Re: [PATCH] kexec: Fix CONFIG_SMP=n compilation V2 (ia64)

Jay Lan
2007-02-05T18:14:37Z

Magnus Damm wrote:
> kexec: Fix CONFIG_SMP=n compilation V2 (ia64)
>
> Kexec support for 2.6.20 on ia64 does not build properly using a config
> made up by CONFIG_SMP=n and CONFIG_HOTPLUG_CPU=n:
>
> CC arch/ia64/kernel/machine_kexec.o
> arch/ia64/kernel/machine_kexec.c: In function `machine_shutdown':
> arch/ia64/kernel/machine_kexec.c:77: warning: implicit declaration of function `cpu_down'
> AS arch/ia64/kernel/relocate_kernel.o
> CC arch/ia64/kernel/crash.o
> arch/ia64/kernel/crash.c: In function `kdump_cpu_freeze':
> arch/ia64/kernel/crash.c:139: warning: implicit declaration of function `ia64_jump_to_sal'
> arch/ia64/kernel/crash.c:139: error: `sal_boot_rendez_state' undeclared (first use in this function)
> arch/ia64/kernel/crash.c:139: error: (Each undeclared identifier is reported only once
> arch/ia64/kernel/crash.c:139: error: for each function it appears in.)
> arch/ia64/kernel/crash.c: At top level:
> arch/ia64/kernel/crash.c:84: warning: 'kdump_wait_cpu_freeze' defined but not used
> make[1]: *** [arch/ia64/kernel/crash.o] Error 1
> make: *** [arch/ia64/kernel] Error 2
>
> Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
> ---

Looks good to me also.

Acked-by: Jay Lan <jlan@sgi.com>

> machine_kexec.c
> Applies on top of 2.6.20.
>
> arch/ia64/kernel/crash.c | 11 +++++++----
> arch/ia64/kernel/machine_kexec.c | 2 ++
> 2 files changed, 9 insertions(+), 4 deletions(-)
>
> --- 0002/arch/ia64/kernel/crash.c
> +++ work/arch/ia64/kernel/crash.c 2007-02-02 20:31:18.000000000 +0900
> @@ -79,6 +79,7 @@ crash_save_this_cpu()
> final_note(buf);
> }
>
> +#ifdef CONFIG_SMP
> static int
> kdump_wait_cpu_freeze(void)
> {
> @@ -91,6 +92,7 @@ kdump_wait_cpu_freeze(void)
> }
> return 1;
> }
> +#endif
>
> void
> machine_crash_shutdown(struct pt_regs *pt)
> @@ -132,11 +134,12 @@ kdump_cpu_freeze(struct unw_frame_info *
> atomic_inc(&kdump_cpu_freezed);
> kdump_status[cpuid] = 1;
> mb();
> - if (cpuid = 0) {
> - for (;;)
> - cpu_relax();
> - } else
> +#ifdef CONFIG_HOTPLUG_CPU
> + if (cpuid != 0)
> ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
> +#endif
> + for (;;)
> + cpu_relax();
> }
>
> static int
> --- 0002/arch/ia64/kernel/machine_kexec.c
> +++ work/arch/ia64/kernel/machine_kexec.c 2007-02-02 20:56:24.000000000 +0900
> @@ -70,12 +70,14 @@ void machine_kexec_cleanup(struct kimage
>
> void machine_shutdown(void)
> {
> +#ifdef CONFIG_HOTPLUG_CPU
> int cpu;
>
> for_each_online_cpu(cpu) {
> if (cpu != smp_processor_id())
> cpu_down(cpu);
> }
> +#endif
> kexec_disable_iosapic();
> }
>
> -
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