linux-kernel - Re: [PATCH v2 1/2] firmware_loader: revert removal of the fw_fallback

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Date:   Sat, 25 Apr 2020 10:14:55 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     akpm@...ux-foundation.org, josh@...htriplett.org,
        rishabhb@...eaurora.org, kubakici@...pl, maco@...roid.com,
        david.brown@...aro.org, bjorn.andersson@...aro.org,
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        shuah@...nel.org, mfuzzey@...keon.com, zohar@...ux.vnet.ibm.com,
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        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] firmware_loader: revert removal of the
 fw_fallback_config export

On Fri, Apr 24, 2020 at 06:49:15PM +0000, Luis R. Rodriguez wrote:
> From: Luis Chamberlain <mcgrof@...nel.org>
> 
> Christoph's patch removed two unsused exported symbols, however, one
> symbol is used by the firmware_loader itself.  If CONFIG_FW_LOADER=m so
> the firmware_loader is modular but CONFIG_FW_LOADER_USER_HELPER=y we fail
> the build at mostpost.
> 
> ERROR: modpost: "fw_fallback_config" [drivers/base/firmware_loader/firmware_class.ko] undefined!
> 
> This happens because the variable fw_fallback_config is built into the
> kernel if CONFIG_FW_LOADER_USER_HELPER=y always, so we need to grant
> access to the firmware loader module by exporting it.
> 
> Revert only one hunk from his patch.
> 
> Fixes: 739604734bd8e4ad71 ("firmware_loader: remove unused exports")

Fixes: 739604734bd8 ("firmware_loader: remove unused exports")

No need to be over-eager with the number of digits...

I'll fix this up when I apply it, thanks.

greg k-h