documentation: fix almost duplicate filenames (IO/io-mapping.txt)

Having both IO-mapping.txt and io-mapping.txt in Documentation/
was confusing and/or bothersome to some people, so rename
IO-mapping.txt to bus-virt-phys-mapping.txt.  Also update
Documentation/00-INDEX for both of these files.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Kees Bakker <kees.bakker@xs4all.nl>
Cc: Keith Packard <keithp@keithp.com>

2 files changed, 4 insertions, 2 deletions

diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
index dd10b51b4e65..5405f7aecefc 100644
--- a/Documentation/00-INDEX
+++ b/Documentation/00-INDEX
@@ -32,8 +32,6 @@ DocBook/
         - directory with DocBook templates etc. for kernel documentation.
 HOWTO
         - the process and procedures of how to do Linux kernel development.
-IO-mapping.txt
-        - how to access I/O mapped memory from within device drivers.
 IPMI.txt
         - info on Linux Intelligent Platform Management Interface (IPMI) Driver.
 IRQ-affinity.txt
@@ -84,6 +82,8 @@ blockdev/
         - info on block devices & drivers
 btmrvl.txt
         - info on Marvell Bluetooth driver usage.
+bus-virt-phys-mapping.txt
+        - how to access I/O mapped memory from within device drivers.
 cachetlb.txt
         - describes the cache/TLB flushing interfaces Linux uses.
 cdrom/
@@ -168,6 +168,8 @@ initrd.txt
         - how to use the RAM disk as an initial/temporary root filesystem.
 input/
         - info on Linux input device support.
+io-mapping.txt
+        - description of io_mapping functions in linux/io-mapping.h
 io_ordering.txt
         - info on ordering I/O writes to memory-mapped addresses.
 ioctl/
diff --git a/Documentation/IO-mapping.txt b/Documentation/bus-virt-phys-mapping.txt
index 1b5aa10df845..1b5aa10df845 100644
--- a/Documentation/IO-mapping.txt
+++ b/Documentation/bus-virt-phys-mapping.txt