linux-toradex.git/kernel/power/poweroff.c, branch v6.19

tty: sysrq: switch sysrq handlers from int to u8

2023-07-25T17:21:03+00:00

The passed parameter to sysrq handlers is a key (a character). So change
the type from 'int' to 'u8'. Let it specifically be 'u8' for two
reasons:
* unsigned: unsigned values come from the upper layers (devices) and the
  tty layer assumes unsigned on most places, and
* 8-bit: as that what's supposed to be one day in all the layers built
  on the top of tty. (Currently, we use mostly 'unsigned char' and
  somewhere still only 'char'. (But that also translates to the former
  thanks to -funsigned-char.))

Signed-off-by: Jiri Slaby (SUSE) 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Matt Turner 
Cc: Huacai Chen 
Cc: WANG Xuerui 
Cc: Thomas Bogendoerfer 
Cc: Michael Ellerman 
Cc: Nicholas Piggin 
Cc: Christophe Leroy 
Cc: "David S. Miller" 
Cc: Maarten Lankhorst 
Cc: Maxime Ripard 
Cc: Thomas Zimmermann 
Cc: David Airlie 
Cc: Daniel Vetter 
Cc: Jason Wessel 
Cc: Daniel Thompson 
Cc: Douglas Anderson 
Cc: "Rafael J. Wysocki" 
Cc: Len Brown 
Cc: Pavel Machek 
Cc: "Paul E. McKenney" 
Cc: Frederic Weisbecker 
Cc: Neeraj Upadhyay 
Cc: Joel Fernandes 
Cc: Josh Triplett 
Cc: Boqun Feng 
Cc: Steven Rostedt 
Cc: Mathieu Desnoyers 
Cc: Lai Jiangshan 
Cc: Zqiang 
Acked-by: Thomas Zimmermann  # DRM
Acked-by: WANG Xuerui  # loongarch
Acked-by: Paul E. McKenney 
Acked-by: Daniel Thompson 
Link: https://lore.kernel.org/r/20230712081811.29004-3-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman

kernel/power: constify sysrq_key_op

2020-05-15T12:53:20+00:00

With earlier commits, the API no longer discards the const-ness of the
sysrq_key_op. As such we can add the notation.

Cc: Greg Kroah-Hartman 
Cc: Jiri Slaby 
Cc: linux-kernel@vger.kernel.org
Cc: "Rafael J. Wysocki" 
Cc: Len Brown 
Cc: linux-pm@vger.kernel.org
Acked-by: Rafael J. Wysocki 
Signed-off-by: Emil Velikov 
Link: https://lore.kernel.org/r/20200513214351.2138580-10-emil.l.velikov@gmail.com
Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248

2019-06-19T15:09:08+00:00

Based on 1 normalized pattern(s):

  this file is released under the gpl v2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 3 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Reviewed-by: Armijn Hemel 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190602204655.103854853@linutronix.de
Signed-off-by: Greg Kroah-Hartman

power/sysrq: fix inconstistent help message of sysrq key

2013-05-01T00:04:10+00:00

Currently help message of /proc/sysrq-trigger highlight its
upper-case characters, like below:

      SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E)
      memory-full-oom-kill(F) kill-all-tasks(I) ...

this would confuse user trigger sysrq by upper-case character, which is
inconsistent with the real lower-case character registed key.

This inconsistent help message will also lead more confused when
26 upper-case letters put into use in future.

This patch fix power off sysrq key: "poweroff(o)"

Signed-off-by: zhangwei(Jovi) 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

properly __init-annotate pm_sysrq_init()

2012-09-10T19:21:58+00:00

This is used only as argument to subsys_initcall().

Signed-off-by: Jan Beulich 
Signed-off-by: Rafael J. Wysocki

Input: sysrq - drop tty argument from sysrq ops handlers

2010-08-20T05:07:06+00:00

Noone is using tty argument so let's get rid of it.

Acked-by: Alan Cox 
Acked-by: Jason Wessel 
Acked-by: Greg Kroah-Hartman 
Signed-off-by: Dmitry Torokhov

trivial: kernel/power/poweroff.c: whitespace fix

2009-06-12T16:01:46+00:00

Fix coding style whitespace fixes. Patch compile tested
Before :-
total: 1 errors, 0 warnings, 46 lines checked
After
total: 0 errors, 0 warnings, 46 lines checked

Before :-
  text	   data	    bss	    dec	    hex	filename
    107	     48	      0	    155	     9b	kernel/power/poweroff.o
After
   text	   data	    bss	    dec	    hex	filename
    107	     48	      0	    155	     9b	kernel/power/poweroff.o

Signed-off-by: Manish Katiyar 
Signed-off-by: Jiri Kosina

cpumask: convert rest of files in kernel/

2008-12-31T23:42:28+00:00

Impact: Reduce stack usage, use new cpumask API.

Mainly changing cpumask_t to 'struct cpumask' and similar simple API
conversion.  Two conversions worth mentioning:

1) we use cpumask_any_but to avoid a temporary in kernel/softlockup.c,
2) Use cpumask_var_t in taskstats_user_cmd().

Signed-off-by: Rusty Russell 
Signed-off-by: Mike Travis 
Cc: Balbir Singh 
Cc: Ingo Molnar

pm: schedule sysrq poweroff on boot cpu

2008-07-24T17:47:24+00:00

schedule sysrq poweroff on boot cpu.

sysrq poweroff needs to disable nonboot cpus, and we need to run this on boot
cpu to avoid any recursion.  http://bugzilla.kernel.org/show_bug.cgi?id=10897

[kosaki.motohiro@jp.fujitsu.com: build fix]
Signed-off-by: Zhang Rui 
Tested-by: Rus 
Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

WorkStruct: Pass the work_struct pointer instead of context data

2006-11-22T14:55:48+00:00

Pass the work_struct pointer to the work function rather than context data.
The work function can use container_of() to work out the data.

For the cases where the container of the work_struct may go away the moment the
pending bit is cleared, it is made possible to defer the release of the
structure by deferring the clearing of the pending bit.

To make this work, an extra flag is introduced into the management side of the
work_struct.  This governs auto-release of the structure upon execution.

Ordinarily, the work queue executor would release the work_struct for further
scheduling or deallocation by clearing the pending bit prior to jumping to the
work function.  This means that, unless the driver makes some guarantee itself
that the work_struct won't go away, the work function may not access anything
else in the work_struct or its container lest they be deallocated..  This is a
problem if the auxiliary data is taken away (as done by the last patch).

However, if the pending bit is *not* cleared before jumping to the work
function, then the work function *may* access the work_struct and its container
with no problems.  But then the work function must itself release the
work_struct by calling work_release().

In most cases, automatic release is fine, so this is the default.  Special
initiators exist for the non-auto-release case (ending in _NAR).


Signed-Off-By: David Howells