From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH]dgrs - Fixes Warnings when CONFIG_ISA and CONFIG_PCI are
 not enabled
Date: Sat, 5 Nov 2005 00:46:09 -0800
Message-ID: <20051105004609.0f04481c.akpm@osdl.org>
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	<20051104182537.741be3d9.akpm@osdl.org>
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	<436C6F02.90904@student.ltu.se>
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Cc: ashutosh.lkml@gmail.com, netdev@vger.kernel.org, davej@suse.de,
	acme@conectiva.com.br, linux-net@vger.kernel.org,
	linux-kernel@vger.kernel.org, stable@kernel.org
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To: Richard Knutsson <ricknu-0@student.ltu.se>
In-Reply-To: <436C6F02.90904@student.ltu.se>
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Richard Knutsson <ricknu-0@student.ltu.se> wrote:
>
> > 	 */
>  > #ifdef CONFIG_EISA
>  >-	eisacount = eisa_driver_register(&dgrs_eisa_driver);
>  >-	if (eisacount < 0)
>  >-		return eisacount;
>  >-#endif
>  >-#ifdef CONFIG_PCI
>  >-	pcicount = pci_register_driver(&dgrs_pci_driver);
>  >-	if (pcicount)
>  >-		return pcicount;
>  >+	cardcount = eisa_driver_register(&dgrs_eisa_driver);
>  >+	if (cardcount < 0)
>  >+		return cardcount;
>  > #endif
>  >+	cardcount = pci_register_driver(&dgrs_pci_driver);
>  >+	if (cardcount)
>  >+		return cardcount;
>  > 	return 0;
>  > }
>  >  
>  >
>  I do not know what to think about this one:
>  * reduce one #ifdef: good
>  * check for something clearly stated not to: not so good

Well a nicer fix would be to provide a stub implementation of
eisa_driver_register() if !CONFIG_EISA, just like pci_register_driver(). 
Then all the ifdefs go away and the compiler removes all the code for us,
after checking that we typed it correctly.