X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fia64%2Finclude%2Fasm%2Fio.h;h=0d9d16e2d94906345ecef8ac22b2dfd5ed20836c;hb=8b805ef617cf0e02f6d18b891f8deb6246421b01;hp=7f257507cd86f3b0a301bc69b9db51fb7cf6d2fa;hpb=e2858ce3ed519500e3b9af1c16c25250ff16cd5c;p=linux-2.6-omap-h63xx.git

diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index 7f257507cd8..0d9d16e2d94 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -434,28 +434,4 @@ extern void memset_io(volatile void __iomem *s, int c, long n);
 
 # endif /* __KERNEL__ */
 
-/*
- * Enabling BIO_VMERGE_BOUNDARY forces us to turn off I/O MMU bypassing.  It is said that
- * BIO-level virtual merging can give up to 4% performance boost (not verified for ia64).
- * On the other hand, we know that I/O MMU bypassing gives ~8% performance improvement on
- * SPECweb-like workloads on zx1-based machines.  Thus, for now we favor I/O MMU bypassing
- * over BIO-level virtual merging.
- */
-extern unsigned long ia64_max_iommu_merge_mask;
-#if 1
-#define BIO_VMERGE_BOUNDARY	0
-#else
-/*
- * It makes no sense at all to have this BIO_VMERGE_BOUNDARY macro here.  Should be
- * replaced by dma_merge_mask() or something of that sort.  Note: the only way
- * BIO_VMERGE_BOUNDARY is used is to mask off bits.  Effectively, our definition gets
- * expanded into:
- *
- *	addr & ((ia64_max_iommu_merge_mask + 1) - 1) == (addr & ia64_max_iommu_vmerge_mask)
- *
- * which is precisely what we want.
- */
-#define BIO_VMERGE_BOUNDARY	(ia64_max_iommu_merge_mask + 1)
-#endif
-
 #endif /* _ASM_IA64_IO_H */