diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-08-11 15:31:31 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2012-04-10 14:33:55 -0400 |
| commit | 8c40eceb3d91acc30fbd035de582d97a1a72aba7 (patch) | |
| tree | 655eb44f0c649788a68f5eb3905f3e2810f5c299 /include | |
| parent | 32c069f7bc6e971bfd7acf37cb8be7252abb62d6 (diff) | |
mm: pagefault_disabled()
Wrap the test for pagefault_disabled() into a helper, this allows us
to remove the need for current->pagefault_disabled on !-rt kernels.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-3yy517m8zsi9fpsf14xfaqkw@git.kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index bce86f9cf6b7..8cb4365720d5 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -91,6 +91,7 @@ struct sched_param { #include <linux/latencytop.h> #include <linux/cred.h> #include <linux/llist.h> +#include <linux/hardirq.h> #include <asm/processor.h> @@ -1435,7 +1436,9 @@ struct task_struct { /* mutex deadlock detection */ struct mutex_waiter *blocked_on; #endif +#ifdef CONFIG_PREEMPT_RT_FULL int pagefault_disabled; +#endif #ifdef CONFIG_TRACE_IRQFLAGS unsigned int irq_events; unsigned long hardirq_enable_ip; @@ -1584,6 +1587,17 @@ struct task_struct { /* Future-safe accessor for struct task_struct's cpus_allowed. */ #define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed) +#ifdef CONFIG_PREEMPT_RT_FULL +static inline bool cur_pf_disabled(void) { return current->pagefault_disabled; } +#else +static inline bool cur_pf_disabled(void) { return false; } +#endif + +static inline bool pagefault_disabled(void) +{ + return in_atomic() || cur_pf_disabled(); +} + /* * Priority of a process goes from 0..MAX_PRIO-1, valid RT * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH |