LCOV - code coverage report
Current view: top level - include/linux - irq_work.h (source / functions) Hit Total Coverage
Test: landlock.info Lines: 3 5 60.0 %
Date: 2021-04-22 12:43:58 Functions: 0 0 -

          Line data    Source code
       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _LINUX_IRQ_WORK_H
       3             : #define _LINUX_IRQ_WORK_H
       4             : 
       5             : #include <linux/smp_types.h>
       6             : 
       7             : /*
       8             :  * An entry can be in one of four states:
       9             :  *
      10             :  * free      NULL, 0 -> {claimed}       : free to be used
      11             :  * claimed   NULL, 3 -> {pending}       : claimed to be enqueued
      12             :  * pending   next, 3 -> {busy}          : queued, pending callback
      13             :  * busy      NULL, 2 -> {free, claimed} : callback in progress, can be claimed
      14             :  */
      15             : 
      16             : struct irq_work {
      17             :         struct __call_single_node node;
      18             :         void (*func)(struct irq_work *);
      19             : };
      20             : 
      21             : #define __IRQ_WORK_INIT(_func, _flags) (struct irq_work){       \
      22             :         .node = { .u_flags = (_flags), },                       \
      23             :         .func = (_func),                                        \
      24             : }
      25             : 
      26             : #define IRQ_WORK_INIT(_func) __IRQ_WORK_INIT(_func, 0)
      27             : #define IRQ_WORK_INIT_LAZY(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_LAZY)
      28             : #define IRQ_WORK_INIT_HARD(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_HARD_IRQ)
      29             : 
      30             : #define DEFINE_IRQ_WORK(name, _f)                               \
      31             :         struct irq_work name = IRQ_WORK_INIT(_f)
      32             : 
      33             : static inline
      34          16 : void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
      35             : {
      36          16 :         *work = IRQ_WORK_INIT(func);
      37           4 : }
      38             : 
      39             : static inline bool irq_work_is_pending(struct irq_work *work)
      40             : {
      41             :         return atomic_read(&work->node.a_flags) & IRQ_WORK_PENDING;
      42             : }
      43             : 
      44           0 : static inline bool irq_work_is_busy(struct irq_work *work)
      45             : {
      46           0 :         return atomic_read(&work->node.a_flags) & IRQ_WORK_BUSY;
      47             : }
      48             : 
      49             : bool irq_work_queue(struct irq_work *work);
      50             : bool irq_work_queue_on(struct irq_work *work, int cpu);
      51             : 
      52             : void irq_work_tick(void);
      53             : void irq_work_sync(struct irq_work *work);
      54             : 
      55             : #ifdef CONFIG_IRQ_WORK
      56             : #include <asm/irq_work.h>
      57             : 
      58             : void irq_work_run(void);
      59             : bool irq_work_needs_cpu(void);
      60             : void irq_work_single(void *arg);
      61             : #else
      62             : static inline bool irq_work_needs_cpu(void) { return false; }
      63             : static inline void irq_work_run(void) { }
      64             : static inline void irq_work_single(void *arg) { }
      65             : #endif
      66             : 
      67             : #endif /* _LINUX_IRQ_WORK_H */

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