RE: [PATCH] x86: fix build in !CONFIG_KEXEC_CORE case
From: KY Srinivasan
Date: Mon Aug 17 2015 - 13:58:56 EST
> -----Original Message-----
> From: Vitaly Kuznetsov [mailto:vkuznets@xxxxxxxxxx]
> Sent: Tuesday, August 11, 2015 6:36 AM
> To: x86@xxxxxxxxxx
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>; Ingo Molnar
> <mingo@xxxxxxxxxx>; H. Peter Anvin <hpa@xxxxxxxxx>; linux-
> kernel@xxxxxxxxxxxxxxx; Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>; KY
> Srinivasan <kys@xxxxxxxxxxxxx>; Jim Davis <jim.epost@xxxxxxxxx>; linux-
> next <linux-next@xxxxxxxxxxxxxxx>
> Subject: [PATCH] x86: fix build in !CONFIG_KEXEC_CORE case
>
> Recent changes in Hyper-V driver ("Drivers: hv: vmbus: add special crash
> handler") broke the build when CONFIG_KEXEC_CORE is not set. These
> changes, however, only reveal the previously existent issue: when
> CONFIG_KEXEC_CORE is not defined kernel/kexec.c is not being included in
> the build and native_machine_crash_shutdown() defined in asm/reboot.h
> has
> no implementation.
>
> Reported-by: Jim Davis <jim.epost@xxxxxxxxx>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
> ---
> arch/x86/include/asm/reboot.h | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/reboot.h b/arch/x86/include/asm/reboot.h
> index a82c4f1..a6c1124 100644
> --- a/arch/x86/include/asm/reboot.h
> +++ b/arch/x86/include/asm/reboot.h
> @@ -16,8 +16,15 @@ struct machine_ops {
>
> extern struct machine_ops machine_ops;
>
> -void native_machine_crash_shutdown(struct pt_regs *regs);
> void native_machine_shutdown(void);
> +#ifdef CONFIG_KEXEC_CORE
> +void native_machine_crash_shutdown(struct pt_regs *regs);
> +#else
> +static inline void native_machine_crash_shutdown(struct pt_regs *regs)
> +{
> + native_machine_shutdown();
> +}
> +#endif
> void __noreturn machine_real_restart(unsigned int type);
> /* These must match dispatch in arch/x86/realmore/rm/reboot.S */
> #define MRR_BIOS 0
> --
> 2.4.3
This patch fixes a build issue; please apply.
Regards,
K. Y
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