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https://github.com/cirosantilli/linux-kernel-module-cheat.git
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dae60aa248
Then inside, split packages/lkmc into kernel_modules and userland, to keep userland out of the kernel_modules parent path, which makes no sense. Copy built modules and userland to the output rootfs overlay. Document Linux distro tradeoffs.
42 lines
788 B
C
42 lines
788 B
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#workqueues */
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#include <linux/delay.h> /* usleep_range */
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h> /* atomic_t */
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#include <linux/workqueue.h>
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static struct workqueue_struct *queue;
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static atomic_t run = ATOMIC_INIT(1);
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static void work_func(struct work_struct *work)
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{
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int i = 0;
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while (atomic_read(&run)) {
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pr_info("%d\n", i);
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usleep_range(1000000, 1000001);
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i++;
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if (i == 10)
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i = 0;
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}
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}
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DECLARE_WORK(work, work_func);
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static int myinit(void)
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{
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queue = create_workqueue("myworkqueue");
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queue_work(queue, &work);
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return 0;
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}
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static void myexit(void)
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{
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atomic_set(&run, 0);
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destroy_workqueue(queue);
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}
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module_init(myinit)
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module_exit(myexit)
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MODULE_LICENSE("GPL");
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