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x86: remove dead BIO_VMERGE_BOUNDARY definition 

Impact: cleanup, remove dead code

The block layer dropped the virtual merge feature
(b8b3e16cfe).

BIO_VMERGE_BOUNDARY definition is meaningless now.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
FUJITA Tomonori 2008-12-03 14:53:04 +09:00 committed by Ingo Molnar
parent 6083aa485c
commit 181de82ee3
3 changed files with 0 additions and 10 deletions
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2
arch/x86/include/asm/io.h
View File

@ -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

2
arch/x86/include/asm/io_64.h
View File

@ -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
*/

6
arch/x86/kernel/pci-dma.c
View File

@ -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;
}