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linux-yocto/Documentation/ABI/stable/sysfs-module
Jean Delvare 86f120031a ABI: Clarify when /sys/module/MODULENAME is created 
/sys/module/MODULENAME is not created unconditionally. This can be
confusing so document the current conditions.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Rob Landley <rob@landley.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2013-07-02 15:38:20 +09:30

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What: /sys/module Description: The /sys/module tree consists of the following structure:

/sys/module/MODULENAME
	The name of the module that is in the kernel.  This
	module name will always show up if the module is loaded as a
	dynamic module.  If it is built directly into the kernel, it
	will only show up if it has a version or at least one
	parameter.

	Note: The conditions of creation in the built-in case are not
	by design and may be removed in the future.

/sys/module/MODULENAME/parameters
	This directory contains individual files that are each
	individual parameters of the module that are able to be
	changed at runtime.  See the individual module
	documentation as to the contents of these parameters and
	what they accomplish.

	Note: The individual parameter names and values are not
	considered stable, only the fact that they will be
	placed in this location within sysfs.  See the
	individual driver documentation for details as to the
	stability of the different parameters.

/sys/module/MODULENAME/refcnt
	If the module is able to be unloaded from the kernel, this file
	will contain the current reference count of the module.

	Note: If the module is built into the kernel, or if the
	CONFIG_MODULE_UNLOAD kernel configuration value is not enabled,
	this file will not be present.