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Re: [patch V3 28/32] s390: Prevent hotplug rwsem recursion

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On Wed, May 24, 2017 at 10:15:39AM +0200, Thomas Gleixner wrote:
> The text patching functions which are invoked from jump_label and kprobes
> code are protected against cpu hotplug at the call sites.
> 
> Use stop_machine_cpuslocked() to avoid recursion on the cpu hotplug
> rwsem. stop_machine_cpuslocked() contains a lockdep assertion to catch any
> unprotected callers.
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Cc: linux-s390@vger.kernel.org
> ---
>  arch/s390/kernel/jump_label.c |    2 +-
>  arch/s390/kernel/kprobes.c    |    4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)

Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>

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[patch V3 00/32] cpu/hotplug: Convert get_online_cpus() to a  percpu_rwsem Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
  [patch V3 12/32] hwtracing/coresight-etm4x: Use  cpuhp_setup_state_nocalls_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
  [patch V3 28/32] s390: Prevent hotplug rwsem recursion Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
    Re: [patch V3 28/32] s390: Prevent hotplug rwsem recursion Heiko Carstens <heiko.carstens@de.ibm.com> - 2017-05-24 13:00 +0200
  [patch V3 25/32] kprobes: Cure hotplug lock ordering issues Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
    Re: [patch V3 25/32] kprobes: Cure hotplug lock ordering issues Masami Hiramatsu <mhiramat@kernel.org> - 2017-05-24 18:00 +0200
  [patch V3 03/32] cpu/hotplug: Provide  cpuhp_setup/remove_state[_nocalls]_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
  [patch V3 15/32] s390/kernel: Use stop_machine_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
    Re: [patch V3 15/32] s390/kernel: Use stop_machine_cpuslocked() Heiko Carstens <heiko.carstens@de.ibm.com> - 2017-05-24 13:00 +0200
  [patch V3 06/32] padata: Make padata_alloc() static Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
  [patch V3 07/32] padata: Avoid nested calls to cpus_read_lock() in  pcrypt_init_padata() Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:40 +0200
  [patch V3 13/32] perf/x86/intel/cqm: Use  cpuhp_setup_state_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:50 +0200
  [patch V3 11/32] hwtracing/coresight-etm3x: Use  cpuhp_setup_state_nocalls_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 10:50 +0200
  Re: [patch V3 00/32] cpu/hotplug: Convert get_online_cpus() to a  percpu_rwsem "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-24 18:30 +0200

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