Re: mmu.c:undefined reference to `patch__hash_page_A0'

[Christophe Leroy]

Le 18/04/2021 à 19:15, Randy Dunlap a écrit :
> On 4/18/21 3:43 AM, Christophe Leroy wrote:
> > Le 18/04/2021 à 02:02, Randy Dunlap a écrit :
> > > HI--
> > >
> > > I no longer see this build error.
> >
> > Fixed by https://github.com/torvalds/linux/commit/acdad8fb4a1574323db88f98a38b630691574e16
> >
> > > However:
> > >
> > > On 2/27/21 2:24 AM, kernel test robot wrote:
> > > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > > > head:   3fb6d0e00efc958d01c2f109c8453033a2d96796
> > > > commit: 259149cf7c3c6195e6199e045ca988c31d081cab powerpc/32s: Only build hash code when CONFIG_PPC_BOOK3S_604 is selected
> > > > date:   4 weeks ago
> > > > config: powerpc64-randconfig-r013-20210227 (attached as .config)
> > >
> > > ktr/lkp, this is a PPC32 .config file that is attached, not PPC64.
> > >
> > > Also:
> > >
> > > > compiler: powerpc-linux-gcc (GCC) 9.3.0
> >
> > ...
> >
> > > I do see this build error:
> > >
> > > powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
> > > decompress.c:(.text+0x1f0): undefined reference to `__decompress'
> > >
> > > when either
> > > CONFIG_KERNEL_LZO=y
> > > or
> > > CONFIG_KERNEL_LZMA=y
> > >
> > > but the build succeeds when either
> > > CONFIG_KERNEL_GZIP=y
> > > or
> > > CONFIG_KERNEL_XZ=y
> > >
> > > I guess that is due to arch/powerpc/boot/decompress.c doing this:
> > >
> > > #ifdef CONFIG_KERNEL_GZIP
> > > #    include "decompress_inflate.c"
> > > #endif
> > >
> > > #ifdef CONFIG_KERNEL_XZ
> > > #    include "xz_config.h"
> > > #    include "../../../lib/decompress_unxz.c"
> > > #endif
> > >
> > >
> > > It would be nice to require one of KERNEL_GZIP or KERNEL_XZ
> > > to be set/enabled (maybe unless a uImage is being built?).
> >
> >
> > Can you test by https://patchwork.ozlabs.org/project/linuxppc-dev/patch/a74fce4dfc9fa32da6ce3470bbedcecf795de1ec.1591189069.git.christophe.leroy@xxxxxxxxxx/ ?
>
> Hi Christophe,
>
> I get build errors for both LZO and LZMA:

Ok, the patch is almost 1 year old, I guess there has been changes that break it. Will see if I can 
find some time to look at it.

Christophe