1 files changed, 39 insertions, 2 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 7be4d3836745..d3a50967c337 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -302,13 +302,14 @@ 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"
@@ -933,6 +934,42 @@ 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