Documentation: ABI: document /sys/devices/system/cpu/

This interface has been around for a long time, but hasn't been
officially documented.

Document the top level sysfs directory for CPU attributes.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 175bb4f70512..86126b187ae6 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -1,3 +1,15 @@
+What:           /sys/devices/system/cpu/
+Date:           pre-git history
+Contact:        Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:
+                A collection of both global and individual CPU attributes
+
+                Individual CPU attributes are contained in subdirectories
+                named by the kernel's logical CPU number, e.g.:
+
+                /sys/devices/system/cpu/cpu#/
+
+
 What:      /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X
 Date:      August 2008
 KernelVersion:  2.6.27