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author | Evgeniy Polyakov <johnpol@2ka.mipt.ru> | 2006-02-20 11:15:37 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-03-23 17:28:13 -0800 |
commit | 674a396c6d2ba0341ebdd7c1c9950f32f018e2dd (patch) | |
tree | b1263e0a926d9cbdc7aa58260099392ad49a72fe /drivers/w1/w1.c | |
parent | f73b5e7949945486a649e40821cd351e2f60bf02 (diff) | |
download | kernel_samsung_smdk4412-674a396c6d2ba0341ebdd7c1c9950f32f018e2dd.zip kernel_samsung_smdk4412-674a396c6d2ba0341ebdd7c1c9950f32f018e2dd.tar.gz kernel_samsung_smdk4412-674a396c6d2ba0341ebdd7c1c9950f32f018e2dd.tar.bz2 |
[PATCH] w1: use kthread api.
This patch removes old-style kernel thread initialization
and changes w1 to use kthread api.
It is based on Christoph Hellwig <hch@lst.de> work.
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/w1/w1.c')
-rw-r--r-- | drivers/w1/w1.c | 56 |
1 files changed, 16 insertions, 40 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index d640c1e..a698b51 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -30,6 +30,7 @@ #include <linux/device.h> #include <linux/slab.h> #include <linux/sched.h> +#include <linux/kthread.h> #include <asm/atomic.h> @@ -57,9 +58,7 @@ module_param_named(slave_ttl, w1_max_slave_ttl, int, 0); DEFINE_SPINLOCK(w1_mlock); LIST_HEAD(w1_masters); -static pid_t control_thread; -static int control_needs_exit; -static DECLARE_COMPLETION(w1_control_complete); +static struct task_struct *w1_control_thread; static int w1_master_match(struct device *dev, struct device_driver *drv) { @@ -717,22 +716,16 @@ static int w1_control(void *data) { struct w1_slave *sl, *sln; struct w1_master *dev, *n; - int err, have_to_wait = 0; + int have_to_wait = 0; - daemonize("w1_control"); - allow_signal(SIGTERM); - - while (!control_needs_exit || have_to_wait) { + while (!kthread_should_stop() || have_to_wait) { have_to_wait = 0; try_to_freeze(); msleep_interruptible(w1_control_timeout * 1000); - if (signal_pending(current)) - flush_signals(current); - list_for_each_entry_safe(dev, n, &w1_masters, w1_master_entry) { - if (!control_needs_exit && !dev->flags) + if (!kthread_should_stop() && !dev->flags) continue; /* * Little race: we can create thread but not set the flag. @@ -743,21 +736,12 @@ static int w1_control(void *data) continue; } - if (control_needs_exit) { + if (kthread_should_stop() || test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { set_bit(W1_MASTER_NEED_EXIT, &dev->flags); - err = kill_proc(dev->kpid, SIGTERM, 1); - if (err) - dev_err(&dev->dev, - "Failed to send signal to w1 kernel thread %d.\n", - dev->kpid); - } - - if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { - wait_for_completion(&dev->dev_exited); - spin_lock_bh(&w1_mlock); + spin_lock(&w1_mlock); list_del(&dev->w1_master_entry); - spin_unlock_bh(&w1_mlock); + spin_unlock(&w1_mlock); down(&dev->mutex); list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { @@ -789,7 +773,7 @@ static int w1_control(void *data) } } - complete_and_exit(&w1_control_complete, 0); + return 0; } int w1_process(void *data) @@ -797,17 +781,11 @@ int w1_process(void *data) struct w1_master *dev = (struct w1_master *) data; struct w1_slave *sl, *sln; - daemonize("%s", dev->name); - allow_signal(SIGTERM); - - while (!test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { + while (!kthread_should_stop() && !test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { try_to_freeze(); msleep_interruptible(w1_timeout * 1000); - if (signal_pending(current)) - flush_signals(current); - - if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) + if (kthread_should_stop() || test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) break; if (!dev->initialized) @@ -840,7 +818,6 @@ int w1_process(void *data) } atomic_dec(&dev->refcnt); - complete_and_exit(&dev->dev_exited, 0); return 0; } @@ -873,11 +850,11 @@ static int w1_init(void) goto err_out_master_unregister; } - control_thread = kernel_thread(&w1_control, NULL, 0); - if (control_thread < 0) { + w1_control_thread = kthread_run(w1_control, NULL, "w1_control"); + if (IS_ERR(w1_control_thread)) { + retval = PTR_ERR(w1_control_thread); printk(KERN_ERR "Failed to create control thread. err=%d\n", - control_thread); - retval = control_thread; + retval); goto err_out_slave_unregister; } @@ -903,8 +880,7 @@ static void w1_fini(void) list_for_each_entry(dev, &w1_masters, w1_master_entry) __w1_remove_master_device(dev); - control_needs_exit = 1; - wait_for_completion(&w1_control_complete); + kthread_stop(w1_control_thread); driver_unregister(&w1_slave_driver); driver_unregister(&w1_master_driver); |