read_seqlock_excl_irq(9)

👑 read_seqlock_excl_irq(9) 👑

okay bestie, this is the Kernel API Manual entry for read_seqlock_excl_irq — the one that starts a non-interruptible seqlock_t locking reader section. Slay. 💅

🎀 NAME 🎀

read_seqlock_excl_irq — starts a non-interruptible seqlock_t locking reader section. That's the whole vibe, no cap. ✨

🦋 SYNOPSIS 🦋

void read_seqlock_excl_irq (seqlock_t *sl );

🌸 ARGUMENTS 🌸

• sl — pointer to seqlock_t. This is the seqlock bestie you're passing in, and yes, keep that exact type. 🫶

🔥 DESCRIPTION 🔥

okay so this is the _irq variant of read_seqlock_excl. Use this only if the seqlock_t write side section, or other read sections, can be invoked from a hardirq context. The way that or other read sections is emphasized? iconic. Don't skip it. 💅

bestie, that "only if" is real: this is the _irq flavor, so it's for the hardirq-context situation described above. No inventing extra rules, fr fr. ⚠️

💜 SEE ALSO 💜

Kernel file: ./include/linux/seqlock.h. The whole squad is here:

• seqcount_init(9), SEQCNT_ZERO(9), __read_seqcount_begin(9), raw_read_seqcount_begin(9), read_seqcount_begin(9), raw_read_seqcount(9), raw_seqcount_try_begin(9), raw_seqcount_begin(9), __read_seqcount_retry(9), read_seqcount_retry(9), raw_write_seqcount_begin(9), raw_write_seqcount_end(9), write_seqcount_begin_nested(9), write_seqcount_begin(9), write_seqcount_end(9), raw_write_seqcount_barrier(9), write_seqcount_invalidate(9)
• SEQCNT_LATCH_ZERO(9), seqcount_latch_init(9), raw_read_seqcount_latch(9), read_seqcount_latch(9), raw_read_seqcount_latch_retry(9), read_seqcount_latch_retry(9), raw_write_seqcount_latch(9), write_seqcount_latch_begin(9), write_seqcount_latch(9), write_seqcount_latch_end(9)
• seqlock_init(9), DEFINE_SEQLOCK(9), read_seqbegin(9), read_seqretry(9), write_seqlock(9), write_sequnlock(9), write_seqlock_bh(9), write_sequnlock_bh(9), write_seqlock_irq(9), write_sequnlock_irq(9), write_seqlock_irqsave(9), write_sequnlock_irqrestore(9)
• read_seqlock_excl(9), read_sequnlock_excl(9), read_seqlock_excl_bh(9), read_sequnlock_excl_bh(9), read_sequnlock_excl_irq(9), read_seqlock_excl_irqsave(9), read_sequnlock_excl_irqrestore(9)
• read_seqbegin_or_lock(9), need_seqretry(9), done_seqretry(9), read_seqbegin_or_lock_irqsave(9), done_seqretry_irqrestore(9), scoped_seqlock_read(9)

That's the page, bestie. source/version: ./include/linux · date: October 2026 — go be iconic with your seqlocks. 💖👑