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[VOYAGER] Convert the monitor thread to use the kthread API 

full kthread conversion on the voyager power switch handling thread.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Christoph Hellwig 2007-04-22 20:30:43 +01:00 committed by James Bottomley
parent 9f483519be
commit f3402a4e52
3 changed files with 24 additions and 55 deletions
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4
arch/i386/mach-voyager/voyager_cat.c
View File

@ -1111,7 +1111,7 @@ voyager_cat_do_common_interrupt(void)
printk(KERN_ERR "Voyager front panel switch turned off\n");
voyager_status.switch_off = 1;
voyager_status.request_from_kernel = 1;
up(&kvoyagerd_sem);
wake_up_process(voyager_thread);
}
/* Tell the hardware we're taking care of the
* shutdown, otherwise it will power the box off
@ -1157,7 +1157,7 @@ voyager_cat_do_common_interrupt(void)
outb(VOYAGER_CAT_END, CAT_CMD);
voyager_status.power_fail = 1;
voyager_status.request_from_kernel = 1;
up(&kvoyagerd_sem);
wake_up_process(voyager_thread);
}

69
arch/i386/mach-voyager/voyager_thread.c
View File

@ -24,33 +24,16 @@
#include <linux/kmod.h>
#include <linux/completion.h>
#include <linux/sched.h>
#include <linux/kthread.h>
#include <asm/desc.h>
#include <asm/voyager.h>
#include <asm/vic.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
#define THREAD_NAME "kvoyagerd"
/* external variables */
int kvoyagerd_running = 0;
DECLARE_MUTEX_LOCKED(kvoyagerd_sem);
static int thread(void *);
static __u8 set_timeout = 0;
/* Start the machine monitor thread. Return 1 if OK, 0 if fail */
static int __init
voyager_thread_start(void)
{
if(kernel_thread(thread, NULL, CLONE_KERNEL) < 0) {
/* This is serious, but not fatal */
printk(KERN_ERR "Voyager: Failed to create system monitor thread!!!\n");
return 1;
}
return 0;
}
struct task_struct *voyager_thread;
static __u8 set_timeout;
static int
execute(const char *string)
@ -110,31 +93,15 @@ check_continuing_condition(void)
}
}
static void
wakeup(unsigned long unused)
{
up(&kvoyagerd_sem);
}
static int
thread(void *unused)
{
struct timer_list wakeup_timer;
kvoyagerd_running = 1;
daemonize(THREAD_NAME);
set_timeout = 0;
init_timer(&wakeup_timer);
sigfillset(&current->blocked);
printk(KERN_NOTICE "Voyager starting monitor thread\n");
for(;;) {
down_interruptible(&kvoyagerd_sem);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(set_timeout ? HZ : MAX_SCHEDULE_TIMEOUT);
VDEBUG(("Voyager Daemon awoken\n"));
if(voyager_status.request_from_kernel == 0) {
/* probably awoken from timeout */
@ -143,20 +110,26 @@ thread(void *unused)
check_from_kernel();
voyager_status.request_from_kernel = 0;
}
if(set_timeout) {
del_timer(&wakeup_timer);
wakeup_timer.expires = HZ + jiffies;
wakeup_timer.function = wakeup;
add_timer(&wakeup_timer);
}
}
}
static int __init
voyager_thread_start(void)
{
voyager_thread = kthread_run(thread, NULL, "kvoyagerd");
if (IS_ERR(voyager_thread)) {
printk(KERN_ERR "Voyager: Failed to create system monitor thread.\n");
return PTR_ERR(voyager_thread);
}
return 0;
}
static void __exit
voyager_thread_stop(void)
{
/* FIXME: do nothing at the moment */
kthread_stop(voyager_thread);
}
module_init(voyager_thread_start);
//module_exit(voyager_thread_stop);
module_exit(voyager_thread_stop);

6
include/asm-i386/voyager.h
View File

@ -487,15 +487,11 @@ extern struct voyager_qic_cpi *voyager_quad_cpi_addr[NR_CPUS];
extern struct voyager_SUS *voyager_SUS;
/* variables exported always */
extern struct task_struct *voyager_thread;
extern int voyager_level;
extern int kvoyagerd_running;
extern struct semaphore kvoyagerd_sem;
extern struct voyager_status voyager_status;
/* functions exported by the voyager and voyager_smp modules */
extern int voyager_cat_readb(__u8 module, __u8 asic, int reg);
extern void voyager_cat_init(void);
extern void voyager_detect(struct voyager_bios_info *);