1 files changed, 55 insertions, 13 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 7be4d3836745..1ce05a4cb5f6 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -16,6 +16,11 @@ config DEFCONFIG_LIST
         default "$ARCH_DEFCONFIG"
         default "arch/$ARCH/defconfig"
 
+config CONSTRUCTORS
+        bool
+        depends on !UML
+        default y
+
 menu "General setup"
 
 config EXPERIMENTAL
@@ -302,13 +307,14 @@ config AUDITSYSCALL
 
 config AUDIT_TREE
         def_bool y
-        depends on AUDITSYSCALL && INOTIFY
+        depends on AUDITSYSCALL
+        select INOTIFY
 
 menu "RCU Subsystem"
 
 choice
         prompt "RCU Implementation"
-        default CLASSIC_RCU
+        default TREE_RCU
 
 config CLASSIC_RCU
         bool "Classic RCU"
@@ -615,13 +621,13 @@ config SYSFS_DEPRECATED
         bool
 
 config SYSFS_DEPRECATED_V2
-        bool "Create deprecated sysfs layout for older userspace tools"
+        bool "remove sysfs features which may confuse old userspace tools"
         depends on SYSFS
-        default y
+        default n
         select SYSFS_DEPRECATED
         help
           This option switches the layout of sysfs to the deprecated
-          version.
+          version. Do not use it on recent distributions.
 
           The current sysfs layout features a unified device tree at
           /sys/devices/, which is able to express a hierarchy between
@@ -808,14 +814,6 @@ config KALLSYMS_EXTRA_PASS
            you wait for kallsyms to be fixed.
 
 
-config STRIP_ASM_SYMS
-        bool "Strip assembler-generated symbols during link"
-        default n
-        help
-          Strip internal assembler-generated symbols during a link (symbols
-          that look like '.Lxxx') so they don't pollute the output of
-          get_wchan() and suchlike.
-
 config HOTPLUG
         bool "Support for hot-pluggable devices" if EMBEDDED
         default y
@@ -933,6 +931,42 @@ config AIO
           by some high performance threaded applications. Disabling
           this option saves about 7k.
 
+config HAVE_PERF_COUNTERS
+        bool
+        help
+          See tools/perf/design.txt for details.
+
+menu "Performance Counters"
+
+config PERF_COUNTERS
+        bool "Kernel Performance Counters"
+        depends on HAVE_PERF_COUNTERS
+        select ANON_INODES
+        help
+          Enable kernel support for performance counter hardware.
+
+          Performance counters are special hardware registers available
+          on most modern CPUs. These registers count the number of certain
+          types of hw events: such as instructions executed, cachemisses
+          suffered, or branches mis-predicted - without slowing down the
+          kernel or applications. These registers can also trigger interrupts
+          when a threshold number of events have passed - and can thus be
+          used to profile the code that runs on that CPU.
+
+          The Linux Performance Counter subsystem provides an abstraction of
+          these hardware capabilities, available via a system call. It
+          provides per task and per CPU counters, and it provides event
+          capabilities on top of those.
+
+          Say Y if unsure.
+
+config EVENT_PROFILE
+        bool "Tracepoint profile sources"
+        depends on PERF_COUNTERS && EVENT_TRACER
+        default y
+
+endmenu
+
 config VM_EVENT_COUNTERS
         default y
         bool "Enable VM event counters for /proc/vmstat" if EMBEDDED
@@ -961,6 +995,14 @@ config SLUB_DEBUG
           SLUB sysfs support. /sys/slab will not exist and there will be
           no support for cache validation etc.
 
+config STRIP_ASM_SYMS
+        bool "Strip assembler-generated symbols during link"
+        default n
+        help
+          Strip internal assembler-generated symbols during a link (symbols
+          that look like '.Lxxx') so they don't pollute the output of
+          get_wchan() and suchlike.
+
 config COMPAT_BRK
         bool "Disable heap randomization"
         default y