tick: Document TICK_ONESHOT config option

[linux-2.6.git] / kernel / time / Kconfig

diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index 9ec54eb..a20dc8a 100644 (file)
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -1,15 +1,35 @@
 #
 # Timer subsystem related configuration options
 #
+
+# Core internal switch. Selected by NO_HZ / HIGH_RES_TIMERS. This is
+# only related to the tick functionality. Oneshot clockevent devices
+# are supported independ of this.
 config TICK_ONESHOT
        bool
-       default n
 
 config NO_HZ
        bool "Tickless System (Dynamic Ticks)"
-       depends on GENERIC_TIME && GENERIC_CLOCKEVENTS
+       depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
        select TICK_ONESHOT
        help
          This option enables a tickless system: timer interrupts will
          only trigger on an as-needed basis both when the system is
          busy and when the system is idle.
+
+config HIGH_RES_TIMERS
+       bool "High Resolution Timer Support"
+       depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
+       select TICK_ONESHOT
+       help
+         This option enables high resolution timer support. If your
+         hardware is not capable then this option only increases
+         the size of the kernel image.
+
+config GENERIC_CLOCKEVENTS_BUILD
+       bool
+       default y
+       depends on GENERIC_CLOCKEVENTS
+
+config GENERIC_CLOCKEVENTS_MIN_ADJUST
+       bool