[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>

diff --git a/arch/i386/mach-voyager/voyager_cat.c b/arch/i386/mach-voyager/voyager_cat.c
index 943a947..26a2d4c 100644 (file)
--- a/arch/i386/mach-voyager/voyager_cat.c
+++ b/arch/i386/mach-voyager/voyager_cat.c
@@ -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);
                }
                
                

diff --git a/arch/i386/mach-voyager/voyager_thread.c b/arch/i386/mach-voyager/voyager_thread.c
index f398873..fdc1d92 100644 (file)
--- a/arch/i386/mach-voyager/voyager_thread.c
+++ b/arch/i386/mach-voyager/voyager_thread.c
@@ -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);

diff --git a/include/asm-i386/voyager.h b/include/asm-i386/voyager.h
index 5b27838..91a9932 100644 (file)
--- a/include/asm-i386/voyager.h
+++ b/include/asm-i386/voyager.h
@@ -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 *);