Re: [PATCH] futex: move debug_rt_mutex_free_waiter() further down

[Sebastian Andrzej Siewior]

On 2017-03-08 16:29:02 [+0100], To Peter Zijlstra wrote:
> Without this, futex_requeue_pi_signal_restart will trigger
> 
> |kernel BUG at locking/rtmutex_common.h:55!
> |Call Trace:
> | rt_mutex_cleanup_proxy_lock+0x54/0x90
> | futex_wait_requeue_pi.constprop.21+0x387/0x4d0
> | do_futex+0x289/0xbf0
> |RIP: remove_waiter+0x157/0x170 RSP: ffffc90000e0fbe0
> 
> with BUG 2222222222222222 != pointer once this patch is applied.

My wording is wrong. This BUG_ON() statement described here in this
patch (together with the test case mentioned) will trigger once

 "[PATCH -v5 12/14] futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock()"

is applied.

Sebastian