write_seqlock_bh(9)

🦋 write_seqlock_bh(9) 🦋

okay bestie, this is the Kernel API Manual page for write_seqlock_bh(9), and I folded the manual name right up here so it's comfy. It's short, it's niche, it's giving “tiny but crucial kernel helper.” Let's get into it. 🫶

✨ NAME ✨

write_seqlock_bh — start a softirqs-disabled seqlock_t write section. periodt.

💅 SYNOPSIS 💅

void write_seqlock_bh (seqlock_t *sl );

🎀 ARGUMENTS 🎀

• sl — Pointer to seqlock_t. That's it, bestie. One pointer, zero drama. 🍓

🔥 DESCRIPTION 🔥

write_seqlock_bh is the _bh variant of write_seqlock.

Use only if the read side section, or other write side sections, can be invoked from softirq contexts. 🫶

That's the whole vibe check. It's giving “specialized tool, read the condition first,” so don't just use it because the _bh suffix looks iconic. no cap.

🌈 SEE ALSO 🌈

Kernel file ./include/linux/seqlock.h

The whole seqlock friend group 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_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_seqlock_excl_irq(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)

mwah 💖 — source/version: ./include/linux; date: October 2026; page: write_seqlock_bh(9) — byeee, bestie! 👑