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[POWERPC] IOMMU virtual merge is no longer experimental

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Per conversations with BenH, IOMMU virtual merging should no longer
be considered to be an "experimental" feature.  In particular,
CONFIG_VMERGE has been set to "y" in the defconfigs for quite a while.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

----
 arch/powerpc/Kconfig |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Linas Vepstas 2007-07-18 02:09:35 +10:00 committed by Paul Mackerras
parent b2315372ea
commit 768cc2d3b2
1 changed files with 6 additions and 5 deletions
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11
arch/powerpc/Kconfig
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@ -181,16 +181,17 @@ config MATH_EMULATION
instructions to run.
config IOMMU_VMERGE
bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
depends on EXPERIMENTAL && PPC64
default n
bool "Enable IOMMU virtual merging"
depends on PPC64
default y
help
Cause IO segments sent to a device for DMA to be merged virtually
by the IOMMU when they happen to have been allocated contiguously.
This doesn't add pressure to the IOMMU allocator. However, some
drivers don't support getting large merged segments coming back
from *_map_sg(). Say Y if you know the drivers you are using are
properly handling this case.
from *_map_sg().
Most drivers don't have this problem; it is safe to say Y here.
config HOTPLUG_CPU
bool "Support for enabling/disabling CPUs"