read_seqcount_begin(9)

💅 read_seqcount_begin(9) 💅

okay bestie, welcome to the Kernel API Manual page for read_seqcount_begin(9) — you are officially beginning a seqcount_t read critical section, and honestly? iconic. 🎀

🌸 NAME 🌸

read_seqcount_begin — begin a seqcount_t read critical section. That's the whole assignment, no cap. ✨

✨ SYNOPSIS ✨

read_seqcount_begin (s );

🎀 ARGUMENTS 🎀

• s — pointer to seqcount_t or any of the seqcount_LOCKNAME_t variants. Yes, any of them, bestie. 🫶

💖 RETURN 💖

The return value is the count to be passed to read_seqcount_retry. That's the handoff, bestie: this count is the thing you pass to read_seqcount_retry. 💅

🦋 SEE ALSO 🦋

Kernel file ./include/linux/seqlock.h — yep, that's the one. Here's the entire SEE ALSO roster, all still in the group chat:

• seqcount_init(9)
• SEQCNT_ZERO(9)
• __read_seqcount_begin(9)
• raw_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_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)

source/version check: ./include/linux, October 2026 — mwah, go forth and slay your reads 💅✨