riscv: ftrace: support PREEMPT

Now, we can safely enable dynamic ftrace with kernel preemption.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://lore.kernel.org/r/20250407180838.42877-9-andybnac@gmail.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 7dbed10..dc0fc11 100644 (file)
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -157,7 +157,7 @@ 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 && !PREEMPTION
+       select HAVE_FUNCTION_TRACER if !XIP_KERNEL
        select HAVE_EBPF_JIT if MMU
        select HAVE_GUP_FAST if MMU
        select HAVE_FUNCTION_ARG_ACCESS_API