From: Kevin Hao <haokexin@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/6] jump_label: make it possible for the archs to invoke jump_label_init() much earlier
Date: Mon, 24 Aug 2015 19:20:23 +0800 [thread overview]
Message-ID: <1440415228-8006-2-git-send-email-haokexin@gmail.com> (raw)
In-Reply-To: <1440415228-8006-1-git-send-email-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>
---
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
next prev parent reply other threads:[~2015-08-24 11:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-24 11:20 [PATCH v2 0/6] powerpc: use jump label for {cpu,mmu}_has_feature() Kevin Hao
2015-08-24 11:20 ` Kevin Hao [this message]
2015-08-24 11:20 ` [PATCH v2 2/6] powerpc: invoke jump_label_init() in a much earlier stage Kevin Hao
2015-08-24 11:20 ` [PATCH v2 3/6] powerpc: kill mfvtb() Kevin Hao
2015-09-07 9:29 ` [v2,3/6] " Michael Ellerman
2015-09-08 2:59 ` Kevin Hao
2015-08-24 11:20 ` [PATCH v2 4/6] powerpc: move the cpu_has_feature to a separate file Kevin Hao
2015-08-24 11:20 ` [PATCH v2 5/6] powerpc: use the jump label for cpu_has_feature Kevin Hao
2015-08-24 11:20 ` [PATCH v2 6/6] powerpc: use jump label for mmu_has_feature Kevin Hao
2015-08-25 8:23 ` [PATCH v2 0/6] powerpc: use jump label for {cpu,mmu}_has_feature() Ingo Molnar
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