jump_label: Make it possible for arches to invoke jump_label_init() e…

…arlier Some arches (powerpc at least) would like to invoke jump_label_init() much earlier in boot. So check static_key_initialized in order to make sure this function runs only once. LGTM-by: Ingo (http://marc.info/?l=linux-kernel&m=144049104329961&w=2) Signed-off-by: Kevin Hao <[email protected]> Signed-off-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
chewitt · Aug 1, 2016 · e3f9108 · e3f9108
1 parent b8f1b4f
commit e3f9108
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/kernel/jump_label.c b/kernel/jump_label.c
@@ -235,6 +235,9 @@ void __init jump_label_init(void)
 	struct static_key *key = NULL;
 	struct jump_entry *iter;
 
+	if (static_key_initialized)
+		return;
+
 	jump_label_lock();
 	jump_label_sort_entries(iter_start, iter_stop);