2 * Jump label s390 support
4 * Copyright IBM Corp. 2011
5 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
7 #include <linux/module.h>
8 #include <linux/uaccess.h>
9 #include <linux/stop_machine.h>
10 #include <linux/jump_label.h>
13 #ifdef HAVE_JUMP_LABEL
21 struct jump_entry *entry;
22 enum jump_label_type type;
25 static void __jump_label_transform(struct jump_entry *entry,
26 enum jump_label_type type)
31 if (type == JUMP_LABEL_ENABLE) {
34 insn.offset = (entry->target - entry->code) >> 1;
41 rc = probe_kernel_write((void *)entry->code, &insn, JUMP_LABEL_NOP_SIZE);
45 static int __sm_arch_jump_label_transform(void *data)
47 struct insn_args *args = data;
49 __jump_label_transform(args->entry, args->type);
53 void arch_jump_label_transform(struct jump_entry *entry,
54 enum jump_label_type type)
56 struct insn_args args;
61 stop_machine(__sm_arch_jump_label_transform, &args, NULL);
64 void arch_jump_label_transform_static(struct jump_entry *entry,
65 enum jump_label_type type)
67 __jump_label_transform(entry, type);