diff options
| author | Nathan Chancellor <nathan@kernel.org> | 2021-03-25 23:38:07 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-04-26 17:25:02 +0200 |
| commit | adebc8817b5c975d598ac379bbdf67a7a5186ade (patch) | |
| tree | dc62627c49bed8d533ef81e92b2db3c87f461cd6 /arch/riscv | |
| parent | riscv: Workaround mcount name prior to clang-13 (diff) | |
| download | linux-adebc8817b5c975d598ac379bbdf67a7a5186ade.tar.xz linux-adebc8817b5c975d598ac379bbdf67a7a5186ade.zip | |
riscv: Select HAVE_DYNAMIC_FTRACE when -fpatchable-function-entry is available
clang prior to 13.0.0 does not support -fpatchable-function-entry for
RISC-V.
clang: error: unsupported option '-fpatchable-function-entry=8' for target 'riscv64-unknown-linux-gnu'
To avoid this error, only select HAVE_DYNAMIC_FTRACE when this option is
not available.
Fixes: afc76b8b8011 ("riscv: Using PATCHABLE_FUNCTION_ENTRY instead of MCOUNT")
Link: https://github.com/ClangBuiltLinux/linux/issues/1268
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Fangrui Song <maskray@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 82c469b340c2..a840004d2829 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -231,7 +231,7 @@ config ARCH_RV64I bool "RV64I" select 64BIT select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && GCC_VERSION >= 50000 - select HAVE_DYNAMIC_FTRACE if MMU + select HAVE_DYNAMIC_FTRACE if MMU && $(cc-option,-fpatchable-function-entry=8) select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_GRAPH_TRACER |