linux-kernel - Re: [PATCH] nios2: ksyms: Add missing symbol exports

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Message-ID: <1541751278.79160.2.camel@intel.com>
Date:   Fri, 09 Nov 2018 16:14:38 +0800
From:   Ley Foon Tan <ley.foon.tan@...el.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     nios2-dev@...ts.rocketboards.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nios2: ksyms: Add missing symbol exports

On Sun, 2018-10-07 at 07:53 -0700, Guenter Roeck wrote:
> Building nios2:allmodconfig fails as follows (each symbol is only
> listed
> once).
> 
> ERROR: "__ashldi3" [drivers/md/dm-writecache.ko] undefined!
> ERROR: "__ashrdi3" [fs/xfs/xfs.ko] undefined!
> ERROR: "__ucmpdi2" [drivers/media/i2c/adv7842.ko] undefined!
> ERROR: "__lshrdi3" [drivers/md/dm-zoned.ko] undefined!
> ERROR: "flush_icache_range" [drivers/misc/lkdtm/lkdtm.ko] undefined!
> ERROR: "empty_zero_page" [drivers/md/dm-mod.ko] undefined!
> 
> The problem is seen with gcc 7.3.0.
> 
> Export the missing symbols.
> 
> Fixes: 2fc8483fdcde ("nios2: Build infrastructure")
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Acked-by: Ley Foon Tan <ley.foon.tan@...el.com>

> ---
>  arch/nios2/kernel/nios2_ksyms.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/nios2/kernel/nios2_ksyms.c
> b/arch/nios2/kernel/nios2_ksyms.c
> index bf2f55d10a4d..4e704046a150 100644
> --- a/arch/nios2/kernel/nios2_ksyms.c
> +++ b/arch/nios2/kernel/nios2_ksyms.c
> @@ -9,12 +9,20 @@
>  #include <linux/export.h>
>  #include <linux/string.h>
> 
> +#include <asm/cacheflush.h>
> +#include <asm/pgtable.h>
> +
>  /* string functions */
> 
>  EXPORT_SYMBOL(memcpy);
>  EXPORT_SYMBOL(memset);
>  EXPORT_SYMBOL(memmove);
> 
> +/* memory management */
> +
> +EXPORT_SYMBOL(empty_zero_page);
> +EXPORT_SYMBOL(flush_icache_range);
> +
>  /*
>   * libgcc functions - functions that are used internally by the
>   * compiler...  (prototypes are not correct though, but that
> @@ -31,3 +39,7 @@ DECLARE_EXPORT(__udivsi3);
>  DECLARE_EXPORT(__umoddi3);
>  DECLARE_EXPORT(__umodsi3);
>  DECLARE_EXPORT(__muldi3);
> +DECLARE_EXPORT(__ucmpdi2);
> +DECLARE_EXPORT(__lshrdi3);
> +DECLARE_EXPORT(__ashldi3);
> +DECLARE_EXPORT(__ashrdi3);
> --
> 2.7.4
> 
> 
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