linux-kernel - Re: [PATCH] powerpc/powernv: Fix build error when CONFIG

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Date:	Tue, 20 May 2014 16:01:50 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	"Shreyas B. Prabhu" <shreyas@...ux.vnet.ibm.com>
CC:	linuxppc-dev@...ts.ozlabs.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/powernv: Fix build error when CONFIG_SMP=n

On 05/20/2014 03:25 PM, Shreyas B. Prabhu wrote:
> Fix the following build error when compiled with CONFIG_SMP=n
> arch/powerpc/platforms/powernv/setup.c: In function ‘pnv_kexec_wait_secondaries_down’:
> arch/powerpc/platforms/powernv/setup.c:179:4: error: implicit declaration of function ‘get_hard_smp_processor_id’ [-Werror=implicit-function-declaration]
>     rc = opal_query_cpu_status(get_hard_smp_processor_id(i),
> 
> The usage of get_hard_smp_processor_id() needs the declaration from <asm/smp.h>.
> The file setup.c includes <linux/sched.h>, which in-turn includes <linux/smp.h>.
> However, <linux/smp.h> includes <asm/smp.h> only on SMP configs and hence UP
> builds fail. Fix this by directly including <asm/smp.h> in setup.c
> unconditionally.
> 
> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> Signed-off-by: Shreyas B. Prabhu <shreyas@...ux.vnet.ibm.com>

Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>

Regards,
Srivatsa S. Bhat

> ---
>  arch/powerpc/platforms/powernv/setup.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
> index 8723d32..e6bde98 100644
> --- a/arch/powerpc/platforms/powernv/setup.c
> +++ b/arch/powerpc/platforms/powernv/setup.c
> @@ -34,6 +34,7 @@
>  #include <asm/rtas.h>
>  #include <asm/opal.h>
>  #include <asm/kexec.h>
> +#include <asm/smp.h>
> 
>  #include "powernv.h"
> 

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