cs5535: CS5535_MFGPT_DEFAULT_IRQ should depend on CS5535_MFGPT

[sfrench/cifs-2.6.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index 54c655ce9c049f56da32c4157917e0b6caffd48f..a23da9f0180341dd0cb8809f6108a2911336897a 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1079,6 +1079,28 @@ config SLOB
 
 endchoice
 
+config MMAP_ALLOW_UNINITIALIZED
+       bool "Allow mmapped anonymous memory to be uninitialized"
+       depends on EMBEDDED && !MMU
+       default n
+       help
+         Normally, and according to the Linux spec, anonymous memory obtained
+         from mmap() has it's contents cleared before it is passed to
+         userspace.  Enabling this config option allows you to request that
+         mmap() skip that if it is given an MAP_UNINITIALIZED flag, thus
+         providing a huge performance boost.  If this option is not enabled,
+         then the flag will be ignored.
+
+         This is taken advantage of by uClibc's malloc(), and also by
+         ELF-FDPIC binfmt's brk and stack allocator.
+
+         Because of the obvious security issues, this option should only be
+         enabled on embedded devices where you control what is run in
+         userspace.  Since that isn't generally a problem on no-MMU systems,
+         it is normally safe to say Y here.
+
+         See Documentation/nommu-mmap.txt for more information.
+
 config PROFILING
        bool "Profiling support (EXPERIMENTAL)"
        help