diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/chip.c | 28 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 86 | ||||
| -rw-r--r-- | kernel/module.c | 76 | ||||
| -rw-r--r-- | kernel/params.c | 28 | ||||
| -rw-r--r-- | kernel/power/Kconfig | 26 | ||||
| -rw-r--r-- | kernel/resource.c | 62 |
6 files changed, 281 insertions, 25 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index d27b2585574..475e8a71bcd 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -39,6 +39,7 @@ void dynamic_irq_init(unsigned int irq) desc->chip = &no_irq_chip; desc->handle_irq = handle_bad_irq; desc->depth = 1; + desc->msi_desc = NULL; desc->handler_data = NULL; desc->chip_data = NULL; desc->action = NULL; @@ -74,6 +75,9 @@ void dynamic_irq_cleanup(unsigned int irq) WARN_ON(1); return; } + desc->msi_desc = NULL; + desc->handler_data = NULL; + desc->chip_data = NULL; desc->handle_irq = handle_bad_irq; desc->chip = &no_irq_chip; spin_unlock_irqrestore(&desc->lock, flags); @@ -162,6 +166,30 @@ int set_irq_data(unsigned int irq, void *data) EXPORT_SYMBOL(set_irq_data); /** + * set_irq_data - set irq type data for an irq + * @irq: Interrupt number + * @data: Pointer to interrupt specific data + * + * Set the hardware irq controller data for an irq + */ +int set_irq_msi(unsigned int irq, struct msi_desc *entry) +{ + struct irq_desc *desc; + unsigned long flags; + + if (irq >= NR_IRQS) { + printk(KERN_ERR + "Trying to install msi data for IRQ%d\n", irq); + return -EINVAL; + } + desc = irq_desc + irq; + spin_lock_irqsave(&desc->lock, flags); + desc->msi_desc = entry; + spin_unlock_irqrestore(&desc->lock, flags); + return 0; +} + +/** * set_irq_chip_data - set irq chip data for an irq * @irq: Interrupt number * @data: Pointer to chip specific data diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 8b961adc3bd..c4b7ed1cebf 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -482,3 +482,89 @@ int request_irq(unsigned int irq, irq_handler_t handler, return retval; } EXPORT_SYMBOL(request_irq); + +/* + * Device resource management aware IRQ request/free implementation. + */ +struct irq_devres { + unsigned int irq; + void *dev_id; +}; + +static void devm_irq_release(struct device *dev, void *res) +{ + struct irq_devres *this = res; + + free_irq(this->irq, this->dev_id); +} + +static int devm_irq_match(struct device *dev, void *res, void *data) +{ + struct irq_devres *this = res, *match = data; + + return this->irq == match->irq && this->dev_id == match->dev_id; +} + +/** + * devm_request_irq - allocate an interrupt line for a managed device + * @dev: device to request interrupt for + * @irq: Interrupt line to allocate + * @handler: Function to be called when the IRQ occurs + * @irqflags: Interrupt type flags + * @devname: An ascii name for the claiming device + * @dev_id: A cookie passed back to the handler function + * + * Except for the extra @dev argument, this function takes the + * same arguments and performs the same function as + * request_irq(). IRQs requested with this function will be + * automatically freed on driver detach. + * + * If an IRQ allocated with this function needs to be freed + * separately, dev_free_irq() must be used. + */ +int devm_request_irq(struct device *dev, unsigned int irq, + irq_handler_t handler, unsigned long irqflags, + const char *devname, void *dev_id) +{ + struct irq_devres *dr; + int rc; + + dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres), + GFP_KERNEL); + if (!dr) + return -ENOMEM; + + rc = request_irq(irq, handler, irqflags, devname, dev_id); + if (rc) { + kfree(dr); + return rc; + } + + dr->irq = irq; + dr->dev_id = dev_id; + devres_add(dev, dr); + + return 0; +} +EXPORT_SYMBOL(devm_request_irq); + +/** + * devm_free_irq - free an interrupt + * @dev: device to free interrupt for + * @irq: Interrupt line to free + * @dev_id: Device identity to free + * + * Except for the extra @dev argument, this function takes the + * same arguments and performs the same function as free_irq(). + * This function instead of free_irq() should be used to manually + * free IRQs allocated with dev_request_irq(). + */ +void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id) +{ + struct irq_devres match_data = { irq, dev_id }; + + free_irq(irq, dev_id); + WARN_ON(devres_destroy(dev, devm_irq_release, devm_irq_match, + &match_data)); +} +EXPORT_SYMBOL(devm_free_irq); diff --git a/kernel/module.c b/kernel/module.c index d0f2260a021..8a94e054230 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -537,6 +537,8 @@ static int already_uses(struct module *a, struct module *b) static int use_module(struct module *a, struct module *b) { struct module_use *use; + int no_warn; + if (b == NULL || already_uses(a, b)) return 1; if (!strong_try_module_get(b)) @@ -552,6 +554,7 @@ static int use_module(struct module *a, struct module *b) use->module_which_uses = a; list_add(&use->list, &b->modules_which_use_me); + no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name); return 1; } @@ -569,6 +572,7 @@ static void module_unload_free(struct module *mod) module_put(i); list_del(&use->list); kfree(use); + sysfs_remove_link(i->holders_dir, mod->name); /* There can be at most one match. */ break; } @@ -1106,9 +1110,7 @@ static void module_remove_modinfo_attrs(struct module *mod) kfree(mod->modinfo_attrs); } -static int mod_sysfs_setup(struct module *mod, - struct kernel_param *kparam, - unsigned int num_params) +static int mod_sysfs_init(struct module *mod) { int err; @@ -1125,21 +1127,30 @@ static int mod_sysfs_setup(struct module *mod, kobj_set_kset_s(&mod->mkobj, module_subsys); mod->mkobj.mod = mod; - /* delay uevent until full sysfs population */ kobject_init(&mod->mkobj.kobj); + +out: + return err; +} + +static int mod_sysfs_setup(struct module *mod, + struct kernel_param *kparam, + unsigned int num_params) +{ + int err; + + /* delay uevent until full sysfs population */ err = kobject_add(&mod->mkobj.kobj); if (err) goto out; - mod->drivers_dir = kobject_add_dir(&mod->mkobj.kobj, "drivers"); - if (!mod->drivers_dir) { - err = -ENOMEM; + mod->holders_dir = kobject_add_dir(&mod->mkobj.kobj, "holders"); + if (!mod->holders_dir) goto out_unreg; - } err = module_param_sysfs_setup(mod, kparam, num_params); if (err) - goto out_unreg_drivers; + goto out_unreg_holders; err = module_add_modinfo_attrs(mod); if (err) @@ -1150,8 +1161,8 @@ static int mod_sysfs_setup(struct module *mod, out_unreg_param: module_param_sysfs_remove(mod); -out_unreg_drivers: - kobject_unregister(mod->drivers_dir); +out_unreg_holders: + kobject_unregister(mod->holders_dir); out_unreg: kobject_del(&mod->mkobj.kobj); kobject_put(&mod->mkobj.kobj); @@ -1163,7 +1174,10 @@ static void mod_kobject_remove(struct module *mod) { module_remove_modinfo_attrs(mod); module_param_sysfs_remove(mod); - kobject_unregister(mod->drivers_dir); + if (mod->mkobj.drivers_dir) + kobject_unregister(mod->mkobj.drivers_dir); + if (mod->holders_dir) + kobject_unregister(mod->holders_dir); kobject_unregister(&mod->mkobj.kobj); } @@ -1768,6 +1782,10 @@ static struct module *load_module(void __user *umod, /* Now we've moved module, initialize linked lists, etc. */ module_unload_init(mod); + /* Initialize kobject, so we can reference it. */ + if (mod_sysfs_init(mod) != 0) + goto cleanup; + /* Set up license info based on the info section */ set_license(mod, get_modinfo(sechdrs, infoindex, "license")); @@ -2340,19 +2358,43 @@ static char *make_driver_name(struct device_driver *drv) return driver_name; } +static void module_create_drivers_dir(struct module_kobject *mk) +{ + if (!mk || mk->drivers_dir) + return; + + mk->drivers_dir = kobject_add_dir(&mk->kobj, "drivers"); +} + void module_add_driver(struct module *mod, struct device_driver *drv) { char *driver_name; int no_warn; + struct module_kobject *mk = NULL; + + if (!drv) + return; + + if (mod) + mk = &mod->mkobj; + else if (drv->mod_name) { + struct kobject *mkobj; + + /* Lookup built-in module entry in /sys/modules */ + mkobj = kset_find_obj(&module_subsys.kset, drv->mod_name); + if (mkobj) + mk = container_of(mkobj, struct module_kobject, kobj); + } - if (!mod || !drv) + if (!mk) return; /* Don't check return codes; these calls are idempotent */ - no_warn = sysfs_create_link(&drv->kobj, &mod->mkobj.kobj, "module"); + no_warn = sysfs_create_link(&drv->kobj, &mk->kobj, "module"); driver_name = make_driver_name(drv); if (driver_name) { - no_warn = sysfs_create_link(mod->drivers_dir, &drv->kobj, + module_create_drivers_dir(mk); + no_warn = sysfs_create_link(mk->drivers_dir, &drv->kobj, driver_name); kfree(driver_name); } @@ -2367,10 +2409,10 @@ void module_remove_driver(struct device_driver *drv) return; sysfs_remove_link(&drv->kobj, "module"); - if (drv->owner && drv->owner->drivers_dir) { + if (drv->owner && drv->owner->mkobj.drivers_dir) { driver_name = make_driver_name(drv); if (driver_name) { - sysfs_remove_link(drv->owner->drivers_dir, + sysfs_remove_link(drv->owner->mkobj.drivers_dir, driver_name); kfree(driver_name); } diff --git a/kernel/params.c b/kernel/params.c index 718945da8f5..553cf7d6a4b 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -30,6 +30,8 @@ #define DEBUGP(fmt, a...) #endif +static struct kobj_type module_ktype; + static inline char dash2underscore(char c) { if (c == '-') @@ -561,14 +563,11 @@ static void __init kernel_param_sysfs_setup(const char *name, mk->mod = THIS_MODULE; kobj_set_kset_s(mk, module_subsys); kobject_set_name(&mk->kobj, name); - ret = kobject_register(&mk->kobj); + kobject_init(&mk->kobj); + ret = kobject_add(&mk->kobj); BUG_ON(ret < 0); - - /* no need to keep the kobject if no parameter is exported */ - if (!param_sysfs_setup(mk, kparam, num_params, name_skip)) { - kobject_unregister(&mk->kobj); - kfree(mk); - } + param_sysfs_setup(mk, kparam, num_params, name_skip); + kobject_uevent(&mk->kobj, KOBJ_ADD); } /* @@ -674,6 +673,19 @@ static struct sysfs_ops module_sysfs_ops = { .store = module_attr_store, }; +static int uevent_filter(struct kset *kset, struct kobject *kobj) +{ + struct kobj_type *ktype = get_ktype(kobj); + + if (ktype == &module_ktype) + return 1; + return 0; +} + +static struct kset_uevent_ops module_uevent_ops = { + .filter = uevent_filter, +}; + #else static struct sysfs_ops module_sysfs_ops = { .show = NULL, @@ -685,7 +697,7 @@ static struct kobj_type module_ktype = { .sysfs_ops = &module_sysfs_ops, }; -decl_subsys(module, &module_ktype, NULL); +decl_subsys(module, &module_ktype, &module_uevent_ops); /* * param_sysfs_init - wrapper for built-in params support diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index ed296225dcd..95f6657fff7 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -131,3 +131,29 @@ config SUSPEND_SMP bool depends on HOTPLUG_CPU && X86 && PM default y + +config APM_EMULATION + tristate "Advanced Power Management Emulation" + depends on PM && SYS_SUPPORTS_APM_EMULATION + help + APM is a BIOS specification for saving power using several different + techniques. This is mostly useful for battery powered laptops with + APM compliant BIOSes. If you say Y here, the system time will be + reset after a RESUME operation, the /proc/apm device will provide + battery status information, and user-space programs will receive + notification of APM "events" (e.g. battery status change). + + In order to use APM, you will need supporting software. For location + and more information, read <file:Documentation/pm.txt> and the + Battery Powered Linux mini-HOWTO, available from + <http://www.tldp.org/docs.html#howto>. + + This driver does not spin down disk drives (see the hdparm(8) + manpage ("man 8 hdparm") for that), and it doesn't turn off + VESA-compliant "green" monitors. + + Generally, if you don't have a battery in your machine, there isn't + much point in using this driver and you should say N. If you get + random kernel OOPSes or reboots that don't seem to be related to + anything, try disabling/enabling this option (or disabling/enabling + APM in your BIOS). diff --git a/kernel/resource.c b/kernel/resource.c index 7b9a497419d..2a3f8863658 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -17,6 +17,7 @@ #include <linux/fs.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> +#include <linux/device.h> #include <asm/io.h> @@ -618,6 +619,67 @@ void __release_region(struct resource *parent, resource_size_t start, EXPORT_SYMBOL(__release_region); /* + * Managed region resource + */ +struct region_devres { + struct resource *parent; + resource_size_t start; + resource_size_t n; +}; + +static void devm_region_release(struct device *dev, void *res) +{ + struct region_devres *this = res; + + __release_region(this->parent, this->start, this->n); +} + +static int devm_region_match(struct device *dev, void *res, void *match_data) +{ + struct region_devres *this = res, *match = match_data; + + return this->parent == match->parent && + this->start == match->start && this->n == match->n; +} + +struct resource * __devm_request_region(struct device *dev, + struct resource *parent, resource_size_t start, + resource_size_t n, const char *name) +{ + struct region_devres *dr = NULL; + struct resource *res; + + dr = devres_alloc(devm_region_release, sizeof(struct region_devres), + GFP_KERNEL); + if (!dr) + return NULL; + + dr->parent = parent; + dr->start = start; + dr->n = n; + + res = __request_region(parent, start, n, name); + if (res) + devres_add(dev, dr); + else + devres_free(dr); + + return res; +} +EXPORT_SYMBOL(__devm_request_region); + +void __devm_release_region(struct device *dev, struct resource *parent, + resource_size_t start, resource_size_t n) +{ + struct region_devres match_data = { parent, start, n }; + + __release_region(parent, start, n); + WARN_ON(devres_destroy(dev, devm_region_release, devm_region_match, + &match_data)); +} +EXPORT_SYMBOL(__devm_release_region); + +/* * Called from init/main.c to reserve IO ports. */ #define MAXRESERVE 4 |