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50 lines
1.6 KiB
50 lines
1.6 KiB
From ed5fa92bfb82b9f3c66b8248825109dd91419156 Mon Sep 17 00:00:00 2001 |
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From: Jarod Wilson <jarod@redhat.com> |
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Date: Tue, 19 Jul 2016 18:39:46 -0400 |
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Subject: [PATCH] Revert "Fail compiles if no platform specific memory barriers |
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exist" |
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This reverts commit 20e2daec4578c1df10d8b599bf3b525a9b3fc6c3. |
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commit 20e2daec4578c1df10d8b599bf3b525a9b3fc6c3 |
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Author: Steve Wise <swise@opengridcomputing.com> |
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Date: Tue Jun 7 07:42:47 2016 -0700 |
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Fail compiles if no platform specific memory barriers exist |
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Currently there is a "generic" implementation for the memory barrier |
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macros in arch.h. These turned out to be insuffient for ARM64 causing |
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memory corruption problems when doing RDMA operations. So going forward, |
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fail a compile on a platform w/o platform-specific memory barrier macros. |
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Signed-off-by: Steve Wise <swise@opengridcomputing.com> |
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Signed-off-by: Doug Ledford <dledford@redhat.com> |
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Compiles where things worked just fine before (at least s390) now fail. |
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Signed-off-by: Jarod Wilson <jarod@redhat.com> |
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--- |
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include/infiniband/arch.h | 7 ++++++- |
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1 file changed, 6 insertions(+), 1 deletion(-) |
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diff --git a/include/infiniband/arch.h b/include/infiniband/arch.h |
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index e35ecf0..c31dd0a 100644 |
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--- a/include/infiniband/arch.h |
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+++ b/include/infiniband/arch.h |
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@@ -132,7 +132,12 @@ static inline uint64_t ntohll(uint64_t x) { return x; } |
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#else |
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-#error No architecture specific memory barrier defines found! |
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+#warning No architecture specific defines found. Using generic implementation. |
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+ |
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+#define mb() asm volatile("" ::: "memory") |
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+#define rmb() mb() |
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+#define wmb() mb() |
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+#define wc_wmb() wmb() |
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#endif |
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-- |
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1.8.3.1 |
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