From 674a396c6d2ba0341ebdd7c1c9950f32f018e2dd Mon Sep 17 00:00:00 2001 From: Evgeniy Polyakov Date: Mon, 20 Feb 2006 11:15:37 +0300 Subject: [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 work. Signed-off-by: Evgeniy Polyakov Signed-off-by: Greg Kroah-Hartman --- drivers/w1/w1_int.c | 34 +++++++++++----------------------- 1 file changed, 11 insertions(+), 23 deletions(-) (limited to 'drivers/w1/w1_int.c') diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c index a2f9065e1928..68565aacec7b 100644 --- a/drivers/w1/w1_int.c +++ b/drivers/w1/w1_int.c @@ -22,6 +22,7 @@ #include #include #include +#include #include "w1.h" #include "w1_log.h" @@ -56,7 +57,6 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, dev->max_slave_count = slave_count; dev->slave_count = 0; dev->attempts = 0; - dev->kpid = -1; dev->initialized = 0; dev->id = id; dev->slave_ttl = slave_ttl; @@ -67,8 +67,6 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, INIT_LIST_HEAD(&dev->slist); init_MUTEX(&dev->mutex); - init_completion(&dev->dev_exited); - memcpy(&dev->dev, device, sizeof(struct device)); snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id), "w1_bus_master%u", dev->id); @@ -116,12 +114,12 @@ int w1_add_master_device(struct w1_bus_master *master) if (!dev) return -ENOMEM; - dev->kpid = kernel_thread(&w1_process, dev, 0); - if (dev->kpid < 0) { + dev->thread = kthread_run(&w1_process, dev, "%s", dev->name); + if (IS_ERR(dev->thread)) { + retval = PTR_ERR(dev->thread); dev_err(&dev->dev, "Failed to create new kernel thread. err=%d\n", - dev->kpid); - retval = dev->kpid; + retval); goto err_out_free_dev; } @@ -138,20 +136,14 @@ int w1_add_master_device(struct w1_bus_master *master) spin_unlock(&w1_mlock); msg.id.mst.id = dev->id; - msg.id.mst.pid = dev->kpid; + msg.id.mst.pid = dev->thread->pid; msg.type = W1_MASTER_ADD; w1_netlink_send(dev, &msg); return 0; err_out_kill_thread: - set_bit(W1_MASTER_NEED_EXIT, &dev->flags); - if (kill_proc(dev->kpid, SIGTERM, 1)) - dev_err(&dev->dev, - "Failed to send signal to w1 kernel thread %d.\n", - dev->kpid); - wait_for_completion(&dev->dev_exited); - + kthread_stop(dev->thread); err_out_free_dev: w1_free_dev(dev); @@ -160,18 +152,14 @@ err_out_free_dev: void __w1_remove_master_device(struct w1_master *dev) { - int err; struct w1_netlink_msg msg; + pid_t pid = dev->thread->pid; set_bit(W1_MASTER_NEED_EXIT, &dev->flags); - err = kill_proc(dev->kpid, SIGTERM, 1); - if (err) - dev_err(&dev->dev, - "%s: Failed to send signal to w1 kernel thread %d.\n", - __func__, dev->kpid); + kthread_stop(dev->thread); while (atomic_read(&dev->refcnt)) { - dev_dbg(&dev->dev, "Waiting for %s to become free: refcnt=%d.\n", + dev_info(&dev->dev, "Waiting for %s to become free: refcnt=%d.\n", dev->name, atomic_read(&dev->refcnt)); if (msleep_interruptible(1000)) @@ -179,7 +167,7 @@ void __w1_remove_master_device(struct w1_master *dev) } msg.id.mst.id = dev->id; - msg.id.mst.pid = dev->kpid; + msg.id.mst.pid = pid; msg.type = W1_MASTER_REMOVE; w1_netlink_send(dev, &msg); -- cgit v1.2.3