netdev - Re: [PATCH] net: tulip: turn compile-time warning into dev

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Date:	Fri, 20 Nov 2015 11:03:14 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	arnd@...db.de
Cc:	netdev@...r.kernel.org, will.deacon@....com,
	ard.biesheuvel@...aro.org, grundler@...isc-linux.org
Subject: Re: [PATCH] net: tulip: turn compile-time warning into dev_warn()

From: Arnd Bergmann <arnd@...db.de>
Date: Thu, 19 Nov 2015 11:42:26 +0100

> The tulip driver causes annoying build-time warnings for allmodconfig
> builds for all recent architectures:
> 
> dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined
> dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined!
> 
> This is the last remaining warning for arm64, and I'd like to get rid of
> it. We don't really know the cache line size, architecturally it would
> be at least 16 bytes, but all implementations I found have 64 or 128
> bytes. Configuring tulip for 32-byte lines as we do on ARM32 seems to
> be the safe but slow default, and nobody who cares about performance these
> days would use a tulip chip anyway, so we can just use that.
> 
> To save the next person the job of trying to find out what this is for
> and picking a default for their architecture just to kill off the warning,
> I'm now removing the preprocessor #warning and turning it into a pr_warn
> or dev_warn that prints the equivalent information when the driver gets
> loaded.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Seems reasonable, applied, thanks Arnd!
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