mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-22 17:55:57 +01:00
56738a1c70
Unsquashed version at v2-rc-unsquashed, but that cannot be merged as it breaks bisects at several points. All bugs will not bisect to this humongous change. It all started with a conversion of the Bash scripts to Python, mainly because I couldn't stand not being able to properly use --options for run which has a million options. Then since that required a full testing, I decided to do all the refactorings that I had in mind at once, and so I did and it became v2-rc. This is the largest patch I have ever done! OMG a few weeks of extra time. I'm never writing a Bash script for anything that starts getting big again. Some of the features are: * separate build-qemu and build-gem5 commands * common: convert scripts to python. Add --option for everything * rename build to build-buildroot now that we are splitting all the build commands, Linux kernel to follow * move all git submodules to submodules/ and all buildroot packages to packages/ * refactor the out/ structure. Keep projects on toplevel, because guest projects separate archs and host ones don't, making a toplevel arch wrong * do-release: rename to just release https://stackoverflow.com/questions/16174992/cant-get-argparse-to-read-quoted-string-with-dashes-in-it * run: add --terminal and explain gem5 pdb * just track the lvimrc * store CLI kernel config fragment inside buildlroot to avoid conflicts * gem5: document m5 initparam * readme: make a bunch of things awesomer * readme: fix broken refs * parsec-benchmark: update to 75d55ac446a43c47efb1044844a108c6c330184c Could not fetch otherwise. * gem5: M5_OVERRIDE_PY_SOURCE
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#irq-ko */
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#include <linux/fs.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/uaccess.h> /* copy_from_user, copy_to_user */
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#define NAME "lkmc_irq"
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#define MAX_IRQS 256
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static int irqs[MAX_IRQS];
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static int major;
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/**
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* Return value from kernel docs:*
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*
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* enum irqreturn
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* @IRQ_NONE interrupt was not from this device or was not handled
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* @IRQ_HANDLED interrupt was handled by this device
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* @IRQ_WAKE_THREAD handler requests to wake the handler thread
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*/
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static irqreturn_t handler(int irq, void *dev)
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{
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pr_info("handler irq = %d dev = %d\n", irq, *(int *)dev);
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return IRQ_NONE;
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}
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static const struct file_operations fops;
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static int myinit(void)
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{
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int ret, i;
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major = register_chrdev(0, NAME, &fops);
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for (i = 0; i < MAX_IRQS; ++i) {
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ret = request_irq(
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i,
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handler,
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IRQF_SHARED,
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"myirqhandler0",
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&major
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);
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irqs[i] = ret;
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pr_info("request_irq irq = %d ret = %d\n", i, ret);
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}
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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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int i;
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for (i = 0; i < MAX_IRQS; ++i) {
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if (!irqs[i]) {
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free_irq(i, &major);
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}
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}
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unregister_chrdev(major, NAME);
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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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