system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-11-05 18:23:50 +00:00
Code Issues Projects Releases Packages Wiki Activity

[PATCH] remove timer debug field

Browse source 
Remove timer_list.magic and associated debugging code.

I originally added this when a spinlock was added to timer_list - this meant
that an all-zeroes timer became illegal and init_timer() was required.

That spinlock isn't even there any more, although timer.base must now be
initialised.

I'll keep this debugging code in -mm.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton 2005-10-30 15:02:03 -08:00 committed by Linus Torvalds
parent 89ada67917
commit dfc4f94d2f
3 changed files with 2 additions and 56 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
arch/s390/kernel/vtime.c
View file

@ -24,7 +24,6 @@
#include <asm/s390_ext.h>
#include <asm/timer.h>
#define VTIMER_MAGIC (TIMER_MAGIC + 1)
static ext_int_info_t ext_int_info_timer;
DEFINE_PER_CPU(struct vtimer_queue, virt_cpu_timer);
@ -277,20 +276,12 @@ static void do_cpu_timer_interrupt(struct pt_regs *regs, __u16 error_code)
void init_virt_timer(struct vtimer_list *timer)
{
timer->magic = VTIMER_MAGIC;
timer->function = NULL;
INIT_LIST_HEAD(&timer->entry);
spin_lock_init(&timer->lock);
}
EXPORT_SYMBOL(init_virt_timer);
static inline int check_vtimer(struct vtimer_list *timer)
{
if (timer->magic != VTIMER_MAGIC)
return -EINVAL;
return 0;
}
static inline int vtimer_pending(struct vtimer_list *timer)
{
return (!list_empty(&timer->entry));
@ -346,7 +337,7 @@ static void internal_add_vtimer(struct vtimer_list *timer)
static inline int prepare_vtimer(struct vtimer_list *timer)
{
if (check_vtimer(timer) || !timer->function) {
if (!timer->function) {
printk("add_virt_timer: uninitialized timer\n");
return -EINVAL;
}
@ -414,7 +405,7 @@ int mod_virt_timer(struct vtimer_list *timer, __u64 expires)
unsigned long flags;
int cpu;
if (check_vtimer(timer) || !timer->function) {
if (!timer->function) {
printk("mod_virt_timer: uninitialized timer\n");
return -EINVAL;
}
@ -481,11 +472,6 @@ int del_virt_timer(struct vtimer_list *timer)
unsigned long flags;
struct vtimer_queue *vt_list;
if (check_vtimer(timer)) {
printk("del_virt_timer: timer not initialized\n");
return -EINVAL;
}
/* check if timer is pending */
if (!vtimer_pending(timer))
return 0;

5
include/linux/timer.h
View file

@ -12,16 +12,12 @@ struct timer_list {
struct list_head entry;
unsigned long expires;
unsigned long magic;
void (*function)(unsigned long);
unsigned long data;
struct timer_base_s *base;
};
#define TIMER_MAGIC 0x4b87ad6e
extern struct timer_base_s __init_timer_base;
#define TIMER_INITIALIZER(_function, _expires, _data) { \
@ -29,7 +25,6 @@ extern struct timer_base_s __init_timer_base;
.expires = (_expires), \
.data = (_data), \
.base = &__init_timer_base, \
.magic = TIMER_MAGIC, \
}
#define DEFINE_TIMER(_name, _function, _expires, _data) \

35
kernel/timer.c
View file

@ -91,30 +91,6 @@ static inline void set_running_timer(tvec_base_t *base,
#endif
}
static void check_timer_failed(struct timer_list *timer)
{
static int whine_count;
if (whine_count < 16) {
whine_count++;
printk("Uninitialised timer!\n");
printk("This is just a warning. Your computer is OK\n");
printk("function=0x%p, data=0x%lx\n",
timer->function, timer->data);
dump_stack();
}
/*
* Now fix it up
*/
timer->magic = TIMER_MAGIC;
}
static inline void check_timer(struct timer_list *timer)
{
if (timer->magic != TIMER_MAGIC)
check_timer_failed(timer);
}
static void internal_add_timer(tvec_base_t *base, struct timer_list *timer)
{
unsigned long expires = timer->expires;
@ -177,7 +153,6 @@ void fastcall init_timer(struct timer_list *timer)
{
timer->entry.next = NULL;
timer->base = &per_cpu(tvec_bases, raw_smp_processor_id()).t_base;
timer->magic = TIMER_MAGIC;
}
EXPORT_SYMBOL(init_timer);
@ -230,7 +205,6 @@ int __mod_timer(struct timer_list *timer, unsigned long expires)
int ret = 0;
BUG_ON(!timer->function);
check_timer(timer);
base = lock_timer_base(timer, &flags);
@ -283,9 +257,6 @@ void add_timer_on(struct timer_list *timer, int cpu)
unsigned long flags;
BUG_ON(timer_pending(timer) || !timer->function);
check_timer(timer);
spin_lock_irqsave(&base->t_base.lock, flags);
timer->base = &base->t_base;
internal_add_timer(base, timer);
@ -316,8 +287,6 @@ int mod_timer(struct timer_list *timer, unsigned long expires)
{
BUG_ON(!timer->function);
check_timer(timer);
/*
* This is a common optimization triggered by the
* networking code - if the timer is re-modified
@ -348,8 +317,6 @@ int del_timer(struct timer_list *timer)
unsigned long flags;
int ret = 0;
check_timer(timer);
if (timer_pending(timer)) {
base = lock_timer_base(timer, &flags);
if (timer_pending(timer)) {
@ -412,8 +379,6 @@ int try_to_del_timer_sync(struct timer_list *timer)
*/
int del_timer_sync(struct timer_list *timer)
{
check_timer(timer);
for (;;) {
int ret = try_to_del_timer_sync(timer);
if (ret >= 0)