Subject: Re: linux-next: build failure after merge of the final tree (net-next tree related)

From: Mika Westerberg <[email-masked]>
Date: Thu, 20 Sep 2012 12:10:14 +0300

On Thu, Sep 20, 2012 at 05:36:22PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the final tree, today's linux-next build (powerpc
> allyesconfig) failed like this:
> 
> drivers/net/ethernet/i825xx/znet.c: In function 'hardware_init':
> drivers/net/ethernet/i825xx/znet.c:868:2: error: implicit declaration of function 'isa_virt_to_bus' [-Werror=implicit-function-declaration]
> 
> Caused by commit 1d3ff76759b7 ("i825xx: znet: fix compiler warnings when
> building a 64-bit kernel").  Is there some Kconfig dependency missing (CONFIG_ISA)?

If we make it dependent on CONFIG_ISA then the driver cannot be built with
64-bit kernel. Then again is there someone running 64-bit kernel on Zenith
Z-note notebook? From the pictures it looks like very ancient "laptop".

An alternative is to make it depend on X86 like this:

diff --git a/drivers/net/ethernet/i825xx/Kconfig b/drivers/net/ethernet/i825xx/Kconfig
index fed5080..959faf7 100644
--- a/drivers/net/ethernet/i825xx/Kconfig
+++ b/drivers/net/ethernet/i825xx/Kconfig
@@ -150,7 +150,7 @@ config SUN3_82586
 
 config ZNET
 	tristate "Zenith Z-Note support (EXPERIMENTAL)"
-	depends on EXPERIMENTAL && ISA_DMA_API
+	depends on EXPERIMENTAL && ISA_DMA_API && X86
 	---help---
 	  The Zenith Z-Note notebook computer has a built-in network
 	  (Ethernet) card, and this is the Linux driver for it. Note that the