__read_seqcount_begin(9)

💖 __read_seqcount_begin(9) 💖

okay so welcome to the Kernel API Manual, bestie! today’s main character is __read_seqcount_begin(9), and she is literally here to begin a seqcount_t read section. slay. ✨

🎀 NAME 🎀

__read_seqcount_begin — begin a seqcount_t read section. periodt. 💅

🌸 SYNOPSIS 🌸

__read_seqcount_begin (s );

🦋 ARGUMENTS 🦋

• s — pointer to seqcount_t or any of the seqcount_LOCKNAME_t variants. that's the argument, bestie, no extra lore. 🫶

🌈 RETURN 🌈

the count to be passed to read_seqcount_retry. that's the whole return tea. 💖

👑 SEE ALSO 👑

Kernel file: ./include/linux/seqlock.h. the whole seqlock friend group is here, so go off:

• seqcount_init(9)
• SEQCNT_ZERO(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_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)

that's the whole page 💀 no extra behavior claims, just the facts, but make it cute.

mwah 💋 — source/version: ./include/linux, date: October 2026. bye bestie, go read some seqcounts! 🌟