diff options
| -rw-r--r-- | Documentation/pci.txt | 4 | ||||
| -rw-r--r-- | drivers/base/dd.c | 41 | ||||
| -rw-r--r-- | drivers/pci/Kconfig | 25 | ||||
| -rw-r--r-- | drivers/pci/pci-driver.c | 15 | ||||
| -rw-r--r-- | include/linux/device.h | 1 |
5 files changed, 3 insertions, 83 deletions
diff --git a/Documentation/pci.txt b/Documentation/pci.txt index a8ded1a8bd6..40c4717d236 100644 --- a/Documentation/pci.txt +++ b/Documentation/pci.txt @@ -124,10 +124,6 @@ initialization with a pointer to a structure describing the driver err_handler See Documentation/pci-error-recovery.txt - multithread_probe Enable multi-threaded probe/scan. Driver must - provide its own locking/syncronization for init - operations if this is enabled. - The ID table is an array of struct pci_device_id entries ending with an all-zero entry. Each entry consists of: diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 18dba8e78da..92428e55b0c 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -226,12 +226,10 @@ static int device_probe_drivers(void *data) * * Walk the list of drivers that the bus has and call * driver_probe_device() for each pair. If a compatible - * pair is found, break out and return. If the bus specifies - * multithreaded probing, walking the list of drivers is done - * on a probing thread. + * pair is found, break out and return. * * Returns 1 if the device was bound to a driver; - * 0 if no matching device was found or multithreaded probing is done; + * 0 if no matching device was found; * -ENODEV if the device is not registered. * * When called for a USB interface, @dev->parent->sem must be held. @@ -239,7 +237,6 @@ static int device_probe_drivers(void *data) int device_attach(struct device * dev) { int ret = 0; - struct task_struct *probe_task = ERR_PTR(-ENOMEM); down(&dev->sem); if (dev->driver) { @@ -251,12 +248,7 @@ int device_attach(struct device * dev) ret = 0; } } else { - if (dev->bus->multithread_probe) - probe_task = kthread_run(device_probe_drivers, dev, - "probe-%s", dev->bus_id); - if(IS_ERR(probe_task)) - ret = bus_for_each_drv(dev->bus, NULL, dev, - __device_attach); + ret = bus_for_each_drv(dev->bus, NULL, dev, __device_attach); } up(&dev->sem); return ret; @@ -383,33 +375,6 @@ void driver_detach(struct device_driver * drv) } } -#ifdef CONFIG_PCI_MULTITHREAD_PROBE -static int __init wait_for_probes(void) -{ - DEFINE_WAIT(wait); - - printk(KERN_INFO "%s: waiting for %d threads\n", __FUNCTION__, - atomic_read(&probe_count)); - if (!atomic_read(&probe_count)) - return 0; - while (atomic_read(&probe_count)) { - prepare_to_wait(&probe_waitqueue, &wait, TASK_UNINTERRUPTIBLE); - if (atomic_read(&probe_count)) - schedule(); - } - finish_wait(&probe_waitqueue, &wait); - return 0; -} - -core_initcall_sync(wait_for_probes); -postcore_initcall_sync(wait_for_probes); -arch_initcall_sync(wait_for_probes); -subsys_initcall_sync(wait_for_probes); -fs_initcall_sync(wait_for_probes); -device_initcall_sync(wait_for_probes); -late_initcall_sync(wait_for_probes); -#endif - EXPORT_SYMBOL_GPL(device_bind_driver); EXPORT_SYMBOL_GPL(device_release_driver); EXPORT_SYMBOL_GPL(device_attach); diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index 70efe8f285a..7a1d6d51283 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -21,31 +21,6 @@ config PCI_MSI If you don't know what to do here, say N. -config PCI_MULTITHREAD_PROBE - bool "PCI Multi-threaded probe (EXPERIMENTAL)" - depends on PCI && EXPERIMENTAL && BROKEN - help - Say Y here if you want the PCI core to spawn a new thread for - every PCI device that is probed. This can cause a huge - speedup in boot times on multiprocessor machines, and even a - smaller speedup on single processor machines. - - But it can also cause lots of bad things to happen. A number - of PCI drivers cannot properly handle running in this way, - some will just not work properly at all, while others might - decide to blow up power supplies with a huge load all at once, - so use this option at your own risk. - - It is very unwise to use this option if you are not using a - boot process that can handle devices being created in any - order. A program that can create persistent block and network - device names (like udev) is a good idea if you wish to use - this option. - - Again, use this option at your own risk, you have been warned! - - When in doubt, say N. - config PCI_DEBUG bool "PCI Debugging" depends on PCI && DEBUG_KERNEL diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 07fdb3cd617..3bb7739d26a 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -14,20 +14,6 @@ #include "pci.h" /* - * Registration of PCI drivers and handling of hot-pluggable devices. - */ - -/* multithreaded probe logic */ -static int pci_multithread_probe = -#ifdef CONFIG_PCI_MULTITHREAD_PROBE - 1; -#else - 0; -#endif -__module_param_call("", pci_multithread_probe, param_set_bool, param_get_bool, &pci_multithread_probe, 0644); - - -/* * Dynamic device IDs are disabled for !CONFIG_HOTPLUG */ @@ -569,7 +555,6 @@ struct bus_type pci_bus_type = { static int __init pci_driver_init(void) { - pci_bus_type.multithread_probe = pci_multithread_probe; return bus_register(&pci_bus_type); } diff --git a/include/linux/device.h b/include/linux/device.h index a0cd2ced31a..ff83b61d283 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -80,7 +80,6 @@ struct bus_type { int (*resume)(struct device * dev); unsigned int drivers_autoprobe:1; - unsigned int multithread_probe:1; }; extern int __must_check bus_register(struct bus_type * bus); |