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-rw-r--r--include/asm-x86/io.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h
index bf5d629b3a39..a145210ac16b 100644
--- a/include/asm-x86/io.h
+++ b/include/asm-x86/io.h
@@ -73,6 +73,8 @@ build_mmio_write(__writeq, "q", unsigned long, "r", )
#define writeq writeq
#endif
+extern int iommu_bio_merge;
+
#ifdef CONFIG_X86_32
# include "io_32.h"
#else