These are available on other architectures, so add them on x86.
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/x86/include/asm/io.h | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 9b757d4..b12bdd8 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -234,4 +234,12 @@ static inline phys_addr_t virt_to_phys(void * vaddr)
return (phys_addr_t)(vaddr);
}
+/*
+ * TODO: The kernel offers some more advanced versions of barriers, it might
+ * have some advantages to use them instead of the simple one here.
+ */
+#define dmb() __asm__ __volatile__ ("" : : : "memory")
+#define __iormb() dmb()
+#define __iowmb() dmb()
+
#endif
--
1.7.3.1
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