From: Boqun Feng <boqun@kernel.org>
To: tglx@kernel.org
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>,
Lyude Paul <lyude@redhat.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Joel Fernandes <joelagnelf@nvidia.com>,
linux-kernel@vger.kernel.org, Boqun Feng <boqun@kernel.org>
Subject: [PATCH] preempt: Remove hardirq_disable_count()
Date: Thu, 27 Aug 2026 12:48:35 -0700 [thread overview]
Message-ID: <20260827194835.38968-1-boqun@kernel.org> (raw)
In-Reply-To: <20260827181106.30090-1-boqun@kernel.org>
It turns out the previous usage of hardirq_disable_count() in
__irq_exit_rcu() would cause softirq pending issues. Without that usage,
hardirq_disable_count() doesn't need to exist, so remove it.
Signed-off-by: Boqun Feng <boqun@kernel.org>
---
include/linux/preempt.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/include/linux/preempt.h b/include/linux/preempt.h
index 8299657f0f86..6d2fedbd6758 100644
--- a/include/linux/preempt.h
+++ b/include/linux/preempt.h
@@ -168,7 +168,6 @@ static __always_inline unsigned char interrupt_context_level(void)
#define in_softirq() (softirq_count())
#define in_interrupt() (irq_count())
-#define hardirq_disable_count() ((preempt_count() & HARDIRQ_DISABLE_MASK) >> HARDIRQ_DISABLE_SHIFT)
#define hardirq_disable_enter() __preempt_count_add_return(HARDIRQ_DISABLE_OFFSET)
#define hardirq_disable_exit() __preempt_count_sub_return(HARDIRQ_DISABLE_OFFSET)
--
2.50.1 (Apple Git-155)
next prev parent reply other threads:[~2026-08-27 19:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-27 18:10 [PATCH] interrupt: Disable interrupt before modifying hardirq_disable counter Boqun Feng
2026-08-27 19:48 ` Boqun Feng [this message]
2026-08-27 20:07 ` Bradley Morgan
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