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lockup_detector: Adapt CONFIG_PERF_EVENT_NMI to other archs

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CONFIG_PERF_EVENT_NMI is something that need to be enabled from the
arch. This is fine on x86 as PERF_EVENTS is builtin but if other
archs select it, they will need to handle the PERF_EVENTS dependency.

Instead, handle the dependency in the generic layer:

- archs need to tell what they support through HAVE_PERF_EVENTS_NMI
- Enable magically PERF_EVENTS_NMI if we have PERF_EVENTS and
  HAVE_PERF_EVENTS_NMI.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Frederic Weisbecker
2010-05-15 22:57:48 +02:00
parent e16bb1d7fe
commit c01d432330
3 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/Kconfig
View File

@@ -145,4 +145,7 @@ config HAVE_HW_BREAKPOINT
config HAVE_USER_RETURN_NOTIFIER config HAVE_USER_RETURN_NOTIFIER
bool bool
config HAVE_PERF_EVENTS_NMI
bool
source "kernel/gcov/Kconfig" source "kernel/gcov/Kconfig"

2
arch/x86/Kconfig
View File

@@ -54,7 +54,7 @@ config X86
select HAVE_KERNEL_LZO select HAVE_KERNEL_LZO
select HAVE_HW_BREAKPOINT select HAVE_HW_BREAKPOINT
select PERF_EVENTS select PERF_EVENTS
select PERF_EVENTS_NMI select HAVE_PERF_EVENTS_NMI
select ANON_INODES select ANON_INODES
select HAVE_ARCH_KMEMCHECK select HAVE_ARCH_KMEMCHECK
select HAVE_USER_RETURN_NOTIFIER select HAVE_USER_RETURN_NOTIFIER

3
init/Kconfig
View File

@@ -943,8 +943,7 @@ config PERF_USE_VMALLOC
See tools/perf/design.txt for details See tools/perf/design.txt for details
config PERF_EVENTS_NMI config PERF_EVENTS_NMI
bool def_bool PERF_EVENTS && HAVE_PERF_EVENTS_NMI
depends on PERF_EVENTS
help help
System hardware can generate an NMI using the perf event System hardware can generate an NMI using the perf event
subsystem. Also has support for calculating CPU cycle events subsystem. Also has support for calculating CPU cycle events