Skip to main content

Browse the archive

Revision 5f9dd5c9fd4efacc9f8c36c0b3c17a4308bbe4d9 authored by Jingoo Han on 30 July 2012, 21:40:36 UTC, committed by Linus Torvalds on 31 July 2012, 00:25:15 UTC 
backlight: atmel-pwm-bl: use devm_gpio_request()
 
The devm_ functions allocate memory that is released when a driver
detaches.  This patch uses devm_gpio_request() for these functions.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent b4a7461
Raw File
cpu-notifier-error-inject.c 
#include <linux/kernel.h>
#include <linux/cpu.h>
#include <linux/module.h>
#include <linux/notifier.h>

static int priority;
static int cpu_up_prepare_error;
static int cpu_down_prepare_error;

module_param(priority, int, 0);
MODULE_PARM_DESC(priority, "specify cpu notifier priority");

module_param(cpu_up_prepare_error, int, 0644);
MODULE_PARM_DESC(cpu_up_prepare_error,
		"specify error code to inject CPU_UP_PREPARE action");

module_param(cpu_down_prepare_error, int, 0644);
MODULE_PARM_DESC(cpu_down_prepare_error,
		"specify error code to inject CPU_DOWN_PREPARE action");

static int err_inject_cpu_callback(struct notifier_block *nfb,
				unsigned long action, void *hcpu)
{
	int err = 0;

	switch (action) {
	case CPU_UP_PREPARE:
	case CPU_UP_PREPARE_FROZEN:
		err = cpu_up_prepare_error;
		break;
	case CPU_DOWN_PREPARE:
	case CPU_DOWN_PREPARE_FROZEN:
		err = cpu_down_prepare_error;
		break;
	}
	if (err)
		printk(KERN_INFO "Injecting error (%d) at cpu notifier\n", err);

	return notifier_from_errno(err);
}

static struct notifier_block err_inject_cpu_notifier = {
	.notifier_call = err_inject_cpu_callback,
};

static int err_inject_init(void)
{
	err_inject_cpu_notifier.priority = priority;

	return register_hotcpu_notifier(&err_inject_cpu_notifier);
}

static void err_inject_exit(void)
{
	unregister_hotcpu_notifier(&err_inject_cpu_notifier);
}

module_init(err_inject_init);
module_exit(err_inject_exit);

MODULE_DESCRIPTION("CPU notifier error injection module");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
back to top