On Tue, 2017-04-18 at 00:24:39 UTC, Tyrel Datwyler wrote: > For cpus present at boot each logical cpu acquires a reference to the > associated device node of the core. This happens in register_cpu() which > is called by topology_init(). The result of this is that we end up with > a reference held by each thread of the core. However, these references > are never freed if the cpu core is dlpar removed. > > This patch fixes the reference leaks by acquiring and releasing the > references in the cpu hotplug callbacks un/register_cpu_online(). > With this patch symmetric reference counting is observed with both cpus > present at boot, and those dlpar added after boot. > > Cc: stable@xxxxxxxxxxxxxxx > fixes: f86e4718f24b ("driver/core: cpu: initialize of_node in cpu's device struture") > Signed-off-by: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx> Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/e76ca27790a514590af782f83f6eae cheers