cregit-Linux how code gets into the kernel

Release 4.7 kernel/irq/devres.c

Directory: kernel/irq
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/gfp.h>

/*
 * 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); }

Contributors

PersonTokensPropCommitsCommitProp
al viroal viro33100.00%1100.00%
Total33100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
al viroal viro48100.00%1100.00%
Total48100.00%1100.00%

/** * devm_request_threaded_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 * @thread_fn: function to be called in a threaded interrupt context. NULL * for devices which handle everything in @handler * @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_threaded_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, devm_free_irq() must be used. */
int devm_request_threaded_irq(struct device *dev, unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, 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_threaded_irq(irq, handler, thread_fn, irqflags, devname, dev_id); if (rc) { devres_free(dr); return rc; } dr->irq = irq; dr->dev_id = dev_id; devres_add(dev, dr); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
al viroal viro11093.22%133.33%
arjan van de venarjan van de ven75.93%133.33%
tejun heotejun heo10.85%133.33%
Total118100.00%3100.00%

EXPORT_SYMBOL(devm_request_threaded_irq); /** * devm_request_any_context_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 * @thread_fn: function to be called in a threaded interrupt context. NULL * for devices which handle everything in @handler * @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_any_context_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, devm_free_irq() must be used. */
int devm_request_any_context_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_any_context_irq(irq, handler, irqflags, devname, dev_id); if (rc < 0) { devres_free(dr); return rc; } dr->irq = irq; dr->dev_id = dev_id; devres_add(dev, dr); return rc; }

Contributors

PersonTokensPropCommitsCommitProp
stephen boydstephen boyd11297.39%150.00%
axel linaxel lin32.61%150.00%
Total115100.00%2100.00%

EXPORT_SYMBOL(devm_request_any_context_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 devm_request_irq(). */
void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id) { struct irq_devres match_data = { irq, dev_id }; WARN_ON(devres_destroy(dev, devm_irq_release, devm_irq_match, &match_data)); free_irq(irq, dev_id); }

Contributors

PersonTokensPropCommitsCommitProp
al viroal viro4386.00%150.00%
maxin b. johnmaxin b. john714.00%150.00%
Total50100.00%2100.00%

EXPORT_SYMBOL(devm_free_irq);

Overall Contributors

PersonTokensPropCommitsCommitProp
al viroal viro26665.20%220.00%
stephen boydstephen boyd11828.92%110.00%
arjan van de venarjan van de ven81.96%110.00%
maxin b. johnmaxin b. john71.72%110.00%
axel linaxel lin30.74%110.00%
robert p. j. dayrobert p. j. day30.74%110.00%
tejun heotejun heo10.25%110.00%
emilio lopezemilio lopez10.25%110.00%
baruch siachbaruch siach10.25%110.00%
Total408100.00%10100.00%
Directory: kernel/irq
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
{% endraw %}