linux-kernel - [tip: locking/core] lockdep: Delete local_irq_enable_in

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Date:   Wed, 11 May 2022 19:39:47 -0000
From:   "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: locking/core] lockdep: Delete local_irq_enable_in_hardirq()

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     deaf7c4b4bf8b802cc465bb9b33fe6c76e812924
Gitweb:        https://git.kernel.org/tip/deaf7c4b4bf8b802cc465bb9b33fe6c76e812924
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Mon, 09 May 2022 21:03:43 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 11 May 2022 16:27:04 +02:00

lockdep: Delete local_irq_enable_in_hardirq()

No more users and there is no desire to grow new ones.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/8735hir0j4.ffs@tglx
---
 include/linux/interrupt.h | 18 ------------------
 1 file changed, 18 deletions(-)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index f40754c..b5e06a6 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -222,24 +222,6 @@ devm_request_any_context_irq(struct device *dev, unsigned int irq,
 
 extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id);
 
-/*
- * On lockdep we dont want to enable hardirqs in hardirq
- * context. Use local_irq_enable_in_hardirq() to annotate
- * kernel code that has to do this nevertheless (pretty much
- * the only valid case is for old/broken hardware that is
- * insanely slow).
- *
- * NOTE: in theory this might break fragile code that relies
- * on hardirq delivery - in practice we dont seem to have such
- * places left. So the only effect should be slightly increased
- * irqs-off latencies.
- */
-#ifdef CONFIG_LOCKDEP
-# define local_irq_enable_in_hardirq()	do { } while (0)
-#else
-# define local_irq_enable_in_hardirq()	local_irq_enable()
-#endif
-
 bool irq_has_action(unsigned int irq);
 extern void disable_irq_nosync(unsigned int irq);
 extern bool disable_hardirq(unsigned int irq);