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-rw-r--r--kernel/jump_label.c37
1 files changed, 21 insertions, 16 deletions
diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index a8ce450..bbdfe2a 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -104,6 +104,18 @@ static int __jump_label_text_reserved(struct jump_entry *iter_start,
return 0;
}
+/*
+ * Update code which is definitely not currently executing.
+ * Architectures which need heavyweight synchronization to modify
+ * running code can override this to make the non-live update case
+ * cheaper.
+ */
+void __weak arch_jump_label_transform_static(struct jump_entry *entry,
+ enum jump_label_type type)
+{
+ arch_jump_label_transform(entry, type);
+}
+
static void __jump_label_update(struct jump_label_key *key,
struct jump_entry *entry,
struct jump_entry *stop, int enable)
@@ -121,14 +133,7 @@ static void __jump_label_update(struct jump_label_key *key,
}
}
-/*
- * Not all archs need this.
- */
-void __weak arch_jump_label_text_poke_early(jump_label_t addr)
-{
-}
-
-static __init int jump_label_init(void)
+void __init jump_label_init(void)
{
struct jump_entry *iter_start = __start___jump_table;
struct jump_entry *iter_stop = __stop___jump_table;
@@ -139,22 +144,22 @@ static __init int jump_label_init(void)
jump_label_sort_entries(iter_start, iter_stop);
for (iter = iter_start; iter < iter_stop; iter++) {
- arch_jump_label_text_poke_early(iter->code);
- if (iter->key == (jump_label_t)(unsigned long)key)
+ struct jump_label_key *iterk;
+
+ iterk = (struct jump_label_key *)(unsigned long)iter->key;
+ arch_jump_label_transform_static(iter, jump_label_enabled(iterk) ?
+ JUMP_LABEL_ENABLE : JUMP_LABEL_DISABLE);
+ if (iterk == key)
continue;
- key = (struct jump_label_key *)(unsigned long)iter->key;
- atomic_set(&key->enabled, 0);
+ key = iterk;
key->entries = iter;
#ifdef CONFIG_MODULES
key->next = NULL;
#endif
}
jump_label_unlock();
-
- return 0;
}
-early_initcall(jump_label_init);
#ifdef CONFIG_MODULES
@@ -212,7 +217,7 @@ void jump_label_apply_nops(struct module *mod)
return;
for (iter = iter_start; iter < iter_stop; iter++)
- arch_jump_label_text_poke_early(iter->code);
+ arch_jump_label_transform_static(iter, JUMP_LABEL_DISABLE);
}
static int jump_label_add_module(struct module *mod)
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