[patch 4/5] xtime_lock: Convert to raw_seqlock

From: Thomas Gleixner
Date: Wed Feb 17 2010 - 13:48:31 EST

xtime_lock needs a raw_spinlock in preempt-rt. Convert it to
raw_seqlock and fix up all users.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/alpha/kernel/time.c | 4 +--
arch/arm/kernel/time.c | 12 +++++-----
arch/blackfin/kernel/time.c | 4 +--
arch/cris/kernel/time.c | 4 +--
arch/frv/kernel/time.c | 4 +--
arch/h8300/kernel/time.c | 4 +--
arch/ia64/kernel/time.c | 8 +++---
arch/ia64/xen/time.c | 4 +--
arch/m32r/kernel/time.c | 4 +--
arch/m68knommu/kernel/time.c | 4 +--
arch/mn10300/kernel/time.c | 4 +--
arch/parisc/kernel/time.c | 8 +++---
arch/powerpc/kernel/time.c | 4 +--
arch/sparc/kernel/pcic.c | 4 +--
arch/sparc/kernel/time_32.c | 4 +--
arch/xtensa/kernel/time.c | 4 +--
include/linux/time.h | 2 -
kernel/hrtimer.c | 8 +++---
kernel/time.c | 8 +++---
kernel/time/ntp.c | 8 +++---
kernel/time/tick-common.c | 8 +++---
kernel/time/tick-sched.c | 12 +++++-----
kernel/time/timekeeping.c | 51 +++++++++++++++++++++----------------------
23 files changed, 88 insertions(+), 89 deletions(-)

Index: linux-2.6-tip/arch/alpha/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/alpha/kernel/time.c
+++ linux-2.6-tip/arch/alpha/kernel/time.c
@@ -106,7 +106,7 @@ irqreturn_t timer_interrupt(int irq, voi
profile_tick(CPU_PROFILING);
#endif

- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

/*
* Calculate how many ticks have passed since the last update,
@@ -136,7 +136,7 @@ irqreturn_t timer_interrupt(int irq, voi
state.last_rtc_update = xtime.tv_sec - (tmp ? 600 : 0);
}

- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);

#ifndef CONFIG_SMP
while (nticks--)
Index: linux-2.6-tip/arch/arm/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/arm/kernel/time.c
+++ linux-2.6-tip/arch/arm/kernel/time.c
@@ -245,11 +245,11 @@ void do_gettimeofday(struct timeval *tv)
unsigned long usec, sec;

do {
- seq = read_seqbegin_irqsave(&xtime_lock, flags);
+ seq = read_raw_seqbegin_irqsave(&xtime_lock, flags);
usec = system_timer->offset();
sec = xtime.tv_sec;
usec += xtime.tv_nsec / 1000;
- } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
+ } while (read_raw_seqretry_irqrestore(&xtime_lock, seq, flags));

/* usec may have gone up a lot: be safe */
while (usec >= 1000000) {
@@ -271,7 +271,7 @@ int do_settimeofday(struct timespec *tv)
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;

- write_seqlock_irq(&xtime_lock);
+ write_raw_seqlock_irq(&xtime_lock);
/*
* This is revolting. We need to set "xtime" correctly. However, the
* value in this location is the value at the most recent update of
@@ -287,7 +287,7 @@ int do_settimeofday(struct timespec *tv)
set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);

ntp_clear();
- write_sequnlock_irq(&xtime_lock);
+ write_raw_sequnlock_irq(&xtime_lock);
clock_was_set();
return 0;
}
@@ -337,9 +337,9 @@ void timer_tick(void)
profile_tick(CPU_PROFILING);
do_leds();
do_set_rtc();
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
do_timer(1);
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
#endif
Index: linux-2.6-tip/arch/blackfin/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/blackfin/kernel/time.c
+++ linux-2.6-tip/arch/blackfin/kernel/time.c
@@ -129,7 +129,7 @@ irqreturn_t timer_interrupt(int irq, voi
/* last time the cmos clock got updated */
static long last_rtc_update;

- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
do_timer(1);

