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u32 wtm_clock_sec; /* wall to monotonic offset */
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u32 wtm_clock_nsec;
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u32 xtime_clock_sec; /* CLOCK_REALTIME - seconds */
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u32 cs_mult; /* clocksource multiplier */
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u32 cs_shift; /* Cycle to nanosecond divisor (power of two) */
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u32 hrtimer_res; /* hrtimer resolution */
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u64 cs_cycle_last; /* last cycle value */
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u64 cs_mask; /* clocksource mask */
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u64 xtime_clock_nsec; /* CLOCK_REALTIME sub-ns base */
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u32 tz_minuteswest; /* timezone info for gettimeofday(2) */
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u32 tz_dsttime;
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};
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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* __ASM_VDSO_DATAPAGE_H */
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