39 lines
1.1 KiB
Diff
39 lines
1.1 KiB
Diff
From a2d385e504323641b1127821833c61e77301c90b Mon Sep 17 00:00:00 2001
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From: Jussi Kukkonen <jussi.kukkonen@intel.com>
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Date: Sat, 11 Jun 2016 22:45:37 +0300
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Subject: [PATCH] Forward port mips & arm memory barrier patches
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Upstream-Status: Pending
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Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
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---
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lib/util/util.h | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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diff --git a/lib/util/util.h b/lib/util/util.h
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index 591722d..0768056 100644
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--- a/lib/util/util.h
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+++ b/lib/util/util.h
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@@ -29,4 +29,19 @@
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#define read_barrier() asm volatile("" ::: "memory")
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#endif
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+#ifdef __arm__
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+/*
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+ * Use the __kuser_memory_barrier helper in the CPU helper page. See
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+ * arch/arm/kernel/entry-armv.S in the kernel source for details.
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+ */
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+#define read_barrier() ((void(*)(void))0xffff0fa0)()
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+#endif
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+
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+#ifdef __mips__
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+#define read_barrier() asm volatile(".set mips2\n\t" \
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+ "sync\n\t" \
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+ ".set mips0" ::: "memory")
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+#endif
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+
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+
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#endif /* SP_UTIL_H */
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--
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2.1.4
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