atomic_long_...turn_release(9)

🌸 atomic_long_dec_return_release(9) — Kernel API Manual, bestie edition 🌸

okay so. welcome to the Kernel API Manual, the one and only 💅. today's main character is atomic_long_dec_return_release(9) and honestly? she's a little workhorse and we love her for it 💖

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✨ NAME ✨

atomic_long_dec_return_release — atomic decrement with release ordering 🎀

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🦋 SYNOPSIS 🦋

long atomic_long_dec_return_release (atomic_long_t *v );

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💜 ARGUMENTS 💜

• v — pointer to atomic_long_t. yes bestie, a pointer, hand her the address 🫶

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🔥 DESCRIPTION 🔥

so what she does, right — she atomically updates v to (v - 1) with release ordering. that's it. that's the whole vibe. no cap, no drama, just one clean atomic decrement that's not gonna get sniped by another thread mid-operation 👑

⚠️ vibe check warning: this one is unsafe to use in noinstr code. like, do not. use raw_atomic_long_dec_return_release there instead, fr fr 💀

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🌈 RETURN 🌈

the updated value of v. she gives you the result back, she's generous like that 💖

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👑 SEE ALSO 👑

kernel file ./include/linux/atomic/atomic-instrumented.h — she lives there, that's her address 🏠

and now… the friend group 😭 it's big. it's giving family reunion. i'm putting them in blocks so your eyes survive:

the reads, sets, adds, subs, incs and decs (the classics) 🎀

atomic_read(9), atomic_read_acquire(9), atomic_set(9), atomic_set_release(9),
atomic_add(9), atomic_add_return(9), atomic_add_return_acquire(9),
atomic_add_return_release(9), atomic_add_return_relaxed(9),
atomic_fetch_add(9), atomic_fetch_add_acquire(9), atomic_fetch_add_release(9),
atomic_fetch_add_relaxed(9), atomic_sub(9), atomic_sub_return(9),
atomic_sub_return_acquire(9), atomic_sub_return_release(9),
atomic_sub_return_relaxed(9), atomic_fetch_sub(9),
atomic_fetch_sub_acquire(9), atomic_fetch_sub_release(9),
atomic_fetch_sub_relaxed(9), atomic_inc(9), atomic_inc_return(9),
atomic_inc_return_acquire(9), atomic_inc_return_release(9),
atomic_inc_return_relaxed(9), atomic_fetch_inc(9),
atomic_fetch_inc_acquire(9), atomic_fetch_inc_release(9),
atomic_fetch_inc_relaxed(9), atomic_dec(9), atomic_dec_return(9),
atomic_dec_return_acquire(9), atomic_dec_return_release(9),
atomic_dec_return_relaxed(9), atomic_fetch_dec(9),
atomic_fetch_dec_acquire(9), atomic_fetch_dec_release(9),
atomic_fetch_dec_relaxed(9),

the bitwise girlies + the swap / compare-and-swap crew + the test-and-unless squad ✨

atomic_and(9), atomic_fetch_and(9), atomic_fetch_and_acquire(9),
atomic_fetch_and_release(9), atomic_fetch_and_relaxed(9), atomic_andnot(9),
atomic_fetch_andnot(9), atomic_fetch_andnot_acquire(9),
atomic_fetch_andnot_release(9), atomic_fetch_andnot_relaxed(9),
atomic_or(9), atomic_fetch_or(9), atomic_fetch_or_acquire(9),
atomic_fetch_or_release(9), atomic_fetch_or_relaxed(9), atomic_xor(9),
atomic_fetch_xor(9), atomic_fetch_xor_acquire(9), atomic_fetch_xor_release(9),
atomic_fetch_xor_relaxed(9), atomic_xchg(9), atomic_xchg_acquire(9),
atomic_xchg_release(9), atomic_xchg_relaxed(9), atomic_cmpxchg(9),
atomic_cmpxchg_acquire(9), atomic_cmpxchg_release(9), atomic_cmpxchg_relaxed(9),
atomic_try_cmpxchg(9), atomic_try_cmpxchg_acquire(9),
atomic_try_cmpxchg_release(9), atomic_try_cmpxchg_relaxed(9),
atomic_sub_and_test(9), atomic_dec_and_test(9), atomic_inc_and_test(9),
atomic_add_negative(9), atomic_add_negative_acquire(9),
atomic_add_negative_release(9), atomic_add_negative_relaxed(9),
atomic_fetch_add_unless(9), atomic_add_unless(9), atomic_inc_not_zero(9),
atomic_inc_unless_negative(9), atomic_dec_unless_positive(9),
atomic_dec_if_positive(9),

