i8253: Convert i8253_lock to raw_spinlock

i8253_lock needs to be a real spinlock in preempt-rt, i.e. it can
not be converted to a sleeping lock.

Convert it to raw_spinlock and fix up all users.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Cc: Jens Axboe <jens.axboe@oracle.com>
LKML-Reference: <20100217163751.030764372@linutronix.de>

diff --git a/arch/mips/include/asm/i8253.h b/arch/mips/include/asm/i8253.h
index 032ca73..48bb823 100644 (file)
--- a/arch/mips/include/asm/i8253.h
+++ b/arch/mips/include/asm/i8253.h
@@ -12,7 +12,7 @@
 #define PIT_CH0                        0x40
 #define PIT_CH2                        0x42
 
-extern spinlock_t i8253_lock;
+extern raw_spinlock_t i8253_lock;
 
 extern void setup_pit_timer(void);
 

diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c
index ed5c441..9479406 100644 (file)
--- a/arch/mips/kernel/i8253.c
+++ b/arch/mips/kernel/i8253.c
@@ -15,7 +15,7 @@
 #include <asm/io.h>
 #include <asm/time.h>
 
-DEFINE_SPINLOCK(i8253_lock);
+DEFINE_RAW_SPINLOCK(i8253_lock);
 EXPORT_SYMBOL(i8253_lock);
 
 /*
@@ -26,7 +26,7 @@ EXPORT_SYMBOL(i8253_lock);
 static void init_pit_timer(enum clock_event_mode mode,
                           struct clock_event_device *evt)
 {
-       spin_lock(&i8253_lock);
+       raw_spin_lock(&i8253_lock);
 
        switch(mode) {
        case CLOCK_EVT_MODE_PERIODIC:
@@ -55,7 +55,7 @@ static void init_pit_timer(enum clock_event_mode mode,
                /* Nothing to do here */
                break;
        }
-       spin_unlock(&i8253_lock);
+       raw_spin_unlock(&i8253_lock);
 }
 
 /*
@@ -65,10 +65,10 @@ static void init_pit_timer(enum clock_event_mode mode,
  */
 static int pit_next_event(unsigned long delta, struct clock_event_device *evt)
 {
-       spin_lock(&i8253_lock);
+       raw_spin_lock(&i8253_lock);
        outb_p(delta & 0xff , PIT_CH0); /* LSB */
        outb(delta >> 8 , PIT_CH0);     /* MSB */
-       spin_unlock(&i8253_lock);
+       raw_spin_unlock(&i8253_lock);
 
        return 0;
 }
@@ -137,7 +137,7 @@ static cycle_t pit_read(struct clocksource *cs)
        static int old_count;
        static u32 old_jifs;
 
-       spin_lock_irqsave(&i8253_lock, flags);
+       raw_spin_lock_irqsave(&i8253_lock, flags);
        /*
         * Although our caller may have the read side of xtime_lock,
         * this is now a seqlock, and we are cheating in this routine
@@ -183,7 +183,7 @@ static cycle_t pit_read(struct clocksource *cs)
        old_count = count;
        old_jifs = jifs;
 
-       spin_unlock_irqrestore(&i8253_lock, flags);
+       raw_spin_unlock_irqrestore(&i8253_lock, flags);
 
        count = (LATCH - 1) - count;
 

diff --git a/arch/x86/include/asm/i8253.h b/arch/x86/include/asm/i8253.h
index 1edbf89..fc1f579 100644 (file)
--- a/arch/x86/include/asm/i8253.h
+++ b/arch/x86/include/asm/i8253.h
@@ -6,7 +6,7 @@
 #define PIT_CH0                        0x40
 #define PIT_CH2                        0x42
 
-extern spinlock_t i8253_lock;
+extern raw_spinlock_t i8253_lock;
 
 extern struct clock_event_device *global_clock_event;
 

diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 031aa88..c4f9182 100644 (file)
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -1224,7 +1224,7 @@ static void reinit_timer(void)
 #ifdef INIT_TIMER_AFTER_SUSPEND
        unsigned long flags;
 
-       spin_lock_irqsave(&i8253_lock, flags);
+       raw_spin_lock_irqsave(&i8253_lock, flags);
        /* set the clock to HZ */
        outb_pit(0x34, PIT_MODE);               /* binary, mode 2, LSB/MSB, ch 0 */
        udelay(10);
@@ -1232,7 +1232,7 @@ static void reinit_timer(void)
        udelay(10);
        outb_pit(LATCH >> 8, PIT_CH0);  /* MSB */
        udelay(10);
-       spin_unlock_irqrestore(&i8253_lock, flags);
+       raw_spin_unlock_irqrestore(&i8253_lock, flags);
 #endif
 }
 

diff --git a/arch/x86/kernel/i8253.c b/arch/x86/kernel/i8253.c
index 23c1679..2dfd315 100644 (file)
--- a/arch/x86/kernel/i8253.c
+++ b/arch/x86/kernel/i8253.c
@@ -16,7 +16,7 @@
 #include <asm/hpet.h>
 #include <asm/smp.h>
 
