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authorVincenzo Frascino <vincenzo.frascino@arm.com>2019-04-01 12:51:51 +0100
committerGreentime Hu <greentime@andestech.com>2019-05-16 15:07:08 +0800
commitaf9abd65983cf3602c03ef3d16fe549ba1f3eeed (patch)
tree165b6a5c5fa21f59a9d89724ae24573d16f106f7 /arch/nds32/include
parent63e07e202997ca01336ac93bf45dfd2c3a6ec512 (diff)
nds32: Fix vDSO clock_getres()
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>
Diffstat (limited to 'arch/nds32/include')
-rw-r--r--arch/nds32/include/asm/vdso_datapage.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/vdso_datapage.h b/arch/nds32/include/asm/vdso_datapage.h
index cd1dda3da0f9..74c68802021e 100644
--- a/arch/nds32/include/asm/vdso_datapage.h
+++ b/arch/nds32/include/asm/vdso_datapage.h
@@ -20,6 +20,7 @@ struct vdso_data {
u32 xtime_clock_sec; /* CLOCK_REALTIME - seconds */
u32 cs_mult; /* clocksource multiplier */
u32 cs_shift; /* Cycle to nanosecond divisor (power of two) */
+ u32 hrtimer_res; /* hrtimer resolution */
u64 cs_cycle_last; /* last cycle value */
u64 cs_mask; /* clocksource mask */