[linux-2.6-block.git] / fs / sysfs / Kconfig

# SPDX-License-Identifier: GPL-2.0-only
config SYSFS
	bool "sysfs file system support" if EXPERT
	default y
	select KERNFS
	help
	The sysfs filesystem is a virtual filesystem that the kernel uses to
	export internal kernel objects, their attributes, and their
	relationships to one another.

	Users can use sysfs to ascertain useful information about the running
	kernel, such as the devices the kernel has discovered on each bus and
	which driver each is bound to. sysfs can also be used to tune devices
	and other kernel subsystems.

	Some system agents rely on the information in sysfs to operate.
	/sbin/hotplug uses device and object attributes in sysfs to assist in
	delegating policy decisions, like persistently naming devices.

	sysfs is currently used by the block subsystem to mount the root
	partition.  If sysfs is disabled you must specify the boot device on
	the kernel boot command line via its major and minor numbers.  For
	example, "root=03:01" for /dev/hda1.

	Designers of embedded systems may wish to say N here to conserve space.
Commit	Line	Data
ec8f24b7	1	# SPDX-License-Identifier: GPL-2.0-only
5f3a211a	2	config SYSFS
6a108a14	3	bool "sysfs file system support" if EXPERT
5f3a211a	4	default y
ba341d55	5	select KERNFS
5f3a211a AD	6	help
	7	The sysfs filesystem is a virtual filesystem that the kernel uses to
	8	export internal kernel objects, their attributes, and their
	9	relationships to one another.
	10
	11	Users can use sysfs to ascertain useful information about the running
	12	kernel, such as the devices the kernel has discovered on each bus and
	13	which driver each is bound to. sysfs can also be used to tune devices
	14	and other kernel subsystems.
	15
	16	Some system agents rely on the information in sysfs to operate.
	17	/sbin/hotplug uses device and object attributes in sysfs to assist in
	18	delegating policy decisions, like persistently naming devices.
	19
	20	sysfs is currently used by the block subsystem to mount the root
	21	partition. If sysfs is disabled you must specify the boot device on
	22	the kernel boot command line via its major and minor numbers. For
	23	example, "root=03:01" for /dev/hda1.
	24
	25	Designers of embedded systems may wish to say N here to conserve space.