current kernels do not boot, they hang after 'returning from prom_init' gcc4.1 and mainline miscompile arch/powerpc/mm/hash_utils_64.c. Taking the object file from a gcc4.0 compiled tree fixes booting.
gcc-mainline r108000 binutils-mainline -> fails gcc-4_0-branch r107977 binutils-mainline -> works gcc-4_1-branch r106530 (+patch r106693 from bug #24644) binutils-mainline 2005-11-05 -> fails -- Summary: 2.6.15-rc4 arch/powerpc/mm/hash_utils_64.c miscompiled Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: olh at suse dot de GCC build triplet: powerpc64-linux GCC host triplet: powerpc64-linux GCC target triplet: powerpc64-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25248