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Dimitri John Ledkov c840d62647 riscv: set default pm_power_off to NULL 
commit f2928e224d upstream.

Set pm_power_off to NULL like on all other architectures, check if it
is set in machine_halt() and machine_power_off() and fallback to
default_power_off if no other power driver got registered.

This brings riscv architecture inline with all other architectures,
and allows to reuse exiting power drivers unmodified.

Kernels without legacy SBI v0.1 extensions (CONFIG_RISCV_SBI_V01 is
not set), do not set pm_power_off to sbi_shutdown(). There is no
support for SBI v0.3 system reset extension either. This prevents
using gpio_poweroff on SiFive HiFive Unmatched.

Tested on SiFive HiFive unmatched, with a dtb specifying gpio-poweroff
node and kernel complied without CONFIG_RISCV_SBI_V01.

BugLink: https://bugs.launchpad.net/bugs/1942806
Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Ron Economos <w6rz@comcast.net>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-08-17 14:22:49 +02:00
arch riscv: set default pm_power_off to NULL 2022-08-17 14:22:49 +02:00
block block: fix default IO priority handling again 2022-08-11 13:07:50 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: memneq - move into lib/ 2022-06-22 14:22:03 +02:00
Documentation x86/speculation: Add RSB VM Exit protections 2022-08-11 13:07:54 +02:00
drivers HID: wacom: Don't register pad_input for touch switch 2022-08-17 14:22:47 +02:00
fs lockd: detect and reject lock arguments that overflow 2022-08-17 14:22:47 +02:00
include lockd: detect and reject lock arguments that overflow 2022-08-17 14:22:47 +02:00
init Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug 2022-06-09 10:23:26 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:23:10 +02:00
kernel locking/rwsem: Allow slowpath writer to ignore handoff bit if not set by first waiter 2022-08-03 12:03:56 +02:00
lib ida: don't use BUG_ON() for debugging 2022-07-12 16:35:18 +02:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm page_alloc: fix invalid watermark check on a negative value 2022-08-03 12:03:55 +02:00
net sctp: leave the err path free in sctp_stream_init to sctp_stream_free 2022-08-03 12:03:54 +02:00
samples samples/landlock: Format with clang-format 2022-06-09 10:23:23 +02:00
scripts x86/extable: Rework the exception table mechanics 2022-07-29 17:25:25 +02:00
security lockdown: Fix kexec lockdown bypass with ima policy 2022-07-29 17:25:05 +02:00
sound ALSA: hda/realtek: Add quirk for HP Spectre x360 15-eb0xxx 2022-08-17 14:22:46 +02:00
tools x86/speculation: Add RSB VM Exit protections 2022-08-11 13:07:54 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: Don't null dereference ops->destroy 2022-07-29 17:25:24 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Input: goodix - add a goodix.h header file 2022-07-12 16:34:51 +02:00
Makefile Makefile: link with -z noexecstack --no-warn-rwx-segments 2022-08-17 14:22:44 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.