riscv: Adjust dependencies of HAVE_DYNAMIC_FTRACE selection
authorNathan Chancellor <nathan@kernel.org>
Tue, 4 Apr 2023 20:34:21 +0000 (13:34 -0700)
committerPalmer Dabbelt <palmer@rivosinc.com>
Sat, 29 Apr 2023 18:27:32 +0000 (11:27 -0700)
commitb3d6bdfea21ce1bbb45c3e6f297dfaf570d36300
tree83b8a82c53d9561ae15e34d6690124be945d2ff8
parent89d77f71f493a3663b10fa812d17f472935d24be
riscv: Adjust dependencies of HAVE_DYNAMIC_FTRACE selection

When building allmodconfig with clang and its integrated assembler and
linking with a version of GNU ld prior to 2.36, the following link error
occurs:

  riscv64-linux-gnu-ld: .init.data has both ordered [`__patchable_function_entries' in init/main.o] and unordered [`.init_array.0' in kernel/trace/trace_benchmark.o] sections
  riscv64-linux-gnu-ld: final link failed: bad value

This is the same error addressed by commit 45bd8951806e ("arm64: Improve
HAVE_DYNAMIC_FTRACE_WITH_REGS selection for clang") for arm64. See that
changelog for a full description of why this error occurs with this
combination of tools.

In a similar manner as that change, restrict the
CONFIG_HAVE_DYNAMIC_FTRACE selection to combinations of tools known to
work so that there are no errors.

Link: https://github.com/ClangBuiltLinux/linux/issues/1817
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230404-riscv-dynamic-ftrace-checks-clang-v1-1-0ce296b7d423@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
arch/riscv/Kconfig