diff options
| author |   Frederic Weisbecker <frederic@kernel.org> | 2019-11-08 17:08:55 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-11-11 09:02:56 +0100 |
| commit | 153bedbac2ebd475e1c7c2d2fa0c042f5525927d (patch) | |
| tree | 80be4ee2af1d7aa3cc52be50c225f32002dd2dad /include/linux/irq_work.h | |
| parent | Linux 5.4-rc7 (diff) | |
| download | wireguard-linux-153bedbac2ebd475e1c7c2d2fa0c042f5525927d.tar.xz wireguard-linux-153bedbac2ebd475e1c7c2d2fa0c042f5525927d.zip | |
irq_work: Convert flags to atomic_t
We need to convert flags to atomic_t in order to later fix an ordering
issue on atomic_cmpxchg() failure. This will allow us to use atomic_fetch_or().
Also clarify the nature of those flags.
[ mingo: Converted two more usage site the original patch missed. ]
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191108160858.31665-2-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/irq_work.h')
| -rw-r--r-- | include/linux/irq_work.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h index b11fcdfd0770..02da997ad12c 100644 --- a/include/linux/irq_work.h +++ b/include/linux/irq_work.h @@ -22,7 +22,7 @@ #define IRQ_WORK_CLAIMED (IRQ_WORK_PENDING | IRQ_WORK_BUSY) struct irq_work { - unsigned long flags; + atomic_t flags; struct llist_node llnode; void (*func)(struct irq_work *); }; @@ -30,11 +30,15 @@ struct irq_work { static inline void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *)) { - work->flags = 0; + atomic_set(&work->flags, 0); work->func = func; } -#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), } +#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { \ + .flags = ATOMIC_INIT(0), \ + .func = (_f) \ +} + bool irq_work_queue(struct irq_work *work); bool irq_work_queue_on(struct irq_work *work, int cpu); |