On Mon, Sep 09, 2024 at 11:29:23AM +0200, Peter Zijlstra wrote:
On Mon, Sep 09, 2024 at 09:47:28AM +0300, Mike Rapoport wrote:
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 8da0e66ca22d..563d9a890ce2 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -654,4 +656,15 @@ void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
}
#endif
+void ftrace_swap_func(void *a, void *b, int n)
+{
+ unsigned long t;
+
+ WARN_ON_ONCE(n != sizeof(t));
+
+ t = *((unsigned long *)a);
+ text_poke_copy(a, b, sizeof(t));
+ text_poke_copy(b, &t, sizeof(t));
+}
This is insane, just force BUILDTIME_MCOUNT_SORT
The comment in ftrace.c says "... while mcount loc in modules can not be
sorted at build time"
I don't know enough about objtool, but I'd presume it's because the sorting
should happen after relocations, no?
--
Sincerely yours,
Mike.
