/* * soundbus * * Copyright 2006 Johannes Berg * * GPL v2, can be found in COPYING. */ #include #include "soundbus.h" MODULE_AUTHOR("Johannes Berg "); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Apple Soundbus"); struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev) { struct device *tmp; if (!dev) return NULL; tmp = get_device(&dev->ofdev.dev); if (tmp) return to_soundbus_device(tmp); else return NULL; } EXPORT_SYMBOL_GPL(soundbus_dev_get); void soundbus_dev_put(struct soundbus_dev *dev) { if (dev) put_device(&dev->ofdev.dev); } EXPORT_SYMBOL_GPL(soundbus_dev_put); static int soundbus_probe(struct device *dev) { int error = -ENODEV; struct soundbus_driver *drv; struct soundbus_dev *soundbus_dev; drv = to_soundbus_driver(dev->driver); soundbus_dev = to_soundbus_device(dev); if (!drv->probe) return error; soundbus_dev_get(soundbus_dev); error = drv->probe(soundbus_dev); if (error) soundbus_dev_put(soundbus_dev); return error; } static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env) { struct soundbus_dev * soundbus_dev; struct platform_device * of; const char *compat; int retval = 0; int cplen, seen = 0; if (!dev) return -ENODEV; soundbus_dev = to_soundbus_device(dev); if (!soundbus_dev) return -ENODEV; of = &soundbus_dev->ofdev; /* stuff we want to pass to /sbin/hotplug */ retval = add_uevent_var(env, "OF_NAME=%s", of->dev.of_node->name); if (retval) return retval; retval = add_uevent_var(env, "OF_TYPE=%s", of->dev.of_node->type); if (retval) return retval; /* Since the compatible field can contain pretty much anything * it's not really legal to split it out with commas. We split it * up using a number of environment variables instead. */ compat = of_get_property(of->dev.of_node, "compatible", &cplen); while (compat && cplen > 0) { int tmp = env->buflen; retval = add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat); if (retval) return retval; compat += env->buflen - tmp; cplen -= env->buflen - tmp; seen += 1; } retval = add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen); if (retval) return retval; retval = add_uevent_var(env, "MODALIAS=%s", soundbus_dev->modalias); return retval; } static int soundbus_device_remove(struct device *dev) { struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); struct soundbus_driver * drv = to_soundbus_driver(dev->driver); if (dev->driver && drv->remove) drv->remove(soundbus_dev); soundbus_dev_put(soundbus_dev); return 0; } static void soundbus_device_shutdown(struct device *dev) { struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); struct soundbus_driver * drv = to_soundbus_driver(dev->driver); if (dev->driver && drv->shutdown) drv->shutdown(soundbus_dev); } /* soundbus_dev_attrs is declared in sysfs.c */ ATTRIBUTE_GROUPS(soundbus_dev); static struct bus_type soundbus_bus_type = { .name = "aoa-soundbus", .probe = soundbus_probe, .uevent = soundbus_uevent, .remove = soundbus_device_remove, .shutdown = soundbus_device_shutdown, .dev_groups = soundbus_dev_groups, }; int soundbus_add_one(struct soundbus_dev *dev) { static int devcount; /* sanity checks */ if (!dev->attach_codec || !dev->ofdev.dev.of_node || dev->pcmname || dev->pcmid != -1) { printk(KERN_ERR "soundbus: adding device failed sanity check!\n"); return -EINVAL; } dev_set_name(&dev->ofdev.dev, "soundbus:%x", ++devcount); dev->ofdev.dev.bus = &soundbus_bus_type; return of_device_register(&dev->ofdev); } EXPORT_SYMBOL_GPL(soundbus_add_one); void soundbus_remove_one(struct soundbus_dev *dev) { of_device_unregister(&dev->ofdev); } EXPORT_SYMBOL_GPL(soundbus_remove_one); int soundbus_register_driver(struct soundbus_driver *drv) { /* initialize common driver fields */ drv->driver.name = drv->name; drv->driver.bus = &soundbus_bus_type; /* register with core */ return driver_register(&drv->driver); } EXPORT_SYMBOL_GPL(soundbus_register_driver); void soundbus_unregister_driver(struct soundbus_driver *drv) { driver_unregister(&drv->driver); } EXPORT_SYMBOL_GPL(soundbus_unregister_driver); static int __init soundbus_init(void) { return bus_register(&soundbus_bus_type); } static void __exit soundbus_exit(void) { bus_unregister(&soundbus_bus_type); } subsys_initcall(soundbus_init); module_exit(soundbus_exit); name='ignorews' onchange='this.form.submit();'>mode:
authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /tools/testing/selftests/memory-hotplug/Makefile
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/testing/selftests/memory-hotplug/Makefile')