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authorNicholas Piggin <npiggin@gmail.com>2018-05-30 15:19:19 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2018-06-01 16:08:03 +0300
commit4bf4f42a2febb449a5cc5d79e7c58e5b168942d7 (patch)
treeb90f527c27de466297efb79951b5922b1e9799fc /drivers
parent6da6c0db5316275015e8cc2959f12a17584aeb64 (diff)
downloadlinux-4bf4f42a2febb449a5cc5d79e7c58e5b168942d7.tar.xz
powerpc/kbuild: Set default generic machine type for 32-bit compile
Some 64-bit toolchains uses the wrong ISA variant for compiling 32-bit kernels, even with -m32. Debian's powerpc64le is one such case, and that is because it is built with --with-cpu=power8. So when cross compiling a 32-bit kernel with a 64-bit toolchain, set -mcpu=powerpc initially, which is the generic 32-bit powerpc machine type and scheduling model. CPU and platform code can override this with subsequent -mcpu flags if necessary. This is not done for 32-bit toolchains otherwise it would override their defaults, which are presumably set appropriately for the environment (moreso than a 64-bit cross compiler). This fixes a lot of build failures due to incompatible assembly when compiling 32-bit kernel with the Debian powerpc64le 64-bit toolchain. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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