-DEFINE_SPINLOCK(i8253_lock);
+DEFINE_RAW_SPINLOCK(i8253_lock);
 EXPORT_SYMBOL(i8253_lock);
 
 /*
@@ -33,7 +33,7 @@ struct clock_event_device *global_clock_event;
 static void init_pit_timer(enum clock_event_mode mode,
                           struct clock_event_device *evt)
 {
-       spin_lock(&i8253_lock);
+       raw_spin_lock(&i8253_lock);
 
        switch (mode) {
        case CLOCK_EVT_MODE_PERIODIC:
@@ -62,7 +62,7 @@ static void init_pit_timer(enum clock_event_mode mode,
                /* Nothing to do here */
                break;
        }
-       spin_unlock(&i8253_lock);
+       raw_spin_unlock(&i8253_lock);
 }
 
 /*
@@ -72,10 +72,10 @@ static void init_pit_timer(enum clock_event_mode mode,
  */
 static int pit_next_event(unsigned long delta, struct clock_event_device *evt)
 {
-       spin_lock(&i8253_lock);
+       raw_spin_lock(&i8253_lock);
        outb_pit(delta & 0xff , PIT_CH0);       /* LSB */
        outb_pit(delta >> 8 , PIT_CH0);         /* MSB */
-       spin_unlock(&i8253_lock);
+       raw_spin_unlock(&i8253_lock);
 
        return 0;
 }
@@ -130,7 +130,7 @@ static cycle_t pit_read(struct clocksource *cs)
        int count;
        u32 jifs;
 
-       spin_lock_irqsave(&i8253_lock, flags);
+       raw_spin_lock_irqsave(&i8253_lock, flags);
        /*
         * Although our caller may have the read side of xtime_lock,
         * this is now a seqlock, and we are cheating in this routine
@@ -176,7 +176,7 @@ static cycle_t pit_read(struct clocksource *cs)
        old_count = count;
        old_jifs = jifs;
 
-       spin_unlock_irqrestore(&i8253_lock, flags);
+       raw_spin_unlock_irqrestore(&i8253_lock, flags);
 
        count = (LATCH - 1) - count;
 

diff --git a/drivers/block/hd.c b/drivers/block/hd.c
index 5116c65..b9868ad 100644 (file)
--- a/drivers/block/hd.c
+++ b/drivers/block/hd.c
@@ -165,12 +165,12 @@ unsigned long read_timer(void)
        unsigned long t, flags;
        int i;
 
-       spin_lock_irqsave(&i8253_lock, flags);
+       raw_spin_lock_irqsave(&i8253_lock, flags);
        t = jiffies * 11932;
        outb_p(0, 0x43);
        i = inb_p(0x40);
        i |= inb(0x40) << 8;
-       spin_unlock_irqrestore(&i8253_lock, flags);
+       raw_spin_unlock_irqrestore(&i8253_lock, flags);
        return(t - i);
 }
 #endif

diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index 7e18bcf..46239e4 100644 (file)
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -59,11 +59,11 @@ static unsigned int get_time_pit(void)
        unsigned long flags;
        unsigned int count;
 
-       spin_lock_irqsave(&i8253_lock, flags);
+       raw_spin_lock_irqsave(&i8253_lock, flags);
        outb_p(0x00, 0x43);
        count = inb_p(0x40);
        count |= inb_p(0x40) << 8;
-       spin_unlock_irqrestore(&i8253_lock, flags);
+       raw_spin_unlock_irqrestore(&i8253_lock, flags);
 
        return count;
 }

diff --git a/drivers/input/joystick/analog.c b/drivers/input/joystick/analog.c
index 1c0b529..4afe0a3 100644 (file)
--- a/drivers/input/joystick/analog.c
+++ b/drivers/input/joystick/analog.c
@@ -146,11 +146,11 @@ static unsigned int get_time_pit(void)
         unsigned long flags;
         unsigned int count;
 
-        spin_lock_irqsave(&i8253_lock, flags);
+        raw_spin_lock_irqsave(&i8253_lock, flags);
         outb_p(0x00, 0x43);
         count = inb_p(0x40);
         count |= inb_p(0x40) << 8;
-        spin_unlock_irqrestore(&i8253_lock, flags);
+        raw_spin_unlock_irqrestore(&i8253_lock, flags);
 
         return count;
 }

diff --git a/drivers/input/misc/pcspkr.c b/drivers/input/misc/pcspkr.c
index ea4e1fd..f080dd3 100644 (file)
--- a/drivers/input/misc/pcspkr.c
+++ b/drivers/input/misc/pcspkr.c
@@ -30,7 +30,7 @@ MODULE_ALIAS("platform:pcspkr");
 #include <asm/i8253.h>
 #else
 #include <asm/8253pit.h>
-static DEFINE_SPINLOCK(i8253_lock);
+static DEFINE_RAW_SPINLOCK(i8253_lock);
 #endif
 
 static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
@@ -50,7 +50,7 @@ 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_lock, flags);
+       raw_spin_lock_irqsave(&i8253_lock, flags);
 
        if (count) {
                /* set command for counter 2, 2 byte write */
@@ -65,7 +65,7 @@ static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int c
                outb(inb_p(0x61) & 0xFC, 0x61);
        }
 
