x86: Select HAS_PERSISTENT_CLOCK on x86

Select HAS_PERSISTENT_CLOCK on x86 to simplify RTC options
and allow the compiler to remove unused code.

Signed-off-by: John Stultz <john.stultz@linaro.org>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 46c3bff..a4135b5 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -108,6 +108,7 @@ config X86
        select GENERIC_STRNLEN_USER
        select HAVE_RCU_USER_QS if X86_64
        select HAVE_IRQ_TIME_ACCOUNTING
+       select HAS_PERSISTENT_CLOCK
        select GENERIC_KERNEL_THREAD
        select GENERIC_KERNEL_EXECVE
        select MODULES_USE_ELF_REL if X86_32