the atomic64_* extended universe 💫 (64 bits of pure slay)

atomic64_read(9), atomic64_read_acquire(9), atomic64_set(9),
atomic64_set_release(9), atomic64_add(9), atomic64_add_return(9),
atomic64_add_return_acquire(9), atomic64_add_return_release(9),
atomic64_add_return_relaxed(9), atomic64_fetch_add(9),
atomic64_fetch_add_acquire(9), atomic64_fetch_add_release(9),
atomic64_fetch_add_relaxed(9), atomic64_sub(9), atomic64_sub_return(9),
atomic64_sub_return_acquire(9), atomic64_sub_return_release(9),
atomic64_sub_return_relaxed(9), atomic64_fetch_sub(9),
atomic64_fetch_sub_acquire(9), atomic64_fetch_sub_release(9),
atomic64_fetch_sub_relaxed(9), atomic64_inc(9), atomic64_inc_return(9),
atomic64_inc_return_acquire(9), atomic64_inc_return_release(9),
atomic64_inc_return_relaxed(9), atomic64_fetch_inc(9),
atomic64_fetch_inc_acquire(9), atomic64_fetch_inc_release(9),
atomic64_fetch_inc_relaxed(9), atomic64_dec(9), atomic64_dec_return(9),
atomic64_dec_return_acquire(9), atomic64_dec_return_release(9),
atomic64_dec_return_relaxed(9), atomic64_fetch_dec(9),
atomic64_fetch_dec_acquire(9), atomic64_fetch_dec_release(9),
atomic64_fetch_dec_relaxed(9), atomic64_and(9), atomic64_fetch_and(9),
atomic64_fetch_and_acquire(9), atomic64_fetch_and_release(9),
atomic64_fetch_and_relaxed(9), atomic64_andnot(9), atomic64_fetch_andnot(9),
atomic64_fetch_andnot_acquire(9), atomic64_fetch_andnot_release(9),
atomic64_fetch_andnot_relaxed(9), atomic64_or(9), atomic64_fetch_or(9),
atomic64_fetch_or_acquire(9), atomic64_fetch_or_release(9),
atomic64_fetch_or_relaxed(9), atomic64_xor(9), atomic64_fetch_xor(9),
atomic64_fetch_xor_acquire(9), atomic64_fetch_xor_release(9),
atomic64_fetch_xor_relaxed(9), atomic64_xchg(9), atomic64_xchg_acquire(9),
atomic64_xchg_release(9), atomic64_xchg_relaxed(9), atomic64_cmpxchg(9),
atomic64_cmpxchg_acquire(9), atomic64_cmpxchg_release(9),
atomic64_cmpxchg_relaxed(9), atomic64_try_cmpxchg(9),
atomic64_try_cmpxchg_acquire(9), atomic64_try_cmpxchg_release(9),
atomic64_try_cmpxchg_relaxed(9), atomic64_sub_and_test(9),
atomic64_dec_and_test(9), atomic64_inc_and_test(9),
atomic64_add_negative(9), atomic64_add_negative_acquire(9),
atomic64_add_negative_release(9), atomic64_add_negative_relaxed(9),
atomic64_fetch_add_unless(9), atomic64_add_unless(9),
atomic64_inc_not_zero(9), atomic64_inc_unless_negative(9),
atomic64_dec_unless_positive(9), atomic64_dec_if_positive(9),

