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[PATCH] [54/66] x86_64: Make GART_IOMMU kconfig help text more specific (trivial)



From: Jon Mason <jdmason@xxxxxxxxxx>
Have the GART_IOMMU help text specify that this is the hardware IOMMU in
amd64 processors.  This will be significant if/when other IOMMUs are
added to the x86-64 architecture. :-)

Also, note that the previous help text stated that IOMMU was needed for
>3GB memory instead of >4GB.  This is fixed in the newer version.

Thanks,
Jon

Signed-off-by: Jon Mason <jdmason@xxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxx>

---
 arch/x86_64/Kconfig |   16 +++++++++-------
 1 files changed, 9 insertions(+), 7 deletions(-)

Index: linux/arch/x86_64/Kconfig
===================================================================
--- linux.orig/arch/x86_64/Kconfig
+++ linux/arch/x86_64/Kconfig
@@ -364,13 +364,15 @@ config GART_IOMMU
 	select SWIOTLB
 	depends on PCI
 	help
-	  Support the IOMMU. Needed to run systems with more than 3GB of memory
-	  properly with 32-bit PCI devices that do not support DAC (Double Address
-	  Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter.
-	  Normally the kernel will take the right choice by itself.
-	  This option includes a driver for the AMD Opteron/Athlon64 northbridge IOMMU
-	  and a software emulation used on other systems.
-	  If unsure, say Y.
+	  Support for hardware IOMMU in AMD's Opteron/Athlon64 Processors
+	  and for the bounce buffering software IOMMU.
+	  Needed to run systems with more than 3GB of memory properly with
+	  32-bit PCI devices that do not support DAC (Double Address Cycle).
+	  The IOMMU can be turned off at runtime with the iommu=off parameter.
+  	  Normally the kernel will take the right choice by itself.
+  	  This option includes a driver for the AMD Opteron/Athlon64 IOMMU
+  	  northbridge and a software emulation used on other systems without
+	  hardware IOMMU.  If unsure, say Y.
 
 # need this always enabled with GART_IOMMU for the VIA workaround
 config SWIOTLB
-
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