Add some help texts to recently-introduced kconfig items

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (edited MACINTOSH_DRIVERS per Geert Uytterhoeven's remark)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/i386/Kconfig

@@ -1228,6 +1228,11 @@ menuconfig INSTRUMENTATION
 	bool "Instrumentation Support"
 	depends on EXPERIMENTAL
 	default y
+	---help---
+	  Say Y here to get to see options related to performance measurement,
+	  debugging, and testing. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if INSTRUMENTATION
 

drivers/atm/Kconfig

@@ -6,6 +6,11 @@ menuconfig ATM_DRIVERS
 	bool "ATM drivers"
 	depends on NETDEVICES && ATM
 	default y
+	---help---
+	  Say Y here to get to see options for Asynchronous Transfer Mode
+	  device drivers. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if ATM_DRIVERS && NETDEVICES && ATM
 

drivers/auxdisplay/Kconfig

@@ -8,6 +8,11 @@
 menuconfig AUXDISPLAY
 	depends on PARPORT
 	bool "Auxiliary Display support"
+	---help---
+	  Say Y here to get to see options for auxiliary display drivers.
+	  This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if AUXDISPLAY && PARPORT
 

drivers/block/Kconfig

@@ -6,6 +6,12 @@ menuconfig BLK_DEV
 	bool "Block devices"
 	depends on BLOCK
 	default y
+	---help---
+	  Say Y here to get to see options for various different block device
+	  drivers. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled;
+	  only do this if you know what you are doing.
 
 if BLK_DEV
 

drivers/crypto/Kconfig

@@ -2,6 +2,11 @@
 menuconfig CRYPTO_HW
 	bool "Hardware crypto devices"
 	default y
+	---help---
+	  Say Y here to get to see options for hardware crypto devices and
+	  processors. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if CRYPTO_HW
 

drivers/hid/Kconfig

@@ -5,6 +5,11 @@ menuconfig HID_SUPPORT
 	bool "HID Devices"
 	depends on INPUT
 	default y
+	---help---
+	  Say Y here to get to see options for various computer-human interface
+	  device drivers. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if HID_SUPPORT
 

drivers/kvm/Kconfig

@@ -5,6 +5,11 @@ menuconfig VIRTUALIZATION
 	bool "Virtualization"
 	depends on X86
 	default y
+	---help---
+	  Say Y here to get to see options for virtualization guest drivers.
+	  This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if VIRTUALIZATION
 

drivers/macintosh/Kconfig

@@ -3,6 +3,11 @@ menuconfig MACINTOSH_DRIVERS
 	bool "Macintosh device drivers"
 	depends on PPC || MAC || X86
 	default y if (PPC_PMAC || MAC)
+	---help---
+	  Say Y here to get to see options for devices used with Macintosh
+	  computers. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if MACINTOSH_DRIVERS
 

drivers/misc/Kconfig

@@ -5,6 +5,11 @@
 menuconfig MISC_DEVICES
 	bool "Misc devices"
 	default y
+	---help---
+	  Say Y here to get to see options for device drivers from various
+	  different categories. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if MISC_DEVICES
 

drivers/net/Kconfig

@@ -1968,6 +1968,16 @@ menuconfig NETDEV_1000
 	bool "Ethernet (1000 Mbit)"
 	depends on !UML
 	default y
+	---help---
+	  Ethernet (also called IEEE 802.3 or ISO 8802-2) is the most common
+	  type of Local Area Network (LAN) in universities and companies.
+
+	  Say Y here to get to see options for Gigabit Ethernet drivers.
+	  This option alone does not add any kernel code.
+	  Note that drivers supporting both 100 and 1000 MBit may be listed
+	  under "Ethernet (10 or 100MBit)" instead.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if NETDEV_1000
 
@@ -2339,6 +2349,11 @@ menuconfig NETDEV_10000
 	bool "Ethernet (10000 Mbit)"
 	depends on !UML
 	default y
+	---help---
+	  Say Y here to get to see options for 10 Gigabit Ethernet drivers.
+	  This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if NETDEV_10000
 

drivers/usb/Kconfig

@@ -6,6 +6,9 @@ menuconfig USB_SUPPORT
 	bool "USB support"
 	depends on HAS_IOMEM
 	default y
+	---help---
+	  This option adds core support for Universal Serial Bus (USB).
+	  You will also need drivers from the following menu to make use of it.
 
 if USB_SUPPORT