[tip: locking/urgent] preempt: Remove hardirq_disable_count()

[tip-bot2 for Boqun Feng]

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

Commit-ID:     95a5037ec202adb579f532afb6b35680001b564e
Gitweb:        https://git.kernel.org/tip/95a5037ec202adb579f532afb6b35680001b564e
Author:        Boqun Feng <boqun@xxxxxxxxxx>
AuthorDate:    Thu, 27 Aug 2026 12:48:35 -07:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxx>
CommitterDate: Sun, 30 Aug 2026 08:39:04 +02:00

preempt: Remove hardirq_disable_count()

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@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxx>
Link: https://patch.msgid.link/20260827194835.38968-1-boqun@xxxxxxxxxx
---
 include/linux/preempt.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/linux/preempt.h b/include/linux/preempt.h
index 8299657..6d2fedb 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)