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[PATCH] Consolidate default sched_clock()

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Use attribute(weak).

Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2007-02-10 01:45:10 -08:00 committed by Linus Torvalds
parent 5e07e1ccb0
commit b035b6de24
17 changed files with 10 additions and 137 deletions
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11
arch/alpha/kernel/time.c
View File

@ -90,17 +90,6 @@ static inline __u32 rpcc(void)
return result;
}
/*
* Scheduler clock - returns current time in nanosec units.
*
* Copied from ARM code for expediency... ;-}
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
/*
* timer_interrupt() needs to keep up the real-time clock,
* as well as call the "do_timer()" routine every clocktick

10
arch/arm/kernel/time.c
View File

@ -77,16 +77,6 @@ static unsigned long dummy_gettimeoffset(void)
}
#endif
/*
* Scheduler clock - returns current time in nanosec units.
* This is the default implementation. Sub-architecture
* implementations can override this.
*/
unsigned long long __attribute__((weak)) sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
/*
* An implementation of printk_clock() independent from
* sched_clock(). This avoids non-bootable kernels when

8
arch/arm26/kernel/time.c
View File

@ -89,14 +89,6 @@ static unsigned long gettimeoffset(void)
return (offset + LATCH/2) / LATCH;
}
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
static unsigned long next_rtc_update;
/*

9
arch/avr32/kernel/time.c
View File

@ -109,15 +109,6 @@ static void avr32_hpt_init(unsigned int count)
sysreg_write(COUNT, count);
}
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
{
/* There must be better ways...? */
return (unsigned long long)jiffies * (1000000000 / HZ);
}
/*
* local_timer_interrupt() does profiling and process accounting on a
* per-CPU basis.

8
arch/cris/kernel/time.c
View File

@ -216,14 +216,6 @@ cris_do_profile(struct pt_regs* regs)
#endif
}
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
static int
__init init_udelay(void)
{

6
arch/h8300/kernel/time.c
View File

@ -118,9 +118,3 @@ int do_settimeofday(struct timespec *tv)
}
EXPORT_SYMBOL(do_settimeofday);
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}

8
arch/m32r/kernel/time.c
View File

@ -286,11 +286,3 @@ void __init time_init(void)
#error no chip configuration
#endif
}
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}

9
arch/m68k/kernel/time.c
View File

@ -159,12 +159,3 @@ int do_settimeofday(struct timespec *tv)
}
EXPORT_SYMBOL(do_settimeofday);
/*
* Scheduler clock - returns current time in ns units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies*(1000000000/HZ);
}

9
arch/m68knommu/kernel/time.c
View File

@ -174,13 +174,4 @@ int do_settimeofday(struct timespec *tv)
clock_was_set();
return 0;
}
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
EXPORT_SYMBOL(do_settimeofday);

5
arch/mips/kernel/time.c
View File

@ -455,8 +455,3 @@ EXPORT_SYMBOL(rtc_lock);
EXPORT_SYMBOL(to_tm);
EXPORT_SYMBOL(rtc_mips_set_time);
EXPORT_SYMBOL(rtc_mips_get_time);
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies*(1000000000/HZ);
}

11
arch/parisc/kernel/time.c
View File

@ -288,17 +288,6 @@ do_settimeofday (struct timespec *tv)
}
EXPORT_SYMBOL(do_settimeofday);
/*
* XXX: We can do better than this.
* Returns nanoseconds
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
void __init start_cpu_itimer(void)
{
unsigned int cpu = smp_processor_id();

8
arch/sh/kernel/time.c
View File

@ -41,14 +41,6 @@ static int null_rtc_set_time(const time_t secs)
void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long __attribute__ ((weak)) sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
#ifndef CONFIG_GENERIC_TIME
void do_gettimeofday(struct timeval *tv)
{

9
arch/sh64/kernel/time.c
View File

@ -579,12 +579,3 @@ void enter_deep_standby(void)
asm __volatile__ ("nop");
panic("Unexpected wakeup!\n");
}
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}

9
arch/sparc/kernel/time.c
View File

@ -436,15 +436,6 @@ static inline unsigned long do_gettimeoffset(void)
return (*master_l10_counter >> 10) & 0x1fffff;
}
/*
* Returns nanoseconds
* XXX This is a suboptimal implementation.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
/* Ok, my cute asm atomicity trick doesn't work anymore.
* There are just too many variables that need to be protected
* now (both members of xtime, et al.)

8
arch/v850/kernel/time.c
View File

@ -27,14 +27,6 @@
#define TICK_SIZE (tick_nsec / 1000)
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
/*
* timer_interrupt() needs to keep up the real-time clock,
* as well as call the "do_timer()" routine every clocktick

9
arch/xtensa/kernel/time.c
View File

@ -38,15 +38,6 @@ unsigned long ccount_nsec; /* nsec per ccount increment */
unsigned int last_ccount_stamp;
static long last_rtc_update = 0;
/*
* Scheduler clock - returns current tim in nanosec units.
*/
unsigned long long sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
static irqreturn_t timer_interrupt(int irq, void *dev_id);
static struct irqaction timer_irqaction = {
.handler = timer_interrupt,

10
kernel/sched.c
View File

@ -56,6 +56,16 @@
#include <asm/unistd.h>
/*
* Scheduler clock - returns current time in nanosec units.
* This is default implementation.
* Architectures and sub-architectures can override this.
*/
unsigned long long __attribute__((weak)) sched_clock(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
}
/*
* Convert user-nice values [ -20 ... 0 ... 19 ]
* to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],