powerpc/ftrace: ensure ftrace record ops are always set for NOPs

JIRA: https://issues.redhat.com/browse/RHEL-113085

commit 5337609
Author: Joe Lawrence <joe.lawrence@redhat.com>
Date:   Fri Sep 12 10:27:38 2025 -0400

    powerpc/ftrace: ensure ftrace record ops are always set for NOPs

    When an ftrace call site is converted to a NOP, its corresponding
    dyn_ftrace record should have its ftrace_ops pointer set to
    ftrace_nop_ops.

    Correct the powerpc implementation to ensure the
    ftrace_rec_set_nop_ops() helper is called on all successful NOP
    initialization paths. This ensures all ftrace records are consistent
    before being handled by the ftrace core.

    Fixes: eec3796 ("powerpc64/ftrace: Move ftrace sequence out of line")
    Suggested-by: Naveen N Rao <naveen@kernel.org>
    Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
    Acked-by: Naveen N Rao (AMD) <naveen@kernel.org>
    Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
    Link: https://patch.msgid.link/20250912142740.3581368-2-joe.lawrence@redhat.com

Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>

Author: joe-lawrence

arch/powerpc/kernel/trace/ftrace.c

@@ -490,8 +490,10 @@ int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
 		return ret;
 
 	/* Set up out-of-line stub */
-	if (IS_ENABLED(CONFIG_PPC_FTRACE_OUT_OF_LINE))
-		return ftrace_init_ool_stub(mod, rec);
+	if (IS_ENABLED(CONFIG_PPC_FTRACE_OUT_OF_LINE)) {
+		ret = ftrace_init_ool_stub(mod, rec);
+		goto out;
+	}
 
 	/* Nop-out the ftrace location */
 	new = ppc_inst(PPC_RAW_NOP());
@@ -522,6 +524,10 @@ int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
 		return -EINVAL;
 	}
 
+out:
+	if (!ret)
+		ret = ftrace_rec_set_nop_ops(rec);
+
 	return ret;
 }