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preempt: Remove hardirq_disable_count()

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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.

Also move hardirq_disable_enter/exit() into the Rust specific interrupt_rc
header.

[ tglx: Move the helpers over ]

Signed-off-by: Boqun Feng <boqun@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260827194835.38968-1-boqun@kernel.org
This commit is contained in:
Boqun Feng 2026-08-27 12:48:35 -07:00 committed by Thomas Gleixner
parent a155ac8f0c
commit 2af470916a
2 changed files with 3 additions and 4 deletions
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3
include/linux/interrupt_rc.h
View File

@ -52,6 +52,9 @@ extern void _local_interrupt_save_state(unsigned long flags);
extern void _local_interrupt_enable(void);
#endif /* !MODULE */
#define hardirq_disable_enter() __preempt_count_add_return(HARDIRQ_DISABLE_OFFSET)
#define hardirq_disable_exit() __preempt_count_sub_return(HARDIRQ_DISABLE_OFFSET)
static inline void local_interrupt_disable(void)
{
int new_count;

4
include/linux/preempt.h
View File

@ -168,10 +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)
/*
* The preempt_count offset after preempt_disable();
*/