/*
@@ -149,7 +149,7 @@ irqreturn_t timer_interrupt(int irq, voi
/* Do it again in 60s. */
last_rtc_update = xtime.tv_sec - 600;
}
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);

#ifdef CONFIG_IPIPE
update_root_process_times(get_irq_regs());
Index: linux-2.6-tip/arch/cris/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/cris/kernel/time.c
+++ linux-2.6-tip/arch/cris/kernel/time.c
@@ -87,7 +87,7 @@ int do_settimeofday(struct timespec *tv)
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;

- write_seqlock_irq(&xtime_lock);
+ write_raw_seqlock_irq(&xtime_lock);
/*
* This is revolting. We need to set "xtime" correctly. However, the
* value in this location is the value at the most recent update of
@@ -103,7 +103,7 @@ int do_settimeofday(struct timespec *tv)
set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);

ntp_clear();
- write_sequnlock_irq(&xtime_lock);
+ write_raw_sequnlock_irq(&xtime_lock);
clock_was_set();
return 0;
}
Index: linux-2.6-tip/arch/frv/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/frv/kernel/time.c
+++ linux-2.6-tip/arch/frv/kernel/time.c
@@ -70,7 +70,7 @@ static irqreturn_t timer_interrupt(int i
* the irq version of write_lock because as just said we have irq
* locally disabled. -arca
*/
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

do_timer(1);

@@ -96,7 +96,7 @@ static irqreturn_t timer_interrupt(int i
__set_LEDS(n);
#endif /* CONFIG_HEARTBEAT */

- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);

update_process_times(user_mode(get_irq_regs()));

Index: linux-2.6-tip/arch/h8300/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/h8300/kernel/time.c
+++ linux-2.6-tip/arch/h8300/kernel/time.c
@@ -35,9 +35,9 @@ void h8300_timer_tick(void)
{
if (current->pid)
profile_tick(CPU_PROFILING);
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
do_timer(1);
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
update_process_times(user_mode(get_irq_regs()));
}

Index: linux-2.6-tip/arch/ia64/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/ia64/kernel/time.c
+++ linux-2.6-tip/arch/ia64/kernel/time.c
@@ -197,10 +197,10 @@ timer_interrupt (int irq, void *dev_id)
* another CPU. We need to avoid to SMP race by acquiring the
* xtime_lock.
*/
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
do_timer(1);
local_cpu_data->itm_next = new_itm;
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
} else
local_cpu_data->itm_next = new_itm;

@@ -477,7 +477,7 @@ void update_vsyscall(struct timespec *wa
{
unsigned long flags;

- write_seqlock_irqsave(&fsyscall_gtod_data.lock, flags);
+ write_raw_seqlock_irqsave(&fsyscall_gtod_data.lock, flags);

/* copy fsyscall clock data */
fsyscall_gtod_data.clk_mask = c->mask;
@@ -500,6 +500,6 @@ void update_vsyscall(struct timespec *wa
fsyscall_gtod_data.monotonic_time.tv_sec++;
}

- write_sequnlock_irqrestore(&fsyscall_gtod_data.lock, flags);
+ write_raw_sequnlock_irqrestore(&fsyscall_gtod_data.lock, flags);
}

Index: linux-2.6-tip/arch/ia64/xen/time.c
===================================================================
--- linux-2.6-tip.orig/arch/ia64/xen/time.c
+++ linux-2.6-tip/arch/ia64/xen/time.c
@@ -140,10 +140,10 @@ consider_steal_time(unsigned long new_it
delta_itm += local_cpu_data->itm_delta * (stolen + blocked);

