linux.git/drivers/tty/sysrq.c, branch v5.18

Merge tag 'tty-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2021-11-04T16:09:37+00:00

Pull tty / serial driver updates from Greg KH:
 "Here is the big set of tty and serial driver updates for 5.16-rc1.

  Nothing major in here at all, just lots of tiny serial and tty driver
  updates for various reported things, and some good cleanups. These
  include:

   - more good tty api cleanups from Jiri

   - stm32 serial driver updates

   - softlockup fix for non-preempt systems under high serial load

   - rpmsg serial driver update

   - 8250 drivers updates and fixes

   - n_gsm line discipline fixes and updates as people are finally
     starting to use it.

  All of these have been in linux-next for a while now with no reported
  issues"

* tag 'tty-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (86 commits)
  tty: Fix extra "not" in TTY_DRIVER_REAL_RAW description
  serial: cpm_uart: Protect udbg definitions by CONFIG_SERIAL_CPM_CONSOLE
  tty: rpmsg: Define tty name via constant string literal
  tty: rpmsg: Add pr_fmt() to prefix messages
  tty: rpmsg: Use dev_err_probe() in ->probe()
  tty: rpmsg: Unify variable used to keep an error code
  tty: rpmsg: Assign returned id to a local variable
  serial: stm32: push DMA RX data before suspending
  serial: stm32: terminate / restart DMA transfer at suspend / resume
  serial: stm32: rework RX dma initialization and release
  serial: 8250_pci: Remove empty stub pci_quatech_exit()
  serial: 8250_pci: Replace custom pci_match_id() implementation
  serial: xilinx_uartps: Fix race condition causing stuck TX
  serial: sunzilog: Mark sunzilog_putchar() __maybe_unused
  Revert "tty: hvc: pass DMA capable memory to put_chars()"
  Revert "virtio-console: remove unnecessary kmemdup()"
  serial: 8250_pci: Replace dev_*() by pci_*() macros
  serial: 8250_pci: Get rid of redundant 'else' keyword
  serial: 8250_pci: Refactor the loop in pci_ite887x_init()
  tty: add rpmsg driver
  ...

workqueue: Introduce show_one_worker_pool and show_one_workqueue.

2021-10-20T16:19:03+00:00

Currently show_workqueue_state shows the state of all workqueues and of
all worker pools. In certain cases we may need to dump state of only a
specific workqueue or worker pool. For example in destroy_workqueue we
only need to show state of the workqueue which is getting destroyed.

So rename show_workqueue_state to show_all_workqueues(to signify it
dumps state of all busy workqueues) and divide it into more granular
functions (show_one_workqueue and show_one_worker_pool), that would show
states of individual workqueues and worker pools and can be used in
cases such as the one mentioned above.

Also, as mentioned earlier, make destroy_workqueue dump data pertaining
to only the workqueue that is being destroyed and make user(s) of
earlier interface(show_workqueue_state), use new interface
(show_all_workqueues).

Signed-off-by: Imran Khan 
Signed-off-by: Tejun Heo

tty/sysrq: More intuitive Shift handling

2021-10-10T13:19:43+00:00

Make Alt-SysRq-Shift- behave like Alt-Shift-SysRq-.

Acked-by: Pavel Machek 
Signed-off-by: Oskari Pirhonen 
Link: https://lore.kernel.org/r/YU/6SCmUr9qGkqBu@dj3ntoo
Signed-off-by: Greg Kroah-Hartman

tty: replace in_irq() with in_hardirq()

2021-08-16T17:01:52+00:00

Replace the obsolete and ambiguos macro in_irq() with new
macro in_hardirq().

Reviewed-by: Jiri Slaby 
Signed-off-by: Changbin Du 
Link: https://lore.kernel.org/r/20210814005033.2381-1-changbin.du@gmail.com
Signed-off-by: Greg Kroah-Hartman

tty/sysrq: Fix issues of code indent should use tabs

2021-04-10T08:33:00+00:00

Fix issues of code indent should use tabs, reported by checkpatch.pl.

Signed-off-by: Xiaofei Tan 
Link: https://lore.kernel.org/r/1617779210-51576-3-git-send-email-tanxiaofei@huawei.com
Signed-off-by: Greg Kroah-Hartman

tty/sysrq: Add a blank line after declarations

2021-04-10T08:33:00+00:00

Add a blank line after declarations, reported by checkpatch.pl.

Signed-off-by: Xiaofei Tan 
Link: https://lore.kernel.org/r/1617779210-51576-2-git-send-email-tanxiaofei@huawei.com
Signed-off-by: Greg Kroah-Hartman

tty/sysrq: Extend the sysrq_key_table to cover capital letters

2020-10-02T12:56:06+00:00

All slots in sysrq_key_table[] are either used, reserved or at least
commented with their intended use. This patch adds capital letter versions
available, which means adding 26 more entries.

For already existing SysRq operations the user presses Alt-SysRq-, and
for the newly added ones Alt-Shift-SysRq-.

Signed-off-by: Andrzej Pietrasiewicz 
Acked-by: Daniel Vetter 
Link: https://lore.kernel.org/r/20200818112825.6445-2-andrzej.p@collabora.com
Signed-off-by: Greg Kroah-Hartman

tty/sysrq: emergency_thaw_all does not depend on CONFIG_BLOCK

2020-06-24T15:16:02+00:00

We can also thaw non-block file systems.  Remove the CONFIG_BLOCK in
sysrq.c after making the prototype available unconditionally.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Bart Van Assche 
Reviewed-by: Greg Kroah-Hartman 
Signed-off-by: Jens Axboe

kernel: rename show_stack_loglvl() => show_stack()

2020-06-09T16:39:13+00:00

Now the last users of show_stack() got converted to use an explicit log
level, show_stack_loglvl() can drop it's redundant suffix and become once
again well known show_stack().

Signed-off-by: Dmitry Safonov 
Signed-off-by: Andrew Morton 
Link: http://lkml.kernel.org/r/20200418201944.482088-51-dima@arista.com
Signed-off-by: Linus Torvalds

sysrq: use show_stack_loglvl()

2020-06-09T16:39:12+00:00

Show the stack trace on a CPU with the same log level as "CPU%d" header.

Signed-off-by: Dmitry Safonov 
Signed-off-by: Andrew Morton 
Cc: Greg Kroah-Hartman 
Cc: Jiri Slaby 
Link: http://lkml.kernel.org/r/20200418201944.482088-45-dima@arista.com
Signed-off-by: Linus Torvalds