[PATCH for-4.8 04/10] jump_label: make it possible for the archs to invoke jump_label_init() much earlier

Aneesh Kumar K.V aneesh.kumar at linux.vnet.ibm.com
Wed Jul 13 19:38:04 AEST 2016

From: Kevin Hao <haokexin at gmail.com>

For some archs (such as powerpc) would want to invoke jump_label_init()
in a much earlier stage. So check static_key_initialized in order to
make sure this function run only once.

Signed-off-by: Kevin Hao <haokexin at gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>

Ingo did ack this patch in email
But there was no Acked-by: 

 kernel/jump_label.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index 4b353e0be121..8ada9f5dc507 100644
--- 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_sort_entries(iter_start, iter_stop);

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