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[for-4.8,V2,04/10] jump_label: make it possible for the archs to invoke jump_label_init() much earlier

Message ID 1469265163-1491-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com (mailing list archive)
State Accepted
Headers show

Commit Message

Aneesh Kumar K.V July 23, 2016, 9:12 a.m. UTC 
From: Kevin Hao <haokexin@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@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 kernel/jump_label.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index 05254eeb4b4e..14d81315fd7e 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_lock();
 	jump_label_sort_entries(iter_start, iter_stop);