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ARM: vdso: Compile high resolution parts conditionally 

If the architected timer is disabled in the kernel configuration then let
the core VDSO code drop the high resolution parts at compile time.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20200207124402.622587341@linutronix.de
This commit is contained in:
Thomas Gleixner 2020-02-07 13:38:51 +01:00
parent 1dff4156d1
commit 3280badbe1
1 changed files with 6 additions and 0 deletions
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6
arch/arm/include/asm/vdso/gettimeofday.h
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@ -106,6 +106,12 @@ static __always_inline int clock_getres32_fallback(
return ret;
}
static inline bool arm_vdso_hres_capable(void)
{
return IS_ENABLED(CONFIG_ARM_ARCH_TIMER);
}
#define __arch_vdso_hres_capable arm_vdso_hres_capable
static __always_inline u64 __arch_get_hw_counter(int clock_mode)
{
#ifdef CONFIG_ARM_ARCH_TIMER