if (cpu == time_keeper_id) {
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
do_timer(stolen + blocked);
local_cpu_data->itm_next = delta_itm + new_itm;
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
} else {
local_cpu_data->itm_next = delta_itm + new_itm;
}
Index: linux-2.6-tip/arch/m32r/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/m32r/kernel/time.c
+++ linux-2.6-tip/arch/m32r/kernel/time.c
@@ -143,7 +143,7 @@ static irqreturn_t timer_interrupt(int i
* CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
* called as close as possible to 500 ms before the new second starts.
*/
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
if (ntp_synced()
&& xtime.tv_sec > last_rtc_update + 660
&& (xtime.tv_nsec / 1000) >= 500000 - ((unsigned)TICK_SIZE) / 2
@@ -154,7 +154,7 @@ static irqreturn_t timer_interrupt(int i
else /* do it again in 60 s */
last_rtc_update = xtime.tv_sec - 600;
}
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
/* As we return to user mode fire off the other CPU schedulers..
this is basically because we don't yet share IRQ's around.
This message is rigged to be safe on the 386 - basically it's
Index: linux-2.6-tip/arch/m68knommu/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/m68knommu/kernel/time.c
+++ linux-2.6-tip/arch/m68knommu/kernel/time.c
@@ -44,11 +44,11 @@ irqreturn_t arch_timer_interrupt(int irq
if (current->pid)
profile_tick(CPU_PROFILING);

- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

do_timer(1);

- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);

#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
Index: linux-2.6-tip/arch/mn10300/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/mn10300/kernel/time.c
+++ linux-2.6-tip/arch/mn10300/kernel/time.c
@@ -99,7 +99,7 @@ static irqreturn_t timer_interrupt(int i
{
unsigned tsc, elapse;

- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

while (tsc = get_cycles(),
elapse = mn10300_last_tsc - tsc, /* time elapsed since last
@@ -114,7 +114,7 @@ static irqreturn_t timer_interrupt(int i
check_rtc_time();
}

- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);

update_process_times(user_mode(get_irq_regs()));

Index: linux-2.6-tip/arch/parisc/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/parisc/kernel/time.c
+++ linux-2.6-tip/arch/parisc/kernel/time.c
@@ -163,9 +163,9 @@ irqreturn_t __irq_entry timer_interrupt(
}

if (cpu == 0) {
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
do_timer(ticks_elapsed);
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
}

return IRQ_HANDLED;
@@ -268,12 +268,12 @@ void __init time_init(void)
if (pdc_tod_read(&tod_data) == 0) {
unsigned long flags;

- write_seqlock_irqsave(&xtime_lock, flags);
+ write_raw_seqlock_irqsave(&xtime_lock, flags);
xtime.tv_sec = tod_data.tod_sec;
xtime.tv_nsec = tod_data.tod_usec * 1000;
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
- write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_raw_sequnlock_irqrestore(&xtime_lock, flags);
} else {
printk(KERN_ERR "Error reading tod clock\n");
xtime.tv_sec = 0;
Index: linux-2.6-tip/arch/powerpc/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/powerpc/kernel/time.c
+++ linux-2.6-tip/arch/powerpc/kernel/time.c
@@ -1049,7 +1049,7 @@ void __init time_init(void)
/* Save the current timebase to pretty up CONFIG_PRINTK_TIME */
boot_tb = get_tb_or_rtc();

- write_seqlock_irqsave(&xtime_lock, flags);
+ write_raw_seqlock_irqsave(&xtime_lock, flags);

/* If platform provided a timezone (pmac), we correct the time */
if (timezone_offset) {
@@ -1063,7 +1063,7 @@ void __init time_init(void)
vdso_data->stamp_xsec = (u64) xtime.tv_sec * XSEC_PER_SEC;
vdso_data->tb_to_xs = tb_to_xs;

- write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_raw_sequnlock_irqrestore(&xtime_lock, flags);

/* Start the decrementer on CPUs that have manual control
* such as BookE
Index: linux-2.6-tip/arch/sparc/kernel/pcic.c
===================================================================
--- linux-2.6-tip.orig/arch/sparc/kernel/pcic.c
+++ linux-2.6-tip/arch/sparc/kernel/pcic.c
@@ -702,10 +702,10 @@ static void pcic_clear_clock_irq(void)

static irqreturn_t pcic_timer_handler (int irq, void *h)
{
- write_seqlock(&xtime_lock); /* Dummy, to show that we remember */
+ write_raw_seqlock(&xtime_lock); /* Dummy, to show that we remember */
pcic_clear_clock_irq();
do_timer(1);
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
#endif
Index: linux-2.6-tip/arch/sparc/kernel/time_32.c
===================================================================
--- linux-2.6-tip.orig/arch/sparc/kernel/time_32.c
+++ linux-2.6-tip/arch/sparc/kernel/time_32.c
@@ -95,7 +95,7 @@ static irqreturn_t timer_interrupt(int d
#endif

