linux-kernel - Re: [PATCH 31/36] powerpc: asm: hvconsole: Move 'hvc_vio_init

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Date:   Thu, 5 Nov 2020 08:10:22 +0100
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linuxppc-dev@...ts.ozlabs.org, Paul Mackerras <paulus@...ba.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 31/36] powerpc: asm: hvconsole: Move 'hvc_vio_init_early's
 prototype to shared location



Le 04/11/2020 à 20:35, Lee Jones a écrit :
> Fixes the following W=1 kernel build warning(s):
> 
>   drivers/tty/hvc/hvc_vio.c:385:13: warning: no previous prototype for ‘hvc_vio_init_early’ [-Wmissing-prototypes]
>   385 | void __init hvc_vio_init_early(void)
>   | ^~~~~~~~~~~~~~~~~~
> 
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: linuxppc-dev@...ts.ozlabs.org
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>   arch/powerpc/include/asm/hvconsole.h     | 3 +++
>   arch/powerpc/platforms/pseries/pseries.h | 3 ---
>   arch/powerpc/platforms/pseries/setup.c   | 1 +
>   3 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/powerpc/include/asm/hvconsole.h b/arch/powerpc/include/asm/hvconsole.h
> index 999ed5ac90531..936a1ee1ac786 100644
> --- a/arch/powerpc/include/asm/hvconsole.h
> +++ b/arch/powerpc/include/asm/hvconsole.h
> @@ -24,5 +24,8 @@
>   extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
>   extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
>   
> +/* Provided by HVC VIO */
> +extern void hvc_vio_init_early(void);
> +

Declaring a prototype 'extern' is pointless. Don't add new misuse of 'extern' keyword.


>   #endif /* __KERNEL__ */
>   #endif /* _PPC64_HVCONSOLE_H */
> diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
> index 13fa370a87e4e..7be5b054dfc36 100644
> --- a/arch/powerpc/platforms/pseries/pseries.h
> +++ b/arch/powerpc/platforms/pseries/pseries.h
> @@ -43,9 +43,6 @@ extern void pSeries_final_fixup(void);
>   /* Poweron flag used for enabling auto ups restart */
>   extern unsigned long rtas_poweron_auto;
>   
> -/* Provided by HVC VIO */
> -extern void hvc_vio_init_early(void);
> -
>   /* Dynamic logical Partitioning/Mobility */
>   extern void dlpar_free_cc_nodes(struct device_node *);
>   extern void dlpar_free_cc_property(struct property *);
> diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
> index 633c45ec406da..6999b83f06612 100644
> --- a/arch/powerpc/platforms/pseries/setup.c
> +++ b/arch/powerpc/platforms/pseries/setup.c
> @@ -71,6 +71,7 @@
>   #include <asm/swiotlb.h>
>   #include <asm/svm.h>
>   #include <asm/dtl.h>
> +#include <asm/hvconsole.h>
>   
>   #include "pseries.h"
>   #include "../../../../drivers/pci/pci.h"
> 

Christophe