linux-kernel - Re: [PATCH] Hexagon: Export raw I/O routines for modules

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Message-ID: <YQrbwnDf7KaiSMzF@Ryzen-9-3900X.localdomain>
Date:   Wed, 4 Aug 2021 11:26:10 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-hexagon@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com,
        Brian Cain <bcain@...eaurora.org>
Subject: Re: [PATCH] Hexagon: Export raw I/O routines for modules

Andrew, could you pick this up? Brian gave his ack and we just got a
0day report about this:

https://lore.kernel.org/r/202108041936.52T4sUU6-lkp@intel.com/

If you need me to resend this, I can.

Cheers,
Nathan

On Thu, Jul 08, 2021 at 04:38:50PM -0700, Nathan Chancellor wrote:
> When building ARCH=hexagon allmodconfig, the following errors occur:
> 
> ERROR: modpost: "__raw_readsl" [drivers/i3c/master/svc-i3c-master.ko] undefined!
> ERROR: modpost: "__raw_writesl" [drivers/i3c/master/dw-i3c-master.ko] undefined!
> ERROR: modpost: "__raw_readsl" [drivers/i3c/master/dw-i3c-master.ko] undefined!
> ERROR: modpost: "__raw_writesl" [drivers/i3c/master/i3c-master-cdns.ko] undefined!
> ERROR: modpost: "__raw_readsl" [drivers/i3c/master/i3c-master-cdns.ko] undefined!
> 
> Export these symbols so that modules can use them without any errors.
> 
> Fixes: 013bf24c3829 ("Hexagon: Provide basic implementation and/or stubs for I/O routines.")
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>
> ---
> 
> It would be nice if this could get into 5.14 at some point so that we
> can build ARCH=hexagon allmodconfig in our CI.
> 
>  arch/hexagon/lib/io.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/hexagon/lib/io.c b/arch/hexagon/lib/io.c
> index d35d69d6588c..55f75392857b 100644
> --- a/arch/hexagon/lib/io.c
> +++ b/arch/hexagon/lib/io.c
> @@ -27,6 +27,7 @@ void __raw_readsw(const void __iomem *addr, void *data, int len)
>  		*dst++ = *src;
>  
>  }
> +EXPORT_SYMBOL(__raw_readsw);
>  
>  /*
>   * __raw_writesw - read words a short at a time
> @@ -47,6 +48,7 @@ void __raw_writesw(void __iomem *addr, const void *data, int len)
>  
>  
>  }
> +EXPORT_SYMBOL(__raw_writesw);
>  
>  /*  Pretty sure len is pre-adjusted for the length of the access already */
>  void __raw_readsl(const void __iomem *addr, void *data, int len)
> @@ -62,6 +64,7 @@ void __raw_readsl(const void __iomem *addr, void *data, int len)
>  
>  
>  }
> +EXPORT_SYMBOL(__raw_readsl);
>  
>  void __raw_writesl(void __iomem *addr, const void *data, int len)
>  {
> @@ -76,3 +79,4 @@ void __raw_writesl(void __iomem *addr, const void *data, int len)
>  
>  
>  }
> +EXPORT_SYMBOL(__raw_writesl);
> 
> base-commit: f55966571d5eb2876a11e48e798b4592fa1ffbb7
> -- 
> 2.32.0.93.g670b81a890