/* Protect counter clear so that do_gettimeoffset works */
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

clear_clock_irq();

@@ -111,7 +111,7 @@ static irqreturn_t timer_interrupt(int d
else
last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
}
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);

#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
Index: linux-2.6-tip/arch/xtensa/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/arch/xtensa/kernel/time.c
+++ linux-2.6-tip/arch/xtensa/kernel/time.c
@@ -101,7 +101,7 @@ again:
update_process_times(user_mode(get_irq_regs()));
#endif

- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

do_timer(1); /* Linux handler in kernel/timer.c */

@@ -110,7 +110,7 @@ again:
next += CCOUNT_PER_JIFFY;
set_linux_timer(next);

- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
}

/* Allow platform to do something useful (Wdog). */
Index: linux-2.6-tip/include/linux/time.h
===================================================================
--- linux-2.6-tip.orig/include/linux/time.h
+++ linux-2.6-tip/include/linux/time.h
@@ -99,7 +99,7 @@ static inline struct timespec timespec_s

extern struct timespec xtime;
extern struct timespec wall_to_monotonic;
-extern seqlock_t xtime_lock;
+extern raw_seqlock_t xtime_lock;

extern void read_persistent_clock(struct timespec *ts);
extern void read_boot_clock(struct timespec *ts);
Index: linux-2.6-tip/kernel/hrtimer.c
===================================================================
--- linux-2.6-tip.orig/kernel/hrtimer.c
+++ linux-2.6-tip/kernel/hrtimer.c
@@ -88,10 +88,10 @@ static void hrtimer_get_softirq_time(str
unsigned long seq;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
xts = current_kernel_time();
tom = wall_to_monotonic;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

xtim = timespec_to_ktime(xts);
tomono = timespec_to_ktime(tom);
@@ -619,11 +619,11 @@ static void retrigger_next_event(void *a
return;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
set_normalized_timespec(&realtime_offset,
-wall_to_monotonic.tv_sec,
-wall_to_monotonic.tv_nsec);
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

base = &__get_cpu_var(hrtimer_bases);

Index: linux-2.6-tip/kernel/time.c
===================================================================
--- linux-2.6-tip.orig/kernel/time.c
+++ linux-2.6-tip/kernel/time.c
@@ -133,11 +133,11 @@ SYSCALL_DEFINE2(gettimeofday, struct tim
*/
static inline void warp_clock(void)
{
- write_seqlock_irq(&xtime_lock);
+ write_raw_seqlock_irq(&xtime_lock);
wall_to_monotonic.tv_sec -= sys_tz.tz_minuteswest * 60;
xtime.tv_sec += sys_tz.tz_minuteswest * 60;
update_xtime_cache(0);
- write_sequnlock_irq(&xtime_lock);
+ write_raw_sequnlock_irq(&xtime_lock);
clock_was_set();
}

@@ -699,9 +699,9 @@ u64 get_jiffies_64(void)
u64 ret;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
ret = jiffies_64;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));
return ret;
}
EXPORT_SYMBOL(get_jiffies_64);
Index: linux-2.6-tip/kernel/time/ntp.c
===================================================================
--- linux-2.6-tip.orig/kernel/time/ntp.c
+++ linux-2.6-tip/kernel/time/ntp.c
@@ -188,7 +188,7 @@ static enum hrtimer_restart ntp_leap_sec
{
enum hrtimer_restart res = HRTIMER_NORESTART;

- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

switch (time_state) {
case TIME_OK:
@@ -218,7 +218,7 @@ static enum hrtimer_restart ntp_leap_sec
break;
}

- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);

return res;
}
@@ -476,7 +476,7 @@ int do_adjtimex(struct timex *txc)

getnstimeofday(&ts);

- write_seqlock_irq(&xtime_lock);
+ write_raw_seqlock_irq(&xtime_lock);

if (txc->modes & ADJ_ADJTIME) {
long save_adjust = time_adjust;
@@ -524,7 +524,7 @@ int do_adjtimex(struct timex *txc)
txc->errcnt = 0;
txc->stbcnt = 0;

