linux-kernel - Re: [PATCH] arch/mips/boot/compressed/string.c: Fix build warnings

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Date:   Wed, 19 May 2021 22:00:07 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     zhaoxiao <zhaoxiao@...ontech.com>, tsbogend@...ha.franken.de
Cc:     paul@...pouillou.net, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch/mips/boot/compressed/string.c: Fix build warnings



在 2021/5/19 16:44, zhaoxiao 写道:
> Fixes the following W=1 kernel build warning(s):
> arch/mips/boot/compressed/string.c:11:7: warning: no previous prototype for 'memcpy' [-Wmissing-prototypes]
>   void *memcpy(void *dest, const void *src, size_t n)
>         ^~~~~~
> arch/mips/boot/compressed/string.c:22:7: warning: no previous prototype for 'memset' [-Wmissing-prototypes]
>   void *memset(void *s, int c, size_t n)
>         ^~~~~~
> arch/mips/boot/compressed/string.c:32:15: warning: no previous prototype for 'memmove' [-Wmissing-prototypes]
>   void * __weak memmove(void *dest, const void *src, size_t n)
Hi Xiao,

Are you sure you know what you're doing?

They're supposed to be called by external reference in vmlinuz.
Marking them static makes no sense.

Thanks.

- Jiaxun
>                 ^~~~~~~
>
> Signed-off-by: zhaoxiao <zhaoxiao@...ontech.com>
> ---
>   arch/mips/boot/compressed/string.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/mips/boot/compressed/string.c b/arch/mips/boot/compressed/string.c
> index 0b593b709228..d28996509f91 100644
> --- a/arch/mips/boot/compressed/string.c
> +++ b/arch/mips/boot/compressed/string.c
> @@ -8,7 +8,7 @@
>   #include <linux/compiler_attributes.h>
>   #include <linux/types.h>
>   
> -void *memcpy(void *dest, const void *src, size_t n)
> +static void *memcpy(void *dest, const void *src, size_t n)
>   {
>   	int i;
>   	const char *s = src;
> @@ -19,7 +19,7 @@ void *memcpy(void *dest, const void *src, size_t n)
>   	return dest;
>   }
>   
> -void *memset(void *s, int c, size_t n)
> +static void *memset(void *s, int c, size_t n)
>   {
>   	int i;
>   	char *ss = s;
> @@ -29,7 +29,7 @@ void *memset(void *s, int c, size_t n)
>   	return s;
>   }
>   
> -void * __weak memmove(void *dest, const void *src, size_t n)
> +static void * __weak memmove(void *dest, const void *src, size_t n)
>   {
>   	unsigned int i;
>   	const char *s = src;