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From 2f4631e0b8131544cc827aa0a517fc0b8fba79f6 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 9 Mar 2021 09:42:07 +0100
Subject: [PATCH 135/323] tasklets: Use spin wait in tasklet_disable()
temporarily
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.215-rt107.tar.xz
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>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/interrupt.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index abba3eff4f86a..fe085c46f2107 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();
}
--
2.44.0
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