From: Eric Saint Etienne <eric.saint.etienne@xxxxxxxxxx> Date: Sat, 16 Sep 2017 05:36:03 +0100 > To get a snapshot as complete as possible of what the system is > composed of, > this commit adds the ability to browse machine description from sysfs. > > This commit eases porting of user-space utilities that exist on other > architectures > like lshw for instance. > > Whenever the HV changes machine description content, sysfs will be > autopmatically > re-populated. This is done almost atomically by swapping the old mdesc > sysfs folder > with the new one. While the tree under the new folder is being > created, reading from > /sys/firmware/mdesc will return EAGAIN. That way userspace programs > will not see > stale content in /sys/firmware/mdesc > > Signed-off-by: Eric Saint Etienne <eric.saint.etienne@xxxxxxxxxx> > Reviewed-by: Dave Aldridge <david.j.aldridge@xxxxxxxxxx> Please explain why /dev/mdesc could not be extended to do what you need, such as sending an event to userspace. There is absolutely no reason to present a formatted version of mdesc under sysfs. That is entirely a userspace problem, where the userspace component grabs the mdesc via /dev/mdesc and does whatever it wants to do with that image. Your patch was also whitespace damaged by your email client. Thank you. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