-       spin_unlock_irqrestore(&i8253_lock, flags);
+       raw_spin_unlock_irqrestore(&i8253_lock, flags);
 
        return 0;
 }

diff --git a/sound/drivers/pcsp/pcsp.h b/sound/drivers/pcsp/pcsp.h
index 1e12307..4ff6c8c 100644 (file)
--- a/sound/drivers/pcsp/pcsp.h
+++ b/sound/drivers/pcsp/pcsp.h
@@ -16,7 +16,7 @@
 #include <asm/i8253.h>
 #else
 #include <asm/8253pit.h>
-static DEFINE_SPINLOCK(i8253_lock);
+static DEFINE_RAW_SPINLOCK(i8253_lock);
 #endif
 
 #define PCSP_SOUND_VERSION 0x400       /* read 4.00 */

diff --git a/sound/drivers/pcsp/pcsp_input.c b/sound/drivers/pcsp/pcsp_input.c
index 0444cde..b5e2b54 100644 (file)
--- a/sound/drivers/pcsp/pcsp_input.c
+++ b/sound/drivers/pcsp/pcsp_input.c
@@ -21,7 +21,7 @@ static void pcspkr_do_sound(unsigned int count)
 {
        unsigned long flags;
 
-       spin_lock_irqsave(&i8253_lock, flags);
+       raw_spin_lock_irqsave(&i8253_lock, flags);
 
        if (count) {
                /* set command for counter 2, 2 byte write */
@@ -36,7 +36,7 @@ static void pcspkr_do_sound(unsigned int count)
                outb(inb_p(0x61) & 0xFC, 0x61);
        }
 
-       spin_unlock_irqrestore(&i8253_lock, flags);
+       raw_spin_unlock_irqrestore(&i8253_lock, flags);
 }
 
 void pcspkr_stop_sound(void)

diff --git a/sound/drivers/pcsp/pcsp_lib.c b/sound/drivers/pcsp/pcsp_lib.c
index e1145ac..f6a2e72 100644 (file)
--- a/sound/drivers/pcsp/pcsp_lib.c
+++ b/sound/drivers/pcsp/pcsp_lib.c
@@ -65,7 +65,7 @@ static u64 pcsp_timer_update(struct snd_pcsp *chip)
        timer_cnt = val * CUR_DIV() / 256;
 
        if (timer_cnt && chip->enable) {
-               spin_lock_irqsave(&i8253_lock, flags);
+               raw_spin_lock_irqsave(&i8253_lock, flags);
                if (!nforce_wa) {
                        outb_p(chip->val61, 0x61);
                        outb_p(timer_cnt, 0x42);
@@ -74,7 +74,7 @@ static u64 pcsp_timer_update(struct snd_pcsp *chip)
                        outb(chip->val61 ^ 2, 0x61);
                        chip->thalf = 1;
                }
-               spin_unlock_irqrestore(&i8253_lock, flags);
+               raw_spin_unlock_irqrestore(&i8253_lock, flags);
        }
 
        chip->ns_rem = PCSP_PERIOD_NS();
@@ -158,10 +158,10 @@ static int pcsp_start_playing(struct snd_pcsp *chip)
                return -EIO;
        }
 
-       spin_lock(&i8253_lock);
+       raw_spin_lock(&i8253_lock);
        chip->val61 = inb(0x61) | 0x03;
        outb_p(0x92, 0x43);     /* binary, mode 1, LSB only, ch 2 */
-       spin_unlock(&i8253_lock);
+       raw_spin_unlock(&i8253_lock);
        atomic_set(&chip->timer_active, 1);
        chip->thalf = 0;
 
@@ -178,11 +178,11 @@ static void pcsp_stop_playing(struct snd_pcsp *chip)
                return;
 
        atomic_set(&chip->timer_active, 0);
-       spin_lock(&i8253_lock);
+       raw_spin_lock(&i8253_lock);
        /* restore the timer */
        outb_p(0xb6, 0x43);     /* binary, mode 3, LSB/MSB, ch 2 */
        outb(chip->val61 & 0xFC, 0x61);
-       spin_unlock(&i8253_lock);
+       raw_spin_unlock(&i8253_lock);
 }
 
 /*