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i8253: Consolidate all kernel definitions of i8253_lock 

Move them to drivers/clocksource/i8253.c and remove the
implementations in arch/

[ tglx: Avoid the extra file in lib - folded arch patches in. The
  export will become conditional in a later step ]

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Link: http://lkml.kernel.org/r/20110601180610.221426078@duck.linux-mips.net
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ralf Baechle 2011-06-01 19:04:59 +01:00 committed by Thomas Gleixner
parent cb2455aa27
commit 15f304b664
8 changed files with 21 additions and 10 deletions
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2
arch/arm/mach-footbridge/isa-timer.c
View File

@ -19,8 +19,6 @@
#include "common.h"
DEFINE_RAW_SPINLOCK(i8253_lock);
static void pit_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{

3
arch/mips/kernel/i8253.c
View File

@ -16,9 +16,6 @@
#include <asm/io.h>
#include <asm/time.h>
DEFINE_RAW_SPINLOCK(i8253_lock);
EXPORT_SYMBOL(i8253_lock);
/*
* Initialize the PIT timer.
*

1
arch/x86/Kconfig
View File

@ -70,6 +70,7 @@ config X86
select IRQ_FORCED_THREADING
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_BPF_JIT if (X86_64 && NET)
select I8253_LOCK
config INSTRUCTION_DECODER
def_bool (KPROBES || PERF_EVENTS)

3
arch/x86/kernel/i8253.c
View File

@ -16,9 +16,6 @@
#include <asm/hpet.h>
#include <asm/smp.h>
DEFINE_RAW_SPINLOCK(i8253_lock);
EXPORT_SYMBOL(i8253_lock);
/*
* HPET replaces the PIT, when enabled. So we need to know, which of
* the two timers is used

6
drivers/clocksource/Kconfig
View File

@ -1,5 +1,11 @@
config CLKSRC_I8253
bool
config I8253_LOCK
bool
config CLKBLD_I8253
def_bool y if CLKSRC_I8253 || I8253_LOCK
config CLKSRC_MMIO
bool

2
drivers/clocksource/Makefile
View File

@ -6,5 +6,5 @@ obj-$(CONFIG_CS5535_CLOCK_EVENT_SRC) += cs5535-clockevt.o
obj-$(CONFIG_SH_TIMER_CMT) += sh_cmt.o
obj-$(CONFIG_SH_TIMER_MTU2) += sh_mtu2.o
obj-$(CONFIG_SH_TIMER_TMU) += sh_tmu.o
obj-$(CONFIG_CLKSRC_I8253) += i8253.o
obj-$(CONFIG_CLKBLD_I8253) += i8253.o
obj-$(CONFIG_CLKSRC_MMIO) += mmio.o

13
drivers/clocksource/i8253.c
View File

@ -6,9 +6,19 @@
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/timex.h>
#include <linux/module.h>
#include <linux/i8253.h>
/*
* Protects access to I/O ports
*
* 0040-0043 : timer0, i8253 / i8254
* 0061-0061 : NMI Control Register which contains two speaker control bits.
*/
DEFINE_RAW_SPINLOCK(i8253_lock);
EXPORT_SYMBOL(i8253_lock);
#ifdef CONFIG_CLKSRC_I8253
/*
* Since the PIT overflows every tick, its not very useful
* to just read by itself. So use jiffies to emulate a free
@ -86,3 +96,4 @@ int __init clocksource_i8253_init(void)
{
return clocksource_register_hz(&i8253_cs, PIT_TICK_RATE);
}
#endif

1
init/Kconfig
View File

@ -1002,6 +1002,7 @@ config ELF_CORE
config PCSPKR_PLATFORM
bool "Enable PC-Speaker support" if EXPERT
depends on ALPHA || X86 || MIPS || PPC_PREP || PPC_CHRP || PPC_PSERIES
select I8253_LOCK
default y
help
This option allows to disable the internal PC-Speaker