summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2007-07-21 17:11:18 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-21 18:37:12 -0700
commit28318daf791b692f2654cb9c89687388063bd42b (patch)
tree6ec7b7d3862c513135455156d17c738ec15aebf7
parent021daae2c265a844fd27bb6cc49c2bd114571069 (diff)
downloadlinux-28318daf791b692f2654cb9c89687388063bd42b.tar.gz
linux-28318daf791b692f2654cb9c89687388063bd42b.tar.bz2
linux-28318daf791b692f2654cb9c89687388063bd42b.zip
x86_64: use the global PIT lock
Replace the pcspkr private PIT lock by the global PIT lock to serialize the PIT access all over the place. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/x86_64/kernel/time.c2
-rw-r--r--drivers/input/misc/pcspkr.c11
-rw-r--r--include/asm-x86_64/i8253.h6
3 files changed, 16 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c
index 3c34e8def89d..6d48a4e826d9 100644
--- a/arch/x86_64/kernel/time.c
+++ b/arch/x86_64/kernel/time.c
@@ -33,6 +33,7 @@
#include <acpi/acpi_bus.h>
#endif
#include <asm/8253pit.h>
+#include <asm/i8253.h>
#include <asm/pgtable.h>
#include <asm/vsyscall.h>
#include <asm/timex.h>
@@ -51,6 +52,7 @@ static char *timename = NULL;
DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL(rtc_lock);
DEFINE_SPINLOCK(i8253_lock);
+EXPORT_SYMBOL(i8253_lock);
volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
diff --git a/drivers/input/misc/pcspkr.c b/drivers/input/misc/pcspkr.c
index 31989dcd922c..906bf5e8de89 100644
--- a/drivers/input/misc/pcspkr.c
+++ b/drivers/input/misc/pcspkr.c
@@ -24,7 +24,12 @@ MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("PC Speaker beeper driver");
MODULE_LICENSE("GPL");
-static DEFINE_SPINLOCK(i8253_beep_lock);
+#ifdef CONFIG_X86
+/* Use the global PIT lock ! */
+#include <asm/i8253.h>
+#else
+static DEFINE_SPINLOCK(i8253_lock);
+#endif
static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
@@ -43,7 +48,7 @@ static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int c
if (value > 20 && value < 32767)
count = PIT_TICK_RATE / value;
- spin_lock_irqsave(&i8253_beep_lock, flags);
+ spin_lock_irqsave(&i8253_lock, flags);
if (count) {
/* enable counter 2 */
@@ -58,7 +63,7 @@ static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int c
outb(inb_p(0x61) & 0xFC, 0x61);
}
- spin_unlock_irqrestore(&i8253_beep_lock, flags);
+ spin_unlock_irqrestore(&i8253_lock, flags);
return 0;
}
diff --git a/include/asm-x86_64/i8253.h b/include/asm-x86_64/i8253.h
new file mode 100644
index 000000000000..015d8df07690
--- /dev/null
+++ b/include/asm-x86_64/i8253.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_I8253_H__
+#define __ASM_I8253_H__
+
+extern spinlock_t i8253_lock;
+
+#endif /* __ASM_I8253_H__ */