objtool: Explicitly avoid self modifying code in .altinstr_replacement

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2090231



commit dd003ede
Author: Peter Zijlstra <peterz@infradead.org>
Date:   Tue, 26 Oct 2021 14:01:34 +0200

    objtool: Explicitly avoid self modifying code in .altinstr_replacement

    Assume ALTERNATIVE()s know what they're doing and do not change, or
    cause to change, instructions in .altinstr_replacement sections.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Alexei Starovoitov <ast@kernel.org>
    Link: https://lore.kernel.org/r/20211026120309.722511775@infradead.org



Signed-off-by: Waiman Long <longman@redhat.com>