linux-kernel - [PATCH] powerpc: remove dead BIO_VMERGE

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Date:	Fri, 24 Oct 2008 14:41:09 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	linuxppc-dev@...abs.org
Cc:	paulus@...ba.org, benh@...nel.crashing.org, jens.axboe@...cle.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition

The block layer dropped the virtual merge feature
(b8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5). 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@....ntt.co.jp>
---
 arch/powerpc/include/asm/io.h |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 08266d2..494cd8b 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -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
-- 
1.5.4.2

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