[uml-devel] [PATCH 7/9] uml: arch Kconfig menu cleanups

["Paolo 'Blaisorblade' Giarrusso" <blaisorblade@yahoo.it>]

*) 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>
---

 arch/um/Kconfig      |   27 ++++++++++++++-------------
 arch/um/Kconfig.i386 |    6 +++++-
 drivers/net/Kconfig  |    1 +
 3 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 8ff3bcb..5982fe2 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 c71b39a..ef79ed2 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
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 1421941..c0f9351 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -7,6 +7,7 @@ menu "Network device support"
 
 config NETDEVICES
 	depends on NET
+	default y if UML
 	bool "Network device support"
 	---help---
 	  You can say N here if you don't intend to connect your Linux box to



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