linux.git/arch/nds32/kernel, branch v5.15

ftrace/nds32: Update the proto for ftrace_trace_function to match ftrace_stub

2021-10-27T17:00:17+00:00

The ftrace callback prototype was changed to pass a special ftrace_regs
instead of pt_regs as the last parameter, but the static ftrace for nds32
missed updating ftrace_trace_function and this caused a warning when
compared to ftrace_stub:

../arch/nds32/kernel/ftrace.c: In function '_mcount':
../arch/nds32/kernel/ftrace.c:24:35: error: comparison of distinct pointer types lacks a cast [-Werror]
   24 |         if (ftrace_trace_function != ftrace_stub)
      |                                   ^~

Link: https://lore.kernel.org/all/20211027055554.19372-1-rdunlap@infradead.org/
Link: https://lkml.kernel.org/r/20211027125101.33449969@gandalf.local.home

Cc: Ingo Molnar 
Cc: Andrew Morton 
Cc: Nick Hu 
Cc: Greentime Hu 
Cc: Vincent Chen 
Cc: Masami Hiramatsu 
Cc: Peter Zijlstra 
Cc: stable@vger.kernel.org
Fixes: d19ad0775dcd6 ("ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs")
Reported-by: Randy Dunlap 
Signed-off-by: Steven Rostedt (VMware)

nds32/setup: remove unused memblock_region variable in setup_memory()

2021-09-09T01:45:53+00:00

kernel test robot reports unused variable warning:

   arch/nds32/kernel/setup.c:247:26: warning: Unused variable: region
   [unusedVariable]
    struct memblock_region *region;
                            ^

Remove the unused variable.

Link: https://lkml.kernel.org/r/20210712125218.28951-1-rppt@kernel.org
Signed-off-by: Mike Rapoport 
Reported-by: kernel test robot 
Reviewed-by: Guenter Roeck 
Tested-by: Guenter Roeck 
Cc: Greentime Hu 
Cc: Nick Hu 
Cc: Vincent Chen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

trap: cleanup trap_init()

2021-09-08T18:50:27+00:00

There are some empty trap_init() definitions in different ARCHs, Introduce
a new weak trap_init() function to clean them up.

Link: https://lkml.kernel.org/r/20210812123602.76356-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang 
Acked-by: Russell King (Oracle) 	[arm32]
Acked-by: Vineet Gupta						[arc]
Acked-by: Michael Ellerman 			[powerpc]
Cc: Yoshinori Sato 
Cc: Ley Foon Tan 
Cc: Jonas Bonn 
Cc: Stefan Kristiansson 
Cc: Stafford Horne 
Cc: James E.J. Bottomley 
Cc: Helge Deller 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Paul Walmsley 
Cc: Jeff Dike 
Cc: Richard Weinberger 
Cc: Anton Ivanov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

nds32: convert to setup_initial_init_mm()

2021-07-08T18:48:21+00:00

Use setup_initial_init_mm() helper to simplify code.

Link: https://lkml.kernel.org/r/20210608083418.137226-9-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang 
Cc: Nick Hu 
Cc: Greentime Hu 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sched: Introduce task_is_running()

2021-06-18T09:43:07+00:00

Replace a bunch of 'p->state == TASK_RUNNING' with a new helper:
task_is_running(p).

Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Davidlohr Bueso 
Acked-by: Geert Uytterhoeven 
Acked-by: Will Deacon 
Link: https://lore.kernel.org/r/20210611082838.222401495@infradead.org

tracing: Fix various typos in comments

2021-03-23T18:08:18+00:00

Fix ~59 single-word typos in the tracing code comments, and fix
the grammar in a handful of places.

Link: https://lore.kernel.org/r/20210322224546.GA1981273@gmail.com
Link: https://lkml.kernel.org/r/20210323174935.GA4176821@gmail.com

Reviewed-by: Randy Dunlap 
Signed-off-by: Ingo Molnar 
Signed-off-by: Steven Rostedt (VMware)

Merge tag 'io_uring-worker.v3-2021-02-25' of git://git.kernel.dk/linux-block

2021-02-27T16:29:02+00:00

Pull io_uring thread rewrite from Jens Axboe:
 "This converts the io-wq workers to be forked off the tasks in question
  instead of being kernel threads that assume various bits of the
  original task identity.

  This kills > 400 lines of code from io_uring/io-wq, and it's the worst
  part of the code. We've had several bugs in this area, and the worry
  is always that we could be missing some pieces for file types doing
  unusual things (recent /dev/tty example comes to mind, userfaultfd
  reads installing file descriptors is another fun one... - both of
  which need special handling, and I bet it's not the last weird oddity
  we'll find).

  With these identical workers, we can have full confidence that we're
  never missing anything. That, in itself, is a huge win. Outside of
  that, it's also more efficient since we're not wasting space and code
  on tracking state, or switching between different states.

  I'm sure we're going to find little things to patch up after this
  series, but testing has been pretty thorough, from the usual
  regression suite to production. Any issue that may crop up should be
  manageable.

  There's also a nice series of further reductions we can do on top of
  this, but I wanted to get the meat of it out sooner rather than later.
  The general worry here isn't that it's fundamentally broken. Most of
  the little issues we've found over the last week have been related to
  just changes in how thread startup/exit is done, since that's the main
  difference between using kthreads and these kinds of threads. In fact,
  if all goes according to plan, I want to get this into the 5.10 and
  5.11 stable branches as well.

  That said, the changes outside of io_uring/io-wq are:

   - arch setup, simple one-liner to each arch copy_thread()
     implementation.

   - Removal of net and proc restrictions for io_uring, they are no
     longer needed or useful"

* tag 'io_uring-worker.v3-2021-02-25' of git://git.kernel.dk/linux-block: (30 commits)
  io-wq: remove now unused IO_WQ_BIT_ERROR
  io_uring: fix SQPOLL thread handling over exec
  io-wq: improve manager/worker handling over exec
  io_uring: ensure SQPOLL startup is triggered before error shutdown
  io-wq: make buffered file write hashed work map per-ctx
  io-wq: fix race around io_worker grabbing
  io-wq: fix races around manager/worker creation and task exit
  io_uring: ensure io-wq context is always destroyed for tasks
  arch: ensure parisc/powerpc handle PF_IO_WORKER in copy_thread()
  io_uring: cleanup ->user usage
  io-wq: remove nr_process accounting
  io_uring: flag new native workers with IORING_FEAT_NATIVE_WORKERS
  net: remove cmsg restriction from io_uring based send/recvmsg calls
  Revert "proc: don't allow async path resolution of /proc/self components"
  Revert "proc: don't allow async path resolution of /proc/thread-self components"
  io_uring: move SQPOLL thread io-wq forked worker
  io-wq: make io_wq_fork_thread() available to other users
  io-wq: only remove worker from free_list, if it was there
  io_uring: remove io_identity
  io_uring: remove any grabbing of context
  ...

nds32: Fix bogus reference to

2021-02-25T06:31:49+00:00

Andestech(nds32) never had .

Signed-off-by: Geert Uytterhoeven 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu

nds32: use get_kernel_nofault in dump_mem

2021-02-25T06:31:49+00:00

Use the proper get_kernel_nofault helper to access an unsafe kernel
pointer without faulting instead of playing with set_fs and get_user.

Signed-off-by: Christoph Hellwig 
Acked-by: Nick Hu 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu

nds32: remove dump_instr

2021-02-25T06:31:49+00:00

dump_inst has a return before actually doing anything, so just drop the
whole thing.

Signed-off-by: Christoph Hellwig 
Acked-by: Nick Hu 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu