linux-kernel - Re: [PATCH 05/11] kernel/acpi: move acpi_video

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Date:   Tue, 22 Feb 2022 20:26:39 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     tangmeng <tangmeng@...ontech.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, nizhen@...ontech.com,
        zhanglianjie@...ontech.com, nixiaoming@...wei.com,
        Linux PM <linux-pm@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH 05/11] kernel/acpi: move acpi_video_flags sysctl to its
 own file

On Tue, Feb 22, 2022 at 2:36 AM tangmeng <tangmeng@...ontech.com> wrote:
>
> On 2022/2/22 00:08, Rafael J. Wysocki wrote:
> > On Sun, Feb 20, 2022 at 7:01 AM tangmeng <tangmeng@...ontech.com> wrote:
> >>
> >> kernel/sysctl.c is a kitchen sink where everyone leaves their dirty
> >> dishes, this makes it very difficult to maintain.
> >>
> >> To help with this maintenance let's start by moving sysctls to places
> >> where they actually belong.  The proc sysctl maintainers do not want to
> >> know what sysctl knobs you wish to add for your own piece of code, we
> >> just care about the core logic.
> >>
> >> All filesystem syctls now get reviewed by fs folks. This commit
> >> follows the commit of fs, move the acpi_video_flags sysctl to its
> >> own file, arch/x86/kernel/acpi/sleep.c.
> >>
> >> Signed-off-by: tangmeng <tangmeng@...ontech.com>
> >
> > Do you want me to take this or does it depend on the rest of the series?
> >
>
> All current commits that move sysctl to its own file will be queued on
> to the new sysctl-next, I used that tree for further sysctl changes.
>
> git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git sysctl-next
>
> So, it depend on the rest of the series. And my series of commits need
> to be merged into the sysctl-next branch first together.

OK, so please feel free to add

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

to this patch.

> >> ---
> >>   arch/x86/kernel/acpi/sleep.c | 21 ++++++++++++++++++++-
> >>   include/linux/acpi.h         |  1 -
> >>   kernel/sysctl.c              |  9 ---------
> >>   3 files changed, 20 insertions(+), 11 deletions(-)
> >>
> >> diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
> >> index 1e97f944b47d..256f3c065605 100644
> >> --- a/arch/x86/kernel/acpi/sleep.c
> >> +++ b/arch/x86/kernel/acpi/sleep.c
> >> @@ -20,7 +20,26 @@
> >>   #include "../../realmode/rm/wakeup.h"
> >>   #include "sleep.h"
> >>
> >> -unsigned long acpi_realmode_flags;
> >> +static unsigned long acpi_realmode_flags;
> >> +#ifdef CONFIG_SYSCTL
> >> +static struct ctl_table kern_acpi_table[] = {
> >> +       {
> >> +               .procname       = "acpi_video_flags",
> >> +               .data           = &acpi_realmode_flags,
> >> +               .maxlen         = sizeof(unsigned long),
> >> +               .mode           = 0644,
> >> +               .proc_handler   = proc_doulongvec_minmax,
> >> +       },
> >> +       { }
> >> +};
> >> +
> >> +static __init int kernel_acpi_sysctls_init(void)
> >> +{
> >> +       register_sysctl_init("kernel", kern_acpi_table);
> >> +       return 0;
> >> +}
> >> +late_initcall(kernel_acpi_sysctls_init);
> >> +#endif /* CONFIG_SYSCTL */
> >>
> >>   #if defined(CONFIG_SMP) && defined(CONFIG_64BIT)
> >>   static char temp_stack[4096];
> >> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> >> index 6274758648e3..4f1d9cf579f5 100644
> >> --- a/include/linux/acpi.h
> >> +++ b/include/linux/acpi.h
> >> @@ -349,7 +349,6 @@ static inline bool acpi_sci_irq_valid(void)
> >>   }
> >>
> >>   extern int sbf_port;
> >> -extern unsigned long acpi_realmode_flags;
> >>
> >>   int acpi_register_gsi (struct device *dev, u32 gsi, int triggering, int polarity);
> >>   int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
> >> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> >> index e6d99bbf9a9d..62499e3207aa 100644
> >> --- a/kernel/sysctl.c
> >> +++ b/kernel/sysctl.c
> >> @@ -1973,15 +1973,6 @@ static struct ctl_table kern_table[] = {
> >>                  .proc_handler   = proc_dointvec,
> >>          },
> >>   #endif
> >> -#if    defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
> >> -       {
> >> -               .procname       = "acpi_video_flags",
> >> -               .data           = &acpi_realmode_flags,
> >> -               .maxlen         = sizeof (unsigned long),
> >> -               .mode           = 0644,
> >> -               .proc_handler   = proc_doulongvec_minmax,
> >> -       },
> >> -#endif
> >>   #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
> >>          {
> >>                  .procname       = "ignore-unaligned-usertrap",
> >> --
> >> 2.20.1
> >>
> >>
> >>
> >
>
>