From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 9 Mar 2021 08:42:07 +0000 (+0100)
Subject: tasklets: Use spin wait in tasklet_disable() temporarily
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b0cd02c2a9494dbf0a1cc7dc7a3b8b400c158d37;p=linux.git

tasklets: Use spin wait in tasklet_disable() temporarily

To ease the transition use spin waiting in tasklet_disable() until all
usage sites from atomic context have been cleaned up.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210309084241.685352806@linutronix.de
---

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 3c8a29176258f..b7f00121f1244 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -728,7 +728,8 @@ static inline void tasklet_disable_in_atomic(struct tasklet_struct *t)
 static inline void tasklet_disable(struct tasklet_struct *t)
 {
 	tasklet_disable_nosync(t);
-	tasklet_unlock_wait(t);
+	/* Spin wait until all atomic users are converted */
+	tasklet_unlock_spin_wait(t);
 	smp_mb();
 }