raw_atomic_dec(9)

✨ raw_atomic_dec(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 this one's a tiny little icon, a real "small but mighty" situation, so let's get into it 🫶

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🌸 NAME 🌸

raw_atomic_dec — the atomic decrement, but make it relaxed ordering 🧚✨

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🎀 SYNOPSIS 🎀

void raw_atomic_dec (atomic_t *v );

that's it. that's the whole vibe. one pointer, no return, no drama 💀

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🦋 ARGUMENTS 🦋

• v — pointer to an atomic_t. yes queen, it's an atomic_t pointer, not a void *, not an int *, don't even try it 🙈

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🔥 DESCRIPTION 🔥

so what it does is atomically update v to (v - 1) — with relaxed ordering. that's the whole assignment, no cap. it's giving "subtract one, but make it thread-safe" 💖

and the reason this little guy exists: it's safe to use in noinstr code. noinstr is the super-strict zone where you literally cannot be doing certain things, and raw_atomic_dec is allowed in there 🎀

but listen — prefer atomic_dec elsewhere 👑 like, raw_atomic_dec is the special-occasion one. for the normal everyday case, use atomic_dec. iykyk 🫶

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⭐ RETURN ⭐

Nothing. zero. nada. it returns void, it's a void girlie, it does the thing and leaves 💅✨

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🌈 SEE ALSO 🌈

okay this is the part where the page goes absolutely feral with cross-references, and honestly? iconic behavior 👑 every single one of these is here, let's go 🍓

💜 the raw_atomic_t reading & writing core 💜

raw_atomic_read(9), raw_atomic_read_acquire(9), raw_atomic_set(9), raw_atomic_set_release(9)

💜 raw_atomic_t add family 💜

raw_atomic_add(9), raw_atomic_add_return(9), raw_atomic_add_return_acquire(9), raw_atomic_add_return_release(9), raw_atomic_add_return_relaxed(9), raw_atomic_fetch_add(9), raw_atomic_fetch_add_acquire(9), raw_atomic_fetch_add_release(9), raw_atomic_fetch_add_relaxed(9)

💜 raw_atomic_t subtract family 💜

raw_atomic_sub(9), raw_atomic_sub_return(9), raw_atomic_sub_return_acquire(9), raw_atomic_sub_return_release(9), raw_atomic_sub_return_relaxed(9), raw_atomic_fetch_sub(9), raw_atomic_fetch_sub_acquire(9), raw_atomic_fetch_sub_release(9), raw_atomic_fetch_sub_relaxed(9)

💜 raw_atomic_t increment family 💜

raw_atomic_inc(9), raw_atomic_inc_return(9), raw_atomic_inc_return_acquire(9), raw_atomic_inc_return_release(9), raw_atomic_inc_return_relaxed(9), raw_atomic_fetch_inc(9), raw_atomic_fetch_inc_acquire(9), raw_atomic_fetch_inc_release(9), raw_atomic_fetch_inc_relaxed(9)

💜 raw_atomic_t decrement family (hi, this page's cousins) 💜

raw_atomic_dec_return(9), raw_atomic_dec_return_acquire(9), raw_atomic_dec_return_release(9), raw_atomic_dec_return_relaxed(9), raw_atomic_fetch_dec(9), raw_atomic_fetch_dec_acquire(9), raw_atomic_fetch_dec_release(9), raw_atomic_fetch_dec_relaxed(9)

💜 raw_atomic_t bitwise: and / andnot 💜

raw_atomic_and(9), raw_atomic_fetch_and(9), raw_atomic_fetch_and_acquire(9), raw_atomic_fetch_and_release(9), raw_atomic_fetch_and_relaxed(9), raw_atomic_andnot(9), raw_atomic_fetch_andnot(9), raw_atomic_fetch_andnot_acquire(9), raw_atomic_fetch_andnot_release(9), raw_atomic_fetch_andnot_relaxed(9)

💜 raw_atomic_t bitwise: or / xor 💜

raw_atomic_or(9), raw_atomic_fetch_or(9), raw_atomic_fetch_or_acquire(9), raw_atomic_fetch_or_release(9), raw_atomic_fetch_or_relaxed(9), raw_atomic_xor(9), raw_atomic_fetch_xor(9), raw_atomic_fetch_xor_acquire(9), raw_atomic_fetch_xor_release(9), raw_atomic_fetch_xor_relaxed(9)

