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