Unverified Commit 5874ca4c authored by Alexandre Ghiti's avatar Alexandre Ghiti Committed by Palmer Dabbelt
Browse files

riscv: Stop supporting static ftrace 



Now that DYNAMIC_FTRACE was introduced, there is no need to support
static ftrace as it is way less performant. This simplifies the code and
prevents build failures as reported by kernel test robot when
!DYNAMIC_FTRACE.

Also make sure that FUNCTION_TRACER can only be selected if
DYNAMIC_FTRACE is supported (we have a dependency on the toolchain).

Co-developed-by: default avatarchenmiao <chenmiao.ku@gmail.com>
Signed-off-by: default avatarchenmiao <chenmiao.ku@gmail.com>
Fixes: b2137c3b ("riscv: ftrace: prepare ftrace for atomic code patching")
Reported-by: default avatarkernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202506191949.o3SMu8Zn-lkp@intel.com/


Signed-off-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20250716-dev-alex-static_ftrace-v1-1-ba5d2b6fc9c0@rivosinc.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@dabbelt.com>
parent b3510183

arch/riscv/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -98,6 +98,7 @@ config RISCV 
	select CLONE_BACKWARDS

	select COMMON_CLK

	select CPU_PM if CPU_IDLE || HIBERNATION || SUSPEND

	select DYNAMIC_FTRACE if FUNCTION_TRACER

	select EDAC_SUPPORT

	select FRAME_POINTER if PERF_EVENTS || (FUNCTION_TRACER && !DYNAMIC_FTRACE)

	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
@@ -162,7 +163,7 @@ config RISCV 
	select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL

	select HAVE_FUNCTION_GRAPH_TRACER if HAVE_DYNAMIC_FTRACE_WITH_ARGS

	select HAVE_FUNCTION_GRAPH_FREGS

	select HAVE_FUNCTION_TRACER if !XIP_KERNEL

	select HAVE_FUNCTION_TRACER if !XIP_KERNEL && HAVE_DYNAMIC_FTRACE

	select HAVE_EBPF_JIT if MMU

	select HAVE_GUP_FAST if MMU

	select HAVE_FUNCTION_ARG_ACCESS_API