From f5e0e93faf8421083853b2d7a217267f49e27cc3 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 12 Oct 2007 23:04:06 +0200 Subject: [PATCH] i386: prepare sharing the PIT code PIT clock events work already and the PIT handling is the same for i386 and x86_64. x86_64 does not support PIT as a clock source, so disable the PIT clocksource for x86_64. Prepare i8253.h to be shared with x8664 Signed-off-by: Thomas Gleixner Signed-off-by: Chris Wright Signed-off-by: Ingo Molnar Signed-off-by: Arjan van de Ven --- arch/x86/kernel/i8253_32.c | 4 +++- include/asm-x86/i8253_32.h | 6 ++++-- 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/i8253_32.c b/arch/x86/kernel/i8253_32.c index 6d839f2f1b1a..ac15e4cbd9c1 100644 --- a/arch/x86/kernel/i8253_32.c +++ b/arch/x86/kernel/i8253_32.c @@ -13,7 +13,6 @@ #include #include #include -#include DEFINE_SPINLOCK(i8253_lock); EXPORT_SYMBOL(i8253_lock); @@ -120,6 +119,7 @@ void __init setup_pit_timer(void) global_clock_event = &pit_clockevent; } +#ifndef CONFIG_X86_64 /* * Since the PIT overflows every tick, its not very useful * to just read by itself. So use jiffies to emulate a free @@ -204,3 +204,5 @@ static int __init init_pit_clocksource(void) return clocksource_register(&clocksource_pit); } arch_initcall(init_pit_clocksource); + +#endif diff --git a/include/asm-x86/i8253_32.h b/include/asm-x86/i8253_32.h index 7577d058d86e..28cf67da59a3 100644 --- a/include/asm-x86/i8253_32.h +++ b/include/asm-x86/i8253_32.h @@ -1,8 +1,6 @@ #ifndef __ASM_I8253_H__ #define __ASM_I8253_H__ -#include - /* i8253A PIT registers */ #define PIT_MODE 0x43 #define PIT_CH0 0x40 @@ -10,8 +8,12 @@ extern spinlock_t i8253_lock; +#ifdef CONFIG_GENERIC_CLOCKEVENTS + extern struct clock_event_device *global_clock_event; extern void setup_pit_timer(void); +#endif + #endif /* __ASM_I8253_H__ */ -- 2.34.1