[PATCH 2/3] [PATCH 2/3] kexec: split kexec_load syscall from kexec core code
geert at linux-m68k.org
Tue Jul 14 01:50:54 PDT 2015
On Tue, Jul 14, 2015 at 10:46 AM, Dave Young <dyoung at redhat.com> wrote:
>> > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
>> > index 1c50210..20c48b3 100644
>> > --- a/arch/arm/Kconfig
>> > +++ b/arch/arm/Kconfig
>> > @@ -2001,10 +2001,14 @@ config XIP_PHYS_ADDR
>> > be linked for and stored to. This address is dependent on your
>> > own flash usage.
>> > +config KEXEC_CORE
>> > + bool
>> > +
>> > config KEXEC
>> > bool "Kexec system call (EXPERIMENTAL)"
>> > depends on (!SMP || PM_SLEEP_SMP)
>> > depends on !CPU_V7M
>> > + select KEXEC_CORE
>> > help
>> > kexec is a system call that implements the ability to shutdown your
>> > current kernel, and to start another kernel. It is like a reboot
>> As this KEXEC_CORE is appearing in all arch/*/Kconfig files, I think it's
>> time to add an ARCH_HAS_KEXEC symbol (to a common Kconfig file),
>> and let arch/*/Kconfig select that if the architecture has kexec support.
>> Then KEXEC and KEXEC_CORE can live in the common Kconfig file,
>> without the need to duplicate it.
> I'm not sure I understand your idea well, do you means like
> in arch/Kconfig add ARCH_HAS_KEXEC which depends on KEXEC_CORE?
No, ARCH_HAS_KEXEC and all other KEXEC config options in arch/Kconfig.
All other KEXEC config options should depend on ARCH_HAS_KEXEC,
which can be selected by architectures that support kexec.
> How about simply move below chunk to arch/Kconfig instead of introducing
> another ARCH_HAS_KEXEC:
> config KEXEC_CORE
Not all architectures support kexec, hence my proposed dependency on
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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