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powerpc: Remove dead BIO_VMERGE_BOUNDARY definition 

The block layer dropped the virtual merge feature
(b8b3e16cfe).  BIO_VMERGE_BOUNDARY
definition is meaningless now (For POWER, BIO_VMERGE_BOUNDARY has been
meaningless for a long time since POWER disables the virtual merge
feature).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
FUJITA Tomonori 2008-12-13 17:44:59 +00:00 committed by Paul Mackerras
parent 7fe519c207
commit 3045b3cb0b
1 changed files with 0 additions and 7 deletions
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7
arch/powerpc/include/asm/io.h
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@ -713,13 +713,6 @@ static inline void * phys_to_virt(unsigned long address)
*/
#define page_to_phys(page) ((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT)
/* We do NOT want virtual merging, it would put too much pressure on
* our iommu allocator. Instead, we want drivers to be smart enough
* to coalesce sglists that happen to have been mapped in a contiguous
* way by the iommu
*/
#define BIO_VMERGE_BOUNDARY 0
/*
* 32 bits still uses virt_to_bus() for it's implementation of DMA
* mappings se we have to keep it defined here. We also have some old