Introduce CONFIG_GENERIC_IO

There are situations where CONFIG_HAS_IOMEM is too restrictive.
For example CONFIG_MTD_NAND_NANDSIM depends on CONFIG_HAS_IOMEM
but it works perfectly fine if an architecture without io memory
just includes asm-generic/io.h or implements everything defined in it.
UML is such a corner case.

Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index 028aba9e72a..ed7ca8ef4f9 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -29,6 +29,10 @@ config GENERIC_IOMAP
         bool
         select GENERIC_PCI_IOMAP
 
+config GENERIC_IO
+        boolean
+        default n
+
 config CRC_CCITT
         tristate "CRC-CCITT functions"
         help
@@ -224,6 +228,7 @@ config BTREE
 config HAS_IOMEM
         boolean
         depends on !NO_IOMEM
+        select GENERIC_IO
         default y
 
 config HAS_IOPORT