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Date: Wed, 28 Jan 2015 22:03:09 +0100 From: Arnd Bergmann <arnd@...db.de> To: Murali Karicheri <m-karicheri2@...com> Cc: David Miller <davem@...emloft.net>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [PATCH net-next v8 0/4] net: Add Keystone NetCP ethernet driver support On Wednesday 28 January 2015 15:43:57 Murali Karicheri wrote: > > this. Hope I am on the right track. > > Reproduced this. Following errors seen when building the modules. > > LD [M] drivers/net/ethernet/ti/keystone_netcp.o > drivers/net/ethernet/ti/netcp_ethss.o: In function `init_module': > netcp_ethss.c:(.init.text+0x0): multiple definition of `init_module' > drivers/net/ethernet/ti/netcp_core.o:netcp_core.c:(.init.text+0x0): > first defined here > drivers/net/ethernet/ti/netcp_ethss.o: In function `cleanup_module': > netcp_ethss.c:(.exit.text+0x0): multiple definition of `cleanup_module' > drivers/net/ethernet/ti/netcp_core.o:netcp_core.c:(.exit.text+0x0): > first defined here > make[4]: *** [drivers/net/ethernet/ti/keystone_netcp.o] Error 1 > > BTW, I had to disable cpsw_ale.c to get to build keystone NetCP. I am > assuming someone from TI is addressing this. > > drivers/net/ethernet/ti/cpsw_ale.c: In function ‘cpsw_ale_start’: > drivers/net/ethernet/ti/cpsw_ale.c:759:2: error: ‘KBUILD_MODNAME’ > undeclared (first use in this function) > drivers/net/ethernet/ti/cpsw_ale.c:759:2: note: each undeclared > identifier is reported only once for each function it appears in I think both problems are nontrivial to fix. The first one is obviously that there are multiple init_module functions in one module. You have to either split the driver into multiple loadable modules with at most one init_module/cleanup_module pair each, or call one of the functions from the other one in the right order. The second problem is where I got stuck myself: cpsw_ale.c (also cpts.c) is getting linked into both modules, which is not allowed: It is impossible for the kernel to compile these if one driver is a module and the other one is not, and any use of KBUILD_MODNAME fails because it is unclear what the modname is if the file is compiled once to be linked into two drivers. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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