objtool: Fix STACK_FRAME_NON_STANDARD for cold subfunctions

The recent STACK_FRAME_NON_STANDARD refactoring forgot about .cold
subfunctions.  They must also be ignored.

Fixes the following warning:

  drivers/gpu/drm/vmwgfx/vmwgfx_msg.o: warning: objtool: vmw_recv_msg.cold+0x0: unreachable instruction

Fixes: c84301d706c5 ("objtool: Ignore entire functions rather than instructions")
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/70a09ec0b0704398b2bbfb3153ce3d7cb8a381be.1743136205.git.jpoimboe@kernel.org

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 29de1709ea004dbf486b06c5a7bae4c7401b28c3..fff9d7a2947ae53e966bfb776c23877964a73939 100644 (file)
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1014,6 +1014,8 @@ static int add_ignores(struct objtool_file *file)
                }
 
                func->ignore = true;
+               if (func->cfunc)
+                       func->cfunc->ignore = true;
        }
 
        return 0;