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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 06:30:57 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 06:30:57 -0400 |
| commit | afa3536be88b435a057cb727b48fd3d760a497d2 (patch) | |
| tree | 8562d3c8327286746ae835ef8eb39d4494a1054d /kernel/irq_work.c | |
| parent | 35a9ad8af0bb0fa3525e6d0d20e32551d226f38e (diff) | |
| parent | 9b01f5bf3999a3db5b1bbd9fdfd80d8d304e94ee (diff) | |
Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
"Main changes:
- Fix the deadlock reported by Dave Jones et al
- Clean up and fix nohz_full interaction with arch abilities
- nohz init code consolidation/cleanup"
* 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
nohz: nohz full depends on irq work self IPI support
nohz: Consolidate nohz full init code
arm64: Tell irq work about self IPI support
arm: Tell irq work about self IPI support
x86: Tell irq work about self IPI support
irq_work: Force raised irq work to run on irq work interrupt
irq_work: Introduce arch_irq_work_has_interrupt()
nohz: Move nohz full init call to tick init
Diffstat (limited to 'kernel/irq_work.c')
| -rw-r--r-- | kernel/irq_work.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/kernel/irq_work.c b/kernel/irq_work.c index e6bcbe756663..385b85aded19 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -115,8 +115,10 @@ bool irq_work_needs_cpu(void) raised = &__get_cpu_var(raised_list); lazy = &__get_cpu_var(lazy_list); - if (llist_empty(raised) && llist_empty(lazy)) - return false; + + if (llist_empty(raised) || arch_irq_work_has_interrupt()) + if (llist_empty(lazy)) + return false; /* All work should have been flushed before going offline */ WARN_ON_ONCE(cpu_is_offline(smp_processor_id())); @@ -171,6 +173,15 @@ void irq_work_run(void) } EXPORT_SYMBOL_GPL(irq_work_run); +void irq_work_tick(void) +{ + struct llist_head *raised = &__get_cpu_var(raised_list); + + if (!llist_empty(raised) && !arch_irq_work_has_interrupt()) + irq_work_run_list(raised); + irq_work_run_list(&__get_cpu_var(lazy_list)); +} + /* * Synchronize against the irq_work @entry, ensures the entry is not * currently in use. |