Re: [PATCH v2 5/6] esp_scsi: De-duplicate PIO routines

[Finn Thain]

On Mon, 15 Oct 2018, Hannes Reinecke wrote:

> 
> However, the function declaration really is a worry, as the actual function
> body only exists when the config option is enabled.
> So either add a dummy function or surround the function declaration by
> CONFIG_ESP_PIO.
> Otherwise I think Dan Carpenter and the likes are guaranteed to send you a
> nice mail complaining about this ...
> 

Perhaps I've misunderstood your concern here. Is it a problem that 
esp_scsi.ko may or may not export the function, depending on .config?

For example, if esp_scsi.ko came from a build with CONFIG_SUN3X_ESP=y && 
!CONFIG_SCSI_ZORRO_ESP && !CONFIG_SCSI_MAC_ESP, then it would export no 
esp_send_pio_cmd() symbol.

A dummy function (mentioned above) might then avoid a link error from 
"modprobe zorro_esp" or "modprobe mac_esp" in this scenario. (The modules 
would load but fail to work properly.)

This seems a bit too contrived so I'll post v3 for you to consider.

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