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 <[email protected]> Tested-by: Vincenzo Frascino <[email protected]> Reviewed-by: Vincenzo Frascino <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
wafgo · Feb 17, 2020 · 3280bad · 3280bad
1 parent 1dff415
commit 3280bad
Showing 1 changed file with 6 additions and 0 deletions.
diff --git 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_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