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-rw-r--r--arch/x86/include/asm/io.h2
-rw-r--r--arch/x86/include/asm/io_64.h2
-rw-r--r--arch/x86/kernel/pci-dma.c6
3 files changed, 0 insertions, 10 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 33513b9a67f..05cfed4485f 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -80,8 +80,6 @@ static inline void writeq(__u64 val, volatile void __iomem *addr)
#define readq readq
#define writeq writeq
-extern int iommu_bio_merge;
-
#ifdef CONFIG_X86_32
# include "io_32.h"
#else
diff --git a/arch/x86/include/asm/io_64.h b/arch/x86/include/asm/io_64.h
index fea325a1122..563c16270ba 100644
--- a/arch/x86/include/asm/io_64.h
+++ b/arch/x86/include/asm/io_64.h
@@ -232,8 +232,6 @@ void memset_io(volatile void __iomem *a, int b, size_t c);
#define flush_write_buffers()
-#define BIO_VMERGE_BOUNDARY iommu_bio_merge
-
/*
* Convert a virtual cached pointer to an uncached pointer
*/
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 12eeb4bfcde..da93c65f8f0 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -31,11 +31,6 @@ int no_iommu __read_mostly;
/* Set this to 1 if there is a HW IOMMU in the system */
int iommu_detected __read_mostly = 0;
-/* This tells the BIO block layer to assume merging. Default to off
- because we cannot guarantee merging later. */
-int iommu_bio_merge __read_mostly = 0;
-EXPORT_SYMBOL(iommu_bio_merge);
-
dma_addr_t bad_dma_address __read_mostly = 0;
EXPORT_SYMBOL(bad_dma_address);
@@ -189,7 +184,6 @@ static __init int iommu_setup(char *p)
}
if (!strncmp(p, "biomerge", 8)) {
- iommu_bio_merge = 4096;
iommu_merge = 1;
force_iommu = 1;
}