From: Kevin Hao <haokexin@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: [PATCH 2/8] jump_label: make it possible for the archs to invoke jump_label_init() much earlier
Date: Thu, 20 Aug 2015 20:14:30 +0800 [thread overview]
Message-ID: <1440072876-8321-3-git-send-email-haokexin@gmail.com> (raw)
In-Reply-To: <1440072876-8321-1-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>
---
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
next prev parent reply other threads:[~2015-08-20 12:15 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-20 12:14 [PATCH 0/8] powerpc: use jump label for {cpu,mmu}_has_feature() Kevin Hao
2015-08-20 12:14 ` [PATCH 1/8] jump_label: no need to acquire the jump_label_mutex in jump_lable_init() Kevin Hao
2015-08-20 18:29 ` Peter Zijlstra
2015-08-21 3:17 ` Kevin Hao
2015-08-20 12:14 ` Kevin Hao [this message]
2015-08-20 12:14 ` [PATCH 3/8] jump_label: introduce DEFINE_STATIC_KEY_{TRUE, FALSE}_ARRAY macros Kevin Hao
2015-08-20 18:31 ` [PATCH 3/8] jump_label: introduce DEFINE_STATIC_KEY_{TRUE,FALSE}_ARRAY macros Peter Zijlstra
2015-08-21 3:23 ` Kevin Hao
2015-08-21 6:28 ` Ingo Molnar
2015-08-21 6:34 ` Kevin Hao
2015-08-21 6:40 ` Ingo Molnar
2015-08-21 6:45 ` Kevin Hao
2015-08-20 12:14 ` [PATCH 4/8] powerpc: invoke jump_label_init() in a much earlier stage Kevin Hao
2015-08-20 12:14 ` [PATCH 5/8] powerpc: kill mfvtb() Kevin Hao
2015-08-20 12:14 ` [PATCH 6/8] powerpc: move the cpu_has_feature to a separate file Kevin Hao
2015-08-20 12:14 ` [PATCH 7/8] powerpc: use the jump label for cpu_has_feature Kevin Hao
2015-08-20 12:14 ` [PATCH 8/8] powerpc: use jump label for mmu_has_feature Kevin Hao
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