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vdso: Consolidate vdso_calc_delta()

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Consolidate vdso_calc_delta(), in preparation for further simplification.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240325064023.2997-2-adrian.hunter@intel.com
This commit is contained in:
Adrian Hunter
2024-03-25 08:40:05 +02:00
committed by Thomas Gleixner
parent 82ccdf062a
commit c8e3a8b6f2
3 changed files with 21 additions and 21 deletions
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9
lib/vdso/gettimeofday.c
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@@ -6,6 +6,13 @@
#include <vdso/helpers.h>
#ifndef vdso_calc_delta
#ifdef VDSO_DELTA_NOMASK
# define VDSO_DELTA_MASK(mask) U64_MAX
#else
# define VDSO_DELTA_MASK(mask) (mask)
#endif
/*
* Default implementation which works for all sane clocksources. That
* obviously excludes x86/TSC.
@@ -13,7 +20,7 @@
static __always_inline
u64 vdso_calc_delta(u64 cycles, u64 last, u64 mask, u32 mult)
{
return ((cycles - last) & mask) * mult;
return ((cycles - last) & VDSO_DELTA_MASK(mask)) * mult;
}
#endif