Jean Delvare <[email protected]> writes: > 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.
Yes. /sys/module entries are created for builtin "modules" with parameters. This is because, the module names are discovered by scouring the parameters: see param_sysfs_builtin(). Two things to note about builtin modules: 1) There is nothing other than parameters in /sys/module/, except a uevent which is used for managing the parameters. So, without parameters, it would be an empty directory. 2) We actually do generate a list of builtin modules these days, called modules.builtin. So we could generate sysfs dirs from this. If you want to make it consistent, I look forward to your patch! Cheers, Rusty. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
