atomic64_dec_return_release(9)

💅 atomic64_dec_return_release(9) — Kernel API Manual ✨

🎀 NAME 🎀

atomic64_dec_return_release — atomic decrement with release ordering

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🌸 SYNOPSIS 🌸

s64 atomic64_dec_return_release (atomic64_t *v );

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🦋 ARGUMENTS 🦋

• v — pointer to atomic64_t

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✨ DESCRIPTION ✨

okay so bestie, this one atomically updates v to (v - 1) with release ordering. That's the whole vibe: decrement it, atomically, and the ordering is release.

⚠️ Unsafe to use in noinstr code; use raw_atomic64_dec_return_release there. no cap, respect the noinstr rule 💀

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👑 RETURN 👑

The updated value of v. periodt 💅

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💫 SEE ALSO 💫

Kernel file ./include/linux/atomic/atomic-instrumented.h is the home base, and the whole atomic extended family is here:

• 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)
• 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)
• 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_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)
• 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_release(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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source/version: ./include/linux/atomic • date: October 2026 • page: atomic64_dec_return_release(9) — mwah 💖✨