objtool: Avoid iterating !text section symbols

validate_functions() iterates all sections their symbols; this is
pointless to do for !text sections as they won't have instructions
anyway.

Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Reviewed-by: Miroslav Benes <[email protected]>
Reviewed-by: Alexandre Chartre <[email protected]>
Acked-by: Josh Poimboeuf <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

Author: Peter Zijlstra

tools/objtool/check.c

@@ -2551,8 +2551,12 @@ static int validate_functions(struct objtool_file *file)
 	struct section *sec;
 	int warnings = 0;
 
-	for_each_sec(file, sec)
+	for_each_sec(file, sec) {
+		if (!(sec->sh.sh_flags & SHF_EXECINSTR))
+			continue;
+
 		warnings += validate_section(file, sec);
+	}
 
 	return warnings;
 }