linux-kernel - [PATCH v2 1/6] jump_label: make it possible for the archs to invoke jump_label

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Message-Id: <1440415228-8006-2-git-send-email-haokexin@gmail.com>
Date:	Mon, 24 Aug 2015 19:20:23 +0800
From:	Kevin Hao <haokexin@...il.com>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/6] jump_label: make it possible for the archs to invoke jump_label_init() much earlier

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@...il.com>
---
v2: No change.

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

diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index f7dd15d537f9..cfc7d7b65432 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);
 
-- 
2.1.0

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