6.1-stable review patch. If anyone has any objections, please let me know.
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From: Nathan Chancellor nathan@kernel.org
commit a11334d8327b3fd7987cbfb38e956a44c722d88f upstream.
Commit 5017b4594672 ("powerpc/64: Option to build big-endian with ELFv2 ABI") restricted the ELFv2 ABI configuration such that it can only be selected when linking with ld.bfd, due to lack of testing with LLVM.
ld.lld can link ELFv2 kernels without any issues; in fact, it is the only ABI that ld.lld supports, as ELFv1 is not supported in ld.lld.
As this has not seen a ton of real world testing yet, be conservative and only allow this option to be selected with the latest stable release of LLVM (15.x) and newer.
While in the area, remove 'default n', as it is unnecessary to specify it explicitly since all boolean/tristate configuration symbols default to n.
Tested-by: "Erhard F." erhard_f@mailbox.org Signed-off-by: Nathan Chancellor nathan@kernel.org Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://msgid.link/20230118-ppc64-elfv2-llvm-v1-3-b9e2ec9da11d@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/powerpc/Kconfig | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -593,8 +593,7 @@ config PPC64_BIG_ENDIAN_ELF_ABI_V2 bool "Build big-endian kernel using ELF ABI V2 (EXPERIMENTAL)" depends on PPC64 && CPU_BIG_ENDIAN depends on CC_HAS_ELFV2 - depends on LD_IS_BFD && LD_VERSION >= 22400 - default n + depends on LD_VERSION >= 22400 || LLD_VERSION >= 150000 help This builds the kernel image using the "Power Architecture 64-Bit ELF V2 ABI Specification", which has a reduced stack overhead and faster