diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-01-06 09:53:05 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-01-06 09:53:05 +0100 |
commit | 3d7a96f5a485b7d06c2379f343d7312af89ec9e2 (patch) | |
tree | 5f097f68eb0f9fd3fa4a10f38672e300e9127b10 /include/linux/stop_machine.h | |
parent | kmemtrace: Remove the relay version of kmemtrace (diff) | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm (diff) | |
download | linux-dev-3d7a96f5a485b7d06c2379f343d7312af89ec9e2.tar.xz linux-dev-3d7a96f5a485b7d06c2379f343d7312af89ec9e2.zip |
Merge branch 'linus' into tracing/kmemtrace2
Diffstat (limited to 'include/linux/stop_machine.h')
-rw-r--r-- | include/linux/stop_machine.h | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/include/linux/stop_machine.h b/include/linux/stop_machine.h index faf1519b5adc..baba3a23a814 100644 --- a/include/linux/stop_machine.h +++ b/include/linux/stop_machine.h @@ -23,7 +23,7 @@ * * This can be thought of as a very heavy write lock, equivalent to * grabbing every spinlock in the kernel. */ -int stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus); +int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus); /** * __stop_machine: freeze the machine on all CPUs and run this function @@ -34,11 +34,29 @@ int stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus); * Description: This is a special version of the above, which assumes cpus * won't come or go while it's being called. Used by hotplug cpu. */ -int __stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus); +int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus); + +/** + * stop_machine_create: create all stop_machine threads + * + * Description: This causes all stop_machine threads to be created before + * stop_machine actually gets called. This can be used by subsystems that + * need a non failing stop_machine infrastructure. + */ +int stop_machine_create(void); + +/** + * stop_machine_destroy: destroy all stop_machine threads + * + * Description: This causes all stop_machine threads which were created with + * stop_machine_create to be destroyed again. + */ +void stop_machine_destroy(void); + #else static inline int stop_machine(int (*fn)(void *), void *data, - const cpumask_t *cpus) + const struct cpumask *cpus) { int ret; local_irq_disable(); @@ -46,5 +64,9 @@ static inline int stop_machine(int (*fn)(void *), void *data, local_irq_enable(); return ret; } + +static inline int stop_machine_create(void) { return 0; } +static inline void stop_machine_destroy(void) { } + #endif /* CONFIG_SMP */ #endif /* _LINUX_STOP_MACHINE */ |