[V3 0/3] Fixed dump_backtrace() when task running on another cpu

[Wang Qing <wangqing@vivo.com>]

We cannot get FP and PC when the task is running on another CPU,
task->thread.cpu_context is the last time the task was switched out,
it's better to give a reminder than to provide wrong information
for example when Task blocked in spinlock/interrupt/busy loop.

The task_running() should be renamed to task_running_on_rq()
like the naming of task_running_on_cpu(), this is what it
originally mean.

Add task_running() no rq required.

V2:
- Add task_running_oncpu()
v3:
- Renamed task_running() to task_running_on_rq()
- Renamed task_running_oncpu() to task_running()

Wang Qing (3):
  ARM64:fixed dump_backtrace() when task running on another cpu
  sched:add task_running()
  sched:rename task_running() and to task_running_on_rq

 arch/arm64/kernel/traps.c |  7 +++++++
 include/linux/sched.h     | 10 ++++++++++
 kernel/sched/core.c       | 14 +++++++-------
 kernel/sched/deadline.c   |  6 +++---
 kernel/sched/fair.c       |  2 +-
 kernel/sched/rt.c         |  6 +++---
 kernel/sched/sched.h      |  2 +-
 7 files changed, 32 insertions(+), 15 deletions(-)

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2.7.4