From: Nathan Chancellor Date: Thu, 25 Mar 2021 22:38:07 +0000 (-0700) Subject: riscv: Select HAVE_DYNAMIC_FTRACE when -fpatchable-function-entry is available X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=adebc8817b5c975d598ac379bbdf67a7a5186ade;p=uclinux-h8%2Flinux.git 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 Signed-off-by: Nathan Chancellor Reviewed-by: Fangrui Song Signed-off-by: Palmer Dabbelt --- 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