Re: [PATCH v3 4/4] Documentation: ABI: /sys/firmware/devicetree/overlays

On Mon, Apr 27, 2015 at 08:51:20PM +0300, Pantelis Antoniou wrote:

Hi Greg,

quoted

On Apr 24, 2015, at 23:31 , Greg KH [off-list ref] wrote:

On Fri, Apr 24, 2015 at 12:45:44PM +0300, Pantelis Antoniou wrote:

quoted

Documentation ABI entry for overlays sysfs entries.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou-OWPKS81ov/FWk0Htik3J/w@public.gmane.org>
---
.../ABI/testing/sysfs-firmware-devicetree-overlays | 23 ++++++++++++++++++++++
1 file changed, 23 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-firmware-devicetree-overlays

diff --git a/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
new file mode 100644
index 0000000..6b81f1c
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays

@@ -0,0 +1,23 @@
+What:		/sys/firmware/devicetree/overlays/
+Date:		March 2015
+Contact:	Pantelis Antoniou <pantelis.antoniou-OWPKS81ov/FWk0Htik3J/w@public.gmane.org>
+Description:
+		This directory contains the applied device tree overlays of
+		the running system, as directories of the overlay id.

"as"?

quoted

+
+		enable: The master enable switch, by default is 1, and when
+		        set to 0 it cannot be re-enabled for security reasons.

What are those reasons?

There’s a whole subthread with Grant & Kees going over security concerns.

http://comments.gmane.org/gmane.linux.drivers.devicetree/101871

Great, document it here please, so that others know this :)

thanks,

greg k-h