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[PATCH 25/33] x86, pkeys: add Kconfig prompt to existing config option

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From: Dave Hansen <dave.hansen@linux.intel.com>

I don't have a strong opinion on whether we need this or not.
Protection Keys has relatively little code associated with it,
and it is not a heavyweight feature to keep enabled.  However,
I can imagine that folks would still appreciate being able to
disable it.

Here's the option if folks want it.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
---

 b/arch/x86/Kconfig |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff -puN arch/x86/Kconfig~pkeys-40-kconfig-prompt arch/x86/Kconfig
--- a/arch/x86/Kconfig~pkeys-40-kconfig-prompt	2016-02-12 10:44:25.134653590 -0800
+++ b/arch/x86/Kconfig	2016-02-12 10:44:25.138653773 -0800
@@ -1715,8 +1715,18 @@ config X86_INTEL_MPX
 	  If unsure, say N.
 
 config X86_INTEL_MEMORY_PROTECTION_KEYS
+	prompt "Intel Memory Protection Keys"
 	def_bool y
+	# Note: only available in 64-bit mode
 	depends on CPU_SUP_INTEL && X86_64
+	---help---
+	  Memory Protection Keys provides a mechanism for enforcing
+	  page-based protections, but without requiring modification of the
+	  page tables when an application changes protection domains.
+
+	  For details, see Documentation/x86/protection-keys.txt
+
+	  If unsure, say y.
 
 config EFI
 	bool "EFI runtime service support"
_

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[PATCH 25/33] x86, pkeys: add Kconfig prompt to existing config option Dave Hansen <dave@sr71.net> - 2016-02-12 22:10 +0100
  [tip:mm/pkeys] x86/mm/pkeys:   Add Kconfig prompt to existing config option tip-bot for Dave Hansen <tipbot@zytor.com> - 2016-02-18 21:30 +0100

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