On Wed, 19 Apr 2017 13:42:40 +0200 <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > The patch below does not apply to the 4.4-stable tree. > If someone wants it applied there, or to any other stable or longterm > tree, then please email the backport, including the original git commit > id to <stable@xxxxxxxxxxxxxxx>. > [..] > > To fix it, use ftrace_clear_pids() to unregister the probe. As > instance_rmdir() already updated ftrace codes, it can just free the > filter safely. > > Link: http://lkml.kernel.org/r/20170417024430.21194-2-namhyung@xxxxxxxxxx > > Fixes: 0c8916c34203 ("tracing: Add rmdir to remove multibuffer instances") Hmm, this is wrong. It should have been: Fixes: 345ddcc882d8 ("ftrace: Have set_ftrace_pid use the bitmap like events do") Which was added in 4.8. I doesn't need to go back further than that. Thanks! -- Steve