2019-05-19 12:07:45 +00:00
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# SPDX-License-Identifier: GPL-2.0-only
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2009-01-22 07:40:58 +00:00
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config SYSFS
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2011-01-20 22:44:16 +00:00
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bool "sysfs file system support" if EXPERT
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2009-01-22 07:40:58 +00:00
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default y
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2014-02-03 19:09:17 +00:00
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select KERNFS
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2009-01-22 07:40:58 +00:00
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help
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The sysfs filesystem is a virtual filesystem that the kernel uses to
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export internal kernel objects, their attributes, and their
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relationships to one another.
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Users can use sysfs to ascertain useful information about the running
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kernel, such as the devices the kernel has discovered on each bus and
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which driver each is bound to. sysfs can also be used to tune devices
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and other kernel subsystems.
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Some system agents rely on the information in sysfs to operate.
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/sbin/hotplug uses device and object attributes in sysfs to assist in
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delegating policy decisions, like persistently naming devices.
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sysfs is currently used by the block subsystem to mount the root
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partition. If sysfs is disabled you must specify the boot device on
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the kernel boot command line via its major and minor numbers. For
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example, "root=03:01" for /dev/hda1.
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Designers of embedded systems may wish to say N here to conserve space.
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