and finally her own atomic_long_* family — the whole entire tree, iykyk 🧚💜

atomic_long_read(9), atomic_long_read_acquire(9), atomic_long_set(9),
atomic_long_set_release(9), atomic_long_add(9), atomic_long_add_return(9),
atomic_long_add_return_acquire(9), atomic_long_add_return_release(9),
atomic_long_add_return_relaxed(9), atomic_long_fetch_add(9),
atomic_long_fetch_add_acquire(9), atomic_long_fetch_add_release(9),
atomic_long_fetch_add_relaxed(9), atomic_long_sub(9),
atomic_long_sub_return(9), atomic_long_sub_return_acquire(9),
atomic_long_sub_return_release(9), atomic_long_sub_return_relaxed(9),
atomic_long_fetch_sub(9), atomic_long_fetch_sub_acquire(9),
atomic_long_fetch_sub_release(9), atomic_long_fetch_sub_relaxed(9),
atomic_long_inc(9), atomic_long_inc_return(9),
atomic_long_inc_return_acquire(9), atomic_long_inc_return_release(9),
atomic_long_inc_return_relaxed(9), atomic_long_fetch_inc(9),
atomic_long_fetch_inc_acquire(9), atomic_long_fetch_inc_release(9),
atomic_long_fetch_inc_relaxed(9), atomic_long_dec(9),
atomic_long_dec_return(9), atomic_long_dec_return_acquire(9),
atomic_long_dec_return_relaxed(9), atomic_long_fetch_dec(9),
atomic_long_fetch_dec_acquire(9), atomic_long_fetch_dec_release(9),
atomic_long_fetch_dec_relaxed(9), atomic_long_and(9),
atomic_long_fetch_and(9), atomic_long_fetch_and_acquire(9),
atomic_long_fetch_and_release(9), atomic_long_fetch_and_relaxed(9),
atomic_long_andnot(9), atomic_long_fetch_andnot(9),
atomic_long_fetch_andnot_acquire(9), atomic_long_fetch_andnot_release(9),
atomic_long_fetch_andnot_relaxed(9), atomic_long_or(9),
atomic_long_fetch_or(9), atomic_long_fetch_or_acquire(9),
atomic_long_fetch_or_release(9), atomic_long_fetch_or_relaxed(9),
atomic_long_xor(9), atomic_long_fetch_xor(9),
atomic_long_fetch_xor_acquire(9), atomic_long_fetch_xor_release(9),
atomic_long_fetch_xor_relaxed(9), atomic_long_xchg(9),
atomic_long_xchg_acquire(9), atomic_long_xchg_release(9),
atomic_long_xchg_relaxed(9), atomic_long_cmpxchg(9),
atomic_long_cmpxchg_acquire(9), atomic_long_cmpxchg_release(9),
atomic_long_cmpxchg_relaxed(9), atomic_long_try_cmpxchg(9),
atomic_long_try_cmpxchg_acquire(9), atomic_long_try_cmpxchg_release(9),
atomic_long_try_cmpxchg_relaxed(9), atomic_long_sub_and_test(9),
atomic_long_dec_and_test(9), atomic_long_inc_and_test(9),
atomic_long_add_negative(9), atomic_long_add_negative_acquire(9),
atomic_long_add_negative_release(9), atomic_long_add_negative_relaxed(9),
atomic_long_fetch_add_unless(9), atomic_long_add_unless(9),
atomic_long_inc_not_zero(9), atomic_long_inc_unless_negative(9),
atomic_long_dec_unless_positive(9), atomic_long_dec_if_positive(9)

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okay that's the whole page bestie, go forth and decrement responsibly 🫶✨

sign-off cuteness: this lil page came from ./include/linux/atomic, dated October 2026, and she answers to the name atomic_long_...turn_release(9) 🎀 bye bye, mwah 💋🌸