This is a simple fast-fwd series, apply and boot tested on the
v5.2/standard/preempt-rt/base after merging v5.2.40

The commits are as follows from linux-rt-devel on v5.2 branch:

linux-rt-devel$ git log --oneline --reverse --no-merges ^v5.2.21-rt12~ 
linux-5.2.y-rt
89a5ea10a640 v5.2.21-rt12
adfa969d4cfc sched: migrate_enable: Use select_fallback_rq()
425c5b38779a sched: Lazy migrate_disable processing
6b39a1fa8c53 sched: migrate_enable: Use stop_one_cpu_nowait()
d64b599394a1 Revert "cpufreq: drop K8's driver from beeing selected"
247074c44d8c Revert "ARM: Initialize split page table locks for vector page"
c94eace2b017 v5.2.21-rt13
448d96889a69 printk: hack out emergency loglevel usage
eb46d70e4455 x86/fpu: Don't cache access to fpu_fpregs_owner_ctx
84440022a0e1 locking: Make spinlock_t and rwlock_t a RCU section on RT
22230d9b5068 powerpc: Fixup compile and lazy-preempt
a61d1977f692 sched/core: migrate_enable() must access takedown_cpu_task on 
!HOTPLUG_CPU
eccdce6cb526 v5.2.21-rt14
af3c1c5fdf17 lib/smp_processor_id: Adjust check_preemption_disabled()
140d7f54a5ff sched: migrate_enable: Busy loop until the migration request is 
completed
18bc3d60b26c v5.2.21-rt15

Note that eb46d70e4455 x86/fpu... was backported from mainline into the
v5.2.22 release, so it is present, but just not a part of this series.

The linux-rt-devel can be found at:
 git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git

Paul.
---

Daniel Wagner (1):
  lib/smp_processor_id: Adjust check_preemption_disabled()

John Ogness (1):
  printk: hack out emergency loglevel usage

Scott Wood (3):
  sched: migrate_enable: Use select_fallback_rq()
  sched: Lazy migrate_disable processing
  sched: migrate_enable: Use stop_one_cpu_nowait()

Sebastian Andrzej Siewior (9):
  Revert "cpufreq: drop K8's driver from beeing selected"
  Revert "ARM: Initialize split page table locks for vector page"
  v5.2.21-rt13
  locking: Make spinlock_t and rwlock_t a RCU section on RT
  powerpc: Fixup compile and lazy-preempt
  sched/core: migrate_enable() must access takedown_cpu_task on
    !HOTPLUG_CPU
  v5.2.21-rt14
  sched: migrate_enable: Busy loop until the migration request is
    completed
  v5.2.21-rt15

 arch/arm/kernel/process.c      |  24 -----
 arch/powerpc/kernel/entry_32.S |   4 +-
 drivers/cpufreq/Kconfig.x86    |   2 +-
 include/linux/cpu.h            |   4 -
 include/linux/preempt.h        |   4 +-
 include/linux/sched.h          |  11 +--
 include/linux/stop_machine.h   |   2 +
 init/init_task.c               |   4 +
 kernel/cpu.c                   | 105 +++++++++-------------
 kernel/locking/rtmutex.c       |   6 ++
 kernel/locking/rwlock-rt.c     |   6 ++
 kernel/printk/printk.c         |  13 +--
 kernel/sched/core.c            | 198 +++++++++++++++++------------------------
 kernel/sched/sched.h           |   4 +
 kernel/stop_machine.c          |   7 +-
 lib/smp_processor_id.c         |   5 ++
 localversion-rt                |   2 +-
 17 files changed, 171 insertions(+), 230 deletions(-)

-- 
2.7.4

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