From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Nathan Chancellor nathan@kernel.org
commit e9c6deee00e9197e75cd6aa0d265d3d45bd7cc28 upstream
Similar to commit 28187dc8ebd9 ("ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLD"), ld.lld prior to 13.0.0 does not properly support aarch64 big endian, leading to the following build error when CONFIG_CPU_BIG_ENDIAN is selected:
ld.lld: error: unknown emulation: aarch64linuxb
This has been resolved in LLVM 13. To avoid errors like this, only allow CONFIG_CPU_BIG_ENDIAN to be selected if using ld.bfd or ld.lld 13.0.0 and newer.
While we are here, the indentation of this symbol used spaces since its introduction in commit a872013d6d03 ("arm64: kconfig: allow CPU_BIG_ENDIAN to be selected"). Change it to tabs to be consistent with kernel coding style.
Link: https://github.com/ClangBuiltLinux/linux/issues/380 Link: https://github.com/ClangBuiltLinux/linux/issues/1288 Link: https://github.com/llvm/llvm-project/commit/7605a9a009b5fa3bdac07e3131c8d82f... Link: https://github.com/llvm/llvm-project/commit/eea34aae2e74e9b6fbdd5b95f479bc7f... Reported-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Nathan Chancellor nathan@kernel.org Reviewed-by: Nick Desaulniers ndesaulniers@google.com Link: https://lore.kernel.org/r/20210209005719.803608-1-nathan@kernel.org Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm64/Kconfig | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -952,8 +952,9 @@ choice that is selected here.
config CPU_BIG_ENDIAN - bool "Build big-endian kernel" - help + bool "Build big-endian kernel" + depends on !LD_IS_LLD || LLD_VERSION >= 130000 + help Say Y if you plan on running a kernel with a big-endian userspace.
config CPU_LITTLE_ENDIAN