[PATCH] uml: arch Kconfig menu cleanups

*) mark as "EXPERIMENTAL" various items that either aren't very stable or
   that are actively crashing the setup of users which don't really need them
   (i.e.  HIGHMEM and 3-level pagetables on x86 - nobody needs either,
   everybody reports "I'm using it and getting trouble").

*) move net/Kconfig near to the rest of network configurations, and
   drivers/block/Kconfig near "Block layer" submenu.

*) it's useless and doesn't work well to force NETDEVICES on and to disable
   the prompt like it's done.  Better remove the attempt, and change that to a
   simple "default y if UML".

*) drop the warning about "report problems about HPPFS" - it's redundant
   anyway, as that's the usual procedure, and HPPFS users are especially
   technical (i.e.  they know reporting bugs is _good_).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 19 insertions, 14 deletions

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 8ff3bcbce5fc..5982fe2753e0 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -143,6 +143,7 @@ config HOSTFS
 
 config HPPFS
         tristate "HoneyPot ProcFS (EXPERIMENTAL)"
+        depends on EXPERIMENTAL
         help
         hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
         entries to be overridden, removed, or fabricated from the host.
@@ -155,10 +156,6 @@ config HPPFS
         You only need this if you are setting up a UML honeypot.  Otherwise,
         it is safe to say 'N' here.
 
-        If you are actively using it, please report any problems, since it's
-        getting fixed. In this moment, it is experimental on 2.6 (it works on
-        2.4).
-
 config MCONSOLE
         bool "Management console"
         default y
@@ -243,8 +240,16 @@ config NEST_LEVEL
         Only change this if you are running nested UMLs.
 
 config HIGHMEM
-        bool "Highmem support"
-        depends on !64BIT
+        bool "Highmem support (EXPERIMENTAL)"
+        depends on !64BIT && EXPERIMENTAL
+        default n
+        help
+        This was used to allow UML to run with big amounts of memory.
+        Currently it is unstable, so if unsure say N.
+
+        To use big amounts of memory, it is recommended to disable TT mode (i.e.
+        CONFIG_MODE_TT) and enable static linking (i.e. CONFIG_STATIC_LINK) -
+        this should allow the guest to use up to 2.75G of memory.
 
 config KERNEL_STACK_ORDER
         int "Kernel stack size order"
@@ -269,17 +274,13 @@ endmenu
 
 source "init/Kconfig"
 
-source "net/Kconfig"
-
-source "drivers/base/Kconfig"
+source "drivers/block/Kconfig"
 
 source "arch/um/Kconfig.char"
 
-source "drivers/block/Kconfig"
+source "drivers/base/Kconfig"
 
-config NETDEVICES
-        bool
-        default NET
+source "net/Kconfig"
 
 source "arch/um/Kconfig.net"
 
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386
index c71b39a677aa..ef79ed25aecd 100644
--- a/arch/um/Kconfig.i386
+++ b/arch/um/Kconfig.i386
@@ -22,13 +22,17 @@ config TOP_ADDR
         default 0x80000000 if HOST_2G_2G
 
 config 3_LEVEL_PGTABLES
-        bool "Three-level pagetables"
+        bool "Three-level pagetables (EXPERIMENTAL)"
         default n
+        depends on EXPERIMENTAL
         help
         Three-level pagetables will let UML have more than 4G of physical
         memory.  All the memory that can't be mapped directly will be treated
         as high memory.
 
+        However, this it experimental on 32-bit architectures, so if unsure say
+        N (on x86-64 it's automatically enabled, instead, as it's safe there).
+
 config STUB_CODE
         hex
         default 0xbfffe000