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-rw-r--r--arch/sh/kernel/time.c13
-rw-r--r--arch/sh/kernel/timers/timer-cmt.c9
-rw-r--r--arch/sh/kernel/timers/timer-mtu2.c10
-rw-r--r--arch/sh/kernel/timers/timer-tmu.c9
4 files changed, 12 insertions, 29 deletions
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index 57e708d7b52d..c55d6f217a46 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -50,15 +50,20 @@ unsigned long long __attribute__ ((weak)) sched_clock(void)
#ifndef CONFIG_GENERIC_TIME
void do_gettimeofday(struct timeval *tv)
{
+ unsigned long flags;
unsigned long seq;
unsigned long usec, sec;
do {
- seq = read_seqbegin(&xtime_lock);
+ /*
+ * Turn off IRQs when grabbing xtime_lock, so that
+ * the sys_timer get_offset code doesn't have to handle it.
+ */
+ seq = read_seqbegin_irqsave(&xtime_lock, flags);
usec = get_timer_offset();
sec = xtime.tv_sec;
- usec += xtime.tv_nsec / 1000;
- } while (read_seqretry(&xtime_lock, seq));
+ usec += xtime.tv_nsec / NSEC_PER_USEC;
+ } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
while (usec >= 1000000) {
usec -= 1000000;
@@ -85,7 +90,7 @@ int do_settimeofday(struct timespec *tv)
* wall time. Discover what correction gettimeofday() would have
* made, and then undo it!
*/
- nsec -= 1000 * get_timer_offset();
+ nsec -= get_timer_offset() * NSEC_PER_USEC;
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
diff --git a/arch/sh/kernel/timers/timer-cmt.c b/arch/sh/kernel/timers/timer-cmt.c
index 24b03996da51..95581dccbbfd 100644
--- a/arch/sh/kernel/timers/timer-cmt.c
+++ b/arch/sh/kernel/timers/timer-cmt.c
@@ -11,7 +11,6 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
-#include <linux/spinlock.h>
#include <linux/seqlock.h>
#include <asm/timer.h>
#include <asm/rtc.h>
@@ -46,13 +45,9 @@
#error "Unknown CPU SUBTYPE"
#endif
-static DEFINE_SPINLOCK(cmt0_lock);
-
static unsigned long cmt_timer_get_offset(void)
{
int count;
- unsigned long flags;
-
static unsigned short count_p = 0xffff; /* for the first call after boot */
static unsigned long jiffies_p = 0;
@@ -61,7 +56,6 @@ static unsigned long cmt_timer_get_offset(void)
*/
unsigned long jiffies_t;
- spin_lock_irqsave(&cmt0_lock, flags);
/* timer count may underflow right here */
count = ctrl_inw(CMT_CMCOR_0);
count -= ctrl_inw(CMT_CMCNT_0);
@@ -88,7 +82,6 @@ static unsigned long cmt_timer_get_offset(void)
jiffies_p = jiffies_t;
count_p = count;
- spin_unlock_irqrestore(&cmt0_lock, flags);
count = ((LATCH-1) - count) * TICK_SIZE;
count = (count + LATCH/2) / LATCH;
@@ -122,7 +115,7 @@ static irqreturn_t cmt_timer_interrupt(int irq, void *dev_id)
static struct irqaction cmt_irq = {
.name = "timer",
.handler = cmt_timer_interrupt,
- .flags = IRQF_DISABLED,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
.mask = CPU_MASK_NONE,
};
diff --git a/arch/sh/kernel/timers/timer-mtu2.c b/arch/sh/kernel/timers/timer-mtu2.c
index 92c98b5b11ea..201f0a62132f 100644
--- a/arch/sh/kernel/timers/timer-mtu2.c
+++ b/arch/sh/kernel/timers/timer-mtu2.c
@@ -12,7 +12,6 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
-#include <linux/spinlock.h>
#include <linux/seqlock.h>
#include <asm/timer.h>
#include <asm/io.h>
@@ -28,9 +27,6 @@
* However, we can implement channel cascade if we go the overflow route and
* get away with using 2 MTU2 channels as a 32-bit timer.
*/
-
-static DEFINE_SPINLOCK(mtu2_lock);
-
#define MTU2_TSTR 0xfffe4280
#define MTU2_TCR_1 0xfffe4380
#define MTU2_TMDR_1 0xfffe4381
@@ -55,8 +51,6 @@ static DEFINE_SPINLOCK(mtu2_lock);
static unsigned long mtu2_timer_get_offset(void)
{
int count;
- unsigned long flags;
-
static int count_p = 0x7fff; /* for the first call after boot */
static unsigned long jiffies_p = 0;
@@ -65,7 +59,6 @@ static unsigned long mtu2_timer_get_offset(void)
*/
unsigned long jiffies_t;
- spin_lock_irqsave(&mtu2_lock, flags);
/* timer count may underflow right here */
count = ctrl_inw(MTU2_TCNT_1); /* read the latched count */
@@ -90,7 +83,6 @@ static unsigned long mtu2_timer_get_offset(void)
jiffies_p = jiffies_t;
count_p = count;
- spin_unlock_irqrestore(&mtu2_lock, flags);
count = ((LATCH-1) - count) * TICK_SIZE;
count = (count + LATCH/2) / LATCH;
@@ -118,7 +110,7 @@ static irqreturn_t mtu2_timer_interrupt(int irq, void *dev_id)
static struct irqaction mtu2_irq = {
.name = "timer",
.handler = mtu2_timer_interrupt,
- .flags = IRQF_DISABLED,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
.mask = CPU_MASK_NONE,
};
diff --git a/arch/sh/kernel/timers/timer-tmu.c b/arch/sh/kernel/timers/timer-tmu.c
index 06a70db7386d..b9ed8a387555 100644
--- a/arch/sh/kernel/timers/timer-tmu.c
+++ b/arch/sh/kernel/timers/timer-tmu.c
@@ -17,7 +17,6 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
-#include <linux/spinlock.h>
#include <linux/seqlock.h>
#include <asm/timer.h>
#include <asm/rtc.h>
@@ -31,13 +30,9 @@
#define TMU0_TCR_CALIB 0x0000
-static DEFINE_SPINLOCK(tmu0_lock);
-
static unsigned long tmu_timer_get_offset(void)
{
int count;
- unsigned long flags;
-
static int count_p = 0x7fffffff; /* for the first call after boot */
static unsigned long jiffies_p = 0;
@@ -46,7 +41,6 @@ static unsigned long tmu_timer_get_offset(void)
*/
unsigned long jiffies_t;
- spin_lock_irqsave(&tmu0_lock, flags);
/* timer count may underflow right here */
count = ctrl_inl(TMU0_TCNT); /* read the latched count */
@@ -72,7 +66,6 @@ static unsigned long tmu_timer_get_offset(void)
jiffies_p = jiffies_t;
count_p = count;
- spin_unlock_irqrestore(&tmu0_lock, flags);
count = ((LATCH-1) - count) * TICK_SIZE;
count = (count + LATCH/2) / LATCH;
@@ -106,7 +99,7 @@ static irqreturn_t tmu_timer_interrupt(int irq, void *dummy)
static struct irqaction tmu_irq = {
.name = "timer",
.handler = tmu_timer_interrupt,
- .flags = IRQF_DISABLED,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
.mask = CPU_MASK_NONE,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 23:17:32 +0100