[patch V2 04/17] ARM: vdso: Compile high resolution parts conditionally

From: Thomas Gleixner
Date: Fri Feb 07 2020 - 08:26:00 EST


From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

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@xxxxxxxxxxxxx>

---
arch/arm/include/asm/vdso/gettimeofday.h | 6 ++++++
1 file changed, 6 insertions(+)

--- a/arch/arm/include/asm/vdso/gettimeofday.h
+++ b/arch/arm/include/asm/vdso/gettimeofday.h
@@ -106,6 +106,12 @@ static __always_inline int clock_getres3
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