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 <haoke...@gmail.com>
---
 kernel/jump_label.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index df1a7fbe7cd5..fcae370f8794 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -205,6 +205,9 @@ 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);
 
        for (iter = iter_start; iter < iter_stop; iter++) {
-- 
2.1.0

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