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-rw-r--r--kernel/irq_work.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/irq_work.c b/kernel/irq_work.c
index 1588e3b2871b..57be1a6cd8da 100644
--- a/kernel/irq_work.c
+++ b/kernel/irq_work.c
@@ -119,8 +119,11 @@ void irq_work_run(void)
/*
* Clear the PENDING bit, after this point the @work
* can be re-used.
+ * Make it immediately visible so that other CPUs trying
+ * to claim that work don't rely on us to handle their data
+ * while we are in the middle of the func.
*/
- work->flags = IRQ_WORK_BUSY;
+ xchg(&work->flags, IRQ_WORK_BUSY);
work->func(work);
/*
* Clear the BUSY bit and return to the free state if