On Sun, Sep 08, 2013 at 07:31:18PM -0700, Guenter Roeck wrote: > On 09/08/2013 07:31 PM, Greg Kroah-Hartman wrote: > >On Sun, Sep 08, 2013 at 07:24:19PM -0700, Guenter Roeck wrote: > >>On 09/08/2013 06:59 PM, Greg Kroah-Hartman wrote: > >>>On Sun, Sep 08, 2013 at 06:03:00PM -0700, Guenter Roeck wrote: > >>>>mips allmodconfig fails with > >>>> > >>>>ERROR: "copy_from_user_page" [drivers/staging/lustre/lustre/libcfs/libcfs.ko] > >>>>undefined! > >>>> > >>>>which is due to LUSTRE using copy_from_user_page which is not exported by any > >>>>architecture. > >>> > >>>Any, or just these arches? > >>> > >>Other architectures implement it as define as far as I can see. > > > >Then why would it be a problem? > > > It isn't a problem for those other architectures. Mostly it is mapped to functions like memcpy(). > > Guenter > > >>>>Unfortunately, LUSTRE can only be built as module, so there is no > >>>>easy fix. > >>> > >>>Can't we just export the functions for those arches? Surely lutre > >>>isn't the first/only driver that needs this? > >>> > >>That would be another option. > >> > >>Actually, turns out Geert submitted a patch to do this for mips already, and Ralf applied it: > >> > >>https://lkml.org/lkml/2013/9/5/111 > >> > >>So please forget this patch. If sh/xtensa actually need it, we can do the same there. > > > >Sounds good to me, consider it forgotten :) > > > >greg k-h The proper "fix" seems to be to get rid of this new usage of copy_from_user_page() in lustre. The code in question is nothing but a copy of __access_remote_vm() from mm/memory.c... _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
