[PATCH v2 3/6] riscv: Add ftrace_stub_graph

[Sami Tolvanen]

Commit 883bbbffa5a4 ("ftrace,kcfi: Separate ftrace_stub() and
ftrace_stub_graph()") added a separate ftrace_stub_graph function for
CFI_CLANG. Add the stub to fix FUNCTION_GRAPH_TRACER compatibility
with CFI.

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Tested-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
---
 arch/riscv/kernel/mcount.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/kernel/mcount.S b/arch/riscv/kernel/mcount.S
index 6c9469050f4c..8818a8fa9ff3 100644
--- a/arch/riscv/kernel/mcount.S
+++ b/arch/riscv/kernel/mcount.S
@@ -57,6 +57,10 @@ SYM_TYPED_FUNC_START(ftrace_stub)
 SYM_FUNC_END(ftrace_stub)
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
+SYM_TYPED_FUNC_START(ftrace_stub_graph)
+	ret
+SYM_FUNC_END(ftrace_stub_graph)
+
 ENTRY(return_to_handler)
 /*
  * On implementing the frame point test, the ideal way is to compare the
-- 
2.41.0.255.g8b1d071c50-goog