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lockup_detector: Introduce CONFIG_HARDLOCKUP_DETECTOR

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This new config is deemed to simplify even more the lockup detector
dependencies and can make it easier to bring a smooth sorting
between archs that support the new generic lockup detector and those
that still have their own, especially for those that are in the
middle of this migration.

Instead of checking whether we have CONFIG_LOCKUP_DETECTOR +
CONFIG_PERF_EVENTS_NMI each time an arch wants to know if it needs
to build its own lockup detector, take a shortcut with this new
config. It is enabled only if the hardlockup detection part of
the whole lockup detector is on.

Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Don Zickus <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
This commit is contained in:
Frederic Weisbecker 2010-05-15 23:15:20 +02:00
commit 23637d477c
4 changed files with 14 additions and 14 deletions
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4
arch/Kconfig
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@ -147,5 +147,9 @@ config HAVE_USER_RETURN_NOTIFIER
config HAVE_PERF_EVENTS_NMI
bool
help
System hardware can generate an NMI using the perf event
subsystem. Also has support for calculating CPU cycle events
to determine how many clock cycles in a given period.
source "kernel/gcov/Kconfig"