Messages in this thread | | | Date | Wed, 29 May 2013 10:27:35 +0200 | From | Jean Delvare <> | Subject | What is listed in /sys/module? |
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Hi Greg, Rusty,
I have a question related to /sys/module and can't seem to find the answer by myself so I hope you can explain.
I noticed that /sys/module contains more than /proc/modules. At first I thought that any potentially modular piece of code would show up in /sys/module, so /sys/module would include both actual modules and "built-in modules".
However I then noticed that some built-in modules do _not_ show up in /sys/module. For example, I have USB and I2C core support built into my 3.9.4 kernel, /sys/module/usbcore exists but /sys/module/i2c_core does not. CONFIG_SENSORS_W83795=y did not give me /sys/module/w83795 either.
So my questions are: 1* What exactly is supposed to show up in /sys/module? Documentation/ABI/stable/sysfs-module says:
/sys/module/MODULENAME The name of the module that is in the kernel. This module name will show up either if the module is built directly into the kernel, or if it is loaded as a dynamic module.
But my tests above contradict this statement.
And more precisely: 2* For what reason do some built-in modules show up in /sys/module and others do not? Is it a bug?
Thanks, -- Jean Delvare
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