Subject: Re: linux-next: build warning after merge of the net tree

From: Michal Marek <[email-masked]>
Date: Tue, 23 Sep 2014 16:59:59 +0200

On 2014-09-18 02:35, Randy Dunlap wrote:
> On 09/17/14 17:32, Stephen Rothwell wrote:
>> Hi all,
>>
>> After merging the net tree, today's linux-next build (powerpc
>> ppc64_defconfig) produced these warnings:
>>
>> warning: (PPC_CELL_NATIVE && BLUESTONE && CANYONLANDS && GLACIER && EIGER && 440EPX && 440GRX && 440GX && 460SX && 405EX) selects IBM_EMAC_RGMII which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>> warning: (PPC_CELL_NATIVE && CANYONLANDS && GLACIER && 440EP && 440EPX && 440GRX && 440GP && 440GX && 460SX && 405GP) selects IBM_EMAC_ZMII which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>> warning: (PPC_CELL_NATIVE && 440GX && 460EX && 460SX && APM821xx) selects IBM_EMAC_TAH which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>> warning: (PPC_CELL_NATIVE && AKEBONO && 440EPX && 440GRX && 440GX && 440SPe && 460EX && 460SX && APM821xx && 405EX) selects IBM_EMAC_EMAC4 which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>> warning: (PPC_CELL_NATIVE && CANYONLANDS && GLACIER && 440EP && 440EPX && 440GRX && 440GP && 440GX && 460SX && 405GP) selects IBM_EMAC_ZMII which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>> warning: (PPC_CELL_NATIVE && BLUESTONE && CANYONLANDS && GLACIER && EIGER && 440EPX && 440GRX && 440GX && 460SX && 405EX) selects IBM_EMAC_RGMII which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>> warning: (PPC_CELL_NATIVE && 440GX && 460EX && 460SX && APM821xx) selects IBM_EMAC_TAH which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>> warning: (PPC_CELL_NATIVE && AKEBONO && 440EPX && 440GRX && 440GX && 440SPe && 460EX && 460SX && APM821xx && 405EX) selects IBM_EMAC_EMAC4 which has unmet direct dependencies (NETDEVICES && ETHERNET && NET_VENDOR_IBM)
>>
> 
> I have looked into these and don't see why there is a problem.
> Any help would be appreciated.

This is a side effect of 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK
dependent on NET instead of selecting NET"). Previously, SCSI_FC_ATTRS
would select SCSI_NETLINK which would select CONFIG_NET. The above
warnings are just a tip of the iceberg, the more serious issue is that
ppc64_defconfig is lacking networking support. This is the downside of
savedefconfig, because the 'select' implications can disappear over
time. Looks like more defconfigs are affected by this:

$ grep -rL CONFIG_NET= arch/*/configs/ | xargs grep -l CONFIG_SCSI_FC_ATTRS=
arch/ia64/configs/generic_defconfig
arch/ia64/configs/gensparse_defconfig
arch/mips/configs/ip27_defconfig
arch/mips/configs/malta_defconfig
arch/mips/configs/rm200_defconfig
arch/mips/configs/malta_kvm_guest_defconfig
arch/mips/configs/gpr_defconfig
arch/mips/configs/jazz_defconfig
arch/mips/configs/mtx1_defconfig
arch/mips/configs/malta_kvm_defconfig
arch/mips/configs/loongson3_defconfig
arch/parisc/configs/c8000_defconfig
arch/powerpc/configs/pseries_defconfig
arch/powerpc/configs/pseries_le_defconfig
arch/powerpc/configs/ppc64e_defconfig
arch/powerpc/configs/ppc64_defconfig
arch/powerpc/configs/pmac32_defconfig
arch/sh/configs/sh2007_defconfig
arch/sh/configs/sdk7780_defconfig
arch/sparc/configs/sparc64_defconfig

Michal