- write_sequnlock_irq(&xtime_lock);
+ write_raw_sequnlock_irq(&xtime_lock);

txc->time.tv_sec = ts.tv_sec;
txc->time.tv_usec = ts.tv_nsec;
Index: linux-2.6-tip/kernel/time/tick-common.c
===================================================================
--- linux-2.6-tip.orig/kernel/time/tick-common.c
+++ linux-2.6-tip/kernel/time/tick-common.c
@@ -60,13 +60,13 @@ int tick_is_oneshot_available(void)
static void tick_periodic(int cpu)
{
if (tick_do_timer_cpu == cpu) {
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

/* Keep track of the next tick event */
tick_next_period = ktime_add(tick_next_period, tick_period);

do_timer(1);
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
}

update_process_times(user_mode(get_irq_regs()));
@@ -127,9 +127,9 @@ void tick_setup_periodic(struct clock_ev
ktime_t next;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
next = tick_next_period;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

clockevents_set_mode(dev, CLOCK_EVT_MODE_ONESHOT);

Index: linux-2.6-tip/kernel/time/tick-sched.c
===================================================================
--- linux-2.6-tip.orig/kernel/time/tick-sched.c
+++ linux-2.6-tip/kernel/time/tick-sched.c
@@ -57,7 +57,7 @@ static void tick_do_update_jiffies64(kti
return;

/* Reevalute with xtime_lock held */
- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);

delta = ktime_sub(now, last_jiffies_update);
if (delta.tv64 >= tick_period.tv64) {
@@ -80,7 +80,7 @@ static void tick_do_update_jiffies64(kti
/* Keep the tick_next_period variable up to date */
tick_next_period = ktime_add(last_jiffies_update, tick_period);
}
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
}

/*
@@ -90,12 +90,12 @@ static ktime_t tick_init_jiffy_update(vo
{
ktime_t period;

- write_seqlock(&xtime_lock);
+ write_raw_seqlock(&xtime_lock);
/* Did we start the jiffies update yet ? */
if (last_jiffies_update.tv64 == 0)
last_jiffies_update = tick_next_period;
period = last_jiffies_update;
- write_sequnlock(&xtime_lock);
+ write_raw_sequnlock(&xtime_lock);
return period;
}

@@ -265,11 +265,11 @@ void tick_nohz_stop_sched_tick(int inidl
ts->idle_calls++;
/* Read jiffies and the time when jiffies were updated last */
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
last_update = last_jiffies_update;
last_jiffies = jiffies;
time_delta = timekeeping_max_deferment();
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

if (rcu_needs_cpu(cpu) || printk_needs_cpu(cpu) ||
arch_needs_cpu(cpu)) {
Index: linux-2.6-tip/kernel/time/timekeeping.c
===================================================================
--- linux-2.6-tip.orig/kernel/time/timekeeping.c
+++ linux-2.6-tip/kernel/time/timekeeping.c
@@ -135,8 +135,7 @@ static inline s64 timekeeping_get_ns_raw
* This read-write spinlock protects us from races in SMP while
* playing with xtime.
*/
-__cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock);
-
+__cacheline_aligned_in_smp DEFINE_RAW_SEQLOCK(xtime_lock);

/*
* The current time
@@ -226,7 +225,7 @@ void getnstimeofday(struct timespec *ts)
WARN_ON(timekeeping_suspended);

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);

*ts = xtime;
nsecs = timekeeping_get_ns();
@@ -234,7 +233,7 @@ void getnstimeofday(struct timespec *ts)
/* If arch requires, add in gettimeoffset() */
nsecs += arch_gettimeoffset();

- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

timespec_add_ns(ts, nsecs);
}
@@ -249,12 +248,12 @@ ktime_t ktime_get(void)
WARN_ON(timekeeping_suspended);

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
secs = xtime.tv_sec + wall_to_monotonic.tv_sec;
nsecs = xtime.tv_nsec + wall_to_monotonic.tv_nsec;
nsecs += timekeeping_get_ns();

- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));
/*
* Use ktime_set/ktime_add_ns to create a proper ktime on
* 32-bit architectures without CONFIG_KTIME_SCALAR.
@@ -280,12 +279,12 @@ void ktime_get_ts(struct timespec *ts)
WARN_ON(timekeeping_suspended);

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
*ts = xtime;
tomono = wall_to_monotonic;
nsecs = timekeeping_get_ns();

- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec,
ts->tv_nsec + tomono.tv_nsec + nsecs);
@@ -322,7 +321,7 @@ int do_settimeofday(struct timespec *tv)
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;

- write_seqlock_irqsave(&xtime_lock, flags);
+ write_raw_seqlock_irqsave(&xtime_lock, flags);

timekeeping_forward_now();

@@ -339,7 +338,7 @@ int do_settimeofday(struct timespec *tv)

update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);

- write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_raw_sequnlock_irqrestore(&xtime_lock, flags);

/* signal hrtimers about time change */
clock_was_set();
@@ -418,11 +417,11 @@ void ktime_get_ts(struct timespec *ts)
unsigned long seq;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
getnstimeofday(ts);
tomono = wall_to_monotonic;

- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec,
ts->tv_nsec + tomono.tv_nsec);
@@ -458,11 +457,11 @@ void getrawmonotonic(struct timespec *ts
s64 nsecs;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);
nsecs = timekeeping_get_ns_raw();
*ts = raw_time;

- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

timespec_add_ns(ts, nsecs);
}
@@ -478,11 +477,11 @@ int timekeeping_valid_for_hres(void)
int ret;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);

ret = timekeeper.clock->flags & CLOCK_SOURCE_VALID_FOR_HRES;

- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

return ret;
}
@@ -540,7 +539,7 @@ void __init timekeeping_init(void)
read_persistent_clock(&now);
read_boot_clock(&boot);

- write_seqlock_irqsave(&xtime_lock, flags);
+ write_raw_seqlock_irqsave(&xtime_lock, flags);

ntp_init();

@@ -562,7 +561,7 @@ void __init timekeeping_init(void)
update_xtime_cache(0);
total_sleep_time.tv_sec = 0;
total_sleep_time.tv_nsec = 0;
- write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_raw_sequnlock_irqrestore(&xtime_lock, flags);
}

/* time in seconds when suspend began */
@@ -585,7 +584,7 @@ static int timekeeping_resume(struct sys

clocksource_resume();

- write_seqlock_irqsave(&xtime_lock, flags);
+ write_raw_seqlock_irqsave(&xtime_lock, flags);

if (timespec_compare(&ts, &timekeeping_suspend_time) > 0) {
ts = timespec_sub(ts, timekeeping_suspend_time);
@@ -598,7 +597,7 @@ static int timekeeping_resume(struct sys
timekeeper.clock->cycle_last = timekeeper.clock->read(timekeeper.clock);
timekeeper.ntp_error = 0;
timekeeping_suspended = 0;
- write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_raw_sequnlock_irqrestore(&xtime_lock, flags);

touch_softlockup_watchdog();

@@ -616,10 +615,10 @@ static int timekeeping_suspend(struct sy

read_persistent_clock(&timekeeping_suspend_time);

- write_seqlock_irqsave(&xtime_lock, flags);
+ write_raw_seqlock_irqsave(&xtime_lock, flags);
timekeeping_forward_now();
timekeeping_suspended = 1;
- write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_raw_sequnlock_irqrestore(&xtime_lock, flags);

clockevents_notify(CLOCK_EVT_NOTIFY_SUSPEND, NULL);

@@ -909,10 +908,10 @@ struct timespec current_kernel_time(void
unsigned long seq;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);

now = xtime_cache;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

return now;
}
@@ -924,11 +923,11 @@ struct timespec get_monotonic_coarse(voi
unsigned long seq;

do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_raw_seqbegin(&xtime_lock);

now = xtime_cache;
mono = wall_to_monotonic;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_raw_seqretry(&xtime_lock, seq));

set_normalized_timespec(&now, now.tv_sec + mono.tv_sec,
now.tv_nsec + mono.tv_nsec);


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