From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Osipenko Date: Sun, 28 Nov 2021 21:06:57 +0000 Subject: Re: [PATCH v4 18/25] x86: Use do_kernel_power_off() Message-Id: <3082ba7a-f8f6-b2d9-5ae3-ec639b1a6bee@gmail.com> List-Id: References: <20211126180101.27818-1-digetx@gmail.com> <20211126180101.27818-19-digetx@gmail.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: =?UTF-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= Cc: Thierry Reding , Jonathan Hunter , Russell King , Catalin Marinas , Will Deacon , Guo Ren , Geert Uytterhoeven , Greg Ungerer , Joshua Thompson , Thomas Bogendoerfer , Sebastian Reichel , Linus Walleij , Philipp Zabel , Greentime Hu , Vincent Chen , "James E.J. Bottomley" , Helge Deller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Yoshinori Sato , Rich Felker , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , "Rafael J. Wysocki" , Len Brown , Santosh Shilimkar , Krzysztof Kozlowski , Liam Girdwood , Mark Brown , Pavel Machek , Lee Jones , Andrew Morton , Guenter Roeck , Daniel Lezcano , Andy Shevchenko , Ulf Hansson , alankao@andestech.com, "K . C . Kuen-Chern Lin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, xen-devel@lists.xenproject.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org 28.11.2021 04:15, Michał Mirosław пишет: > On Fri, Nov 26, 2021 at 09:00:54PM +0300, Dmitry Osipenko wrote: >> Kernel now supports chained power-off handlers. Use do_kernel_power_off() >> that invokes chained power-off handlers. It also invokes legacy >> pm_power_off() for now, which will be removed once all drivers will >> be converted to the new power-off API. >> >> Signed-off-by: Dmitry Osipenko >> --- >> arch/x86/kernel/reboot.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c >> index 0a40df66a40d..cd7d9416d81a 100644 >> --- a/arch/x86/kernel/reboot.c >> +++ b/arch/x86/kernel/reboot.c >> @@ -747,10 +747,10 @@ static void native_machine_halt(void) >> >> static void native_machine_power_off(void) >> { >> - if (pm_power_off) { >> + if (kernel_can_power_off()) { >> if (!reboot_force) >> machine_shutdown(); >> - pm_power_off(); >> + do_kernel_power_off(); >> } > > Judging from an old commit from 2006 [1], this can be rewritten as: > > if (!reboot_force && kernel_can_power_off()) > machine_shutdown(); > do_kernel_power_off(); > > And maybe later reworked so it doesn't need kernel_can_power_off(). > > [1] http://lkml.iu.edu/hypermail//linux/kernel/0511.3/0681.html It could be rewritten like you're suggesting, but I'd prefer to keep the old variant, for clarity.