33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
This is Task 11 of the Eudyptula Challenge
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You made a successful patch to the kernel source tree, that's a great
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step!
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But, let's not rest, time to get back to code.
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Remember that mess of kobject and sysfs code back in task 09? Let's
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move one level up the tree and start to mess with devices and not raw
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kobjects.
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For this task:
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- Write a patch against any driver that you are currently using on
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your machine. So first you have to figure out which drivers you are
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using, and where the source code in the kernel tree is for that
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driver.
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- In that driver, add a sysfs file to show up in the /sys/devices/
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tree for the device that is called "id". As you might expect, this
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file follows the same rules as task 09 as for what you can read and
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write to it.
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- The file is to show up only for devices that are controlled by a
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single driver, not for all devices of a single type (like all USB
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devices. But all USB mailbox LEDs would be acceptable, if you
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happen to have the device that that driver controls.)
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Submit both the patch, in proper kernel commit form, and "proof" of it
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working properly on your machine.
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And as always, please use your id in the subject line. If you happened
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to forget it, as it has been a while since I reminded you of it, it is
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"[redacted]".
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