💜 raw_atomic_t exchange 💜

raw_atomic_xchg(9), raw_atomic_xchg_acquire(9), raw_atomic_xchg_release(9), raw_atomic_xchg_relaxed(9)

💜 raw_atomic_t compare-and-exchange 💜

raw_atomic_cmpxchg(9), raw_atomic_cmpxchg_acquire(9), raw_atomic_cmpxchg_release(9), raw_atomic_cmpxchg_relaxed(9), raw_atomic_try_cmpxchg(9), raw_atomic_try_cmpxchg_acquire(9), raw_atomic_try_cmpxchg_release(9), raw_atomic_try_cmpxchg_relaxed(9)

💜 raw_atomic_t test / negative / unless variants 💜

raw_atomic_sub_and_test(9), raw_atomic_dec_and_test(9), raw_atomic_inc_and_test(9), raw_atomic_add_negative(9), raw_atomic_add_negative_acquire(9), raw_atomic_add_negative_release(9), raw_atomic_add_negative_relaxed(9), raw_atomic_fetch_add_unless(9), raw_atomic_add_unless(9), raw_atomic_inc_not_zero(9), raw_atomic_inc_unless_negative(9), raw_atomic_dec_unless_positive(9), raw_atomic_dec_if_positive(9)

🎀 now the whole 64-bit era, because she's thorough 🎀

💜 raw_atomic64_t reading & writing core 💜

raw_atomic64_read(9), raw_atomic64_read_acquire(9), raw_atomic64_set(9), raw_atomic64_set_release(9)

💜 raw_atomic64_t add family 💜

raw_atomic64_add(9), raw_atomic64_add_return(9), raw_atomic64_add_return_acquire(9), raw_atomic64_add_return_release(9), raw_atomic64_add_return_relaxed(9), raw_atomic64_fetch_add(9), raw_atomic64_fetch_add_acquire(9), raw_atomic64_fetch_add_release(9), raw_atomic64_fetch_add_relaxed(9)

💜 raw_atomic64_t subtract family 💜

raw_atomic64_sub(9), raw_atomic64_sub_return(9), raw_atomic64_sub_return_acquire(9), raw_atomic64_sub_return_release(9), raw_atomic64_sub_return_relaxed(9), raw_atomic64_fetch_sub(9), raw_atomic64_fetch_sub_acquire(9), raw_atomic64_fetch_sub_release(9), raw_atomic64_fetch_sub_relaxed(9)

💜 raw_atomic64_t increment family 💜

raw_atomic64_inc(9), raw_atomic64_inc_return(9), raw_atomic64_inc_return_acquire(9), raw_atomic64_inc_return_release(9), raw_atomic64_inc_return_relaxed(9), raw_atomic64_fetch_inc(9), raw_atomic64_fetch_inc_acquire(9), raw_atomic64_fetch_inc_release(9), raw_atomic64_fetch_inc_relaxed(9)

💜 raw_atomic64_t decrement family 💜

raw_atomic64_dec(9), raw_atomic64_dec_return(9), raw_atomic64_dec_return_acquire(9), raw_atomic64_dec_return_release(9), raw_atomic64_dec_return_relaxed(9), raw_atomic64_fetch_dec(9), raw_atomic64_fetch_dec_acquire(9), raw_atomic64_fetch_dec_release(9), raw_atomic64_fetch_dec_relaxed(9)

💜 raw_atomic64_t bitwise: and / andnot 💜

raw_atomic64_and(9), raw_atomic64_fetch_and(9), raw_atomic64_fetch_and_acquire(9), raw_atomic64_fetch_and_release(9), raw_atomic64_fetch_and_relaxed(9), raw_atomic64_andnot(9), raw_atomic64_fetch_andnot(9), raw_atomic64_fetch_andnot_acquire(9), raw_atomic64_fetch_andnot_release(9), raw_atomic64_fetch_andnot_relaxed(9)

💜 raw_atomic64_t bitwise: or / xor 💜

raw_atomic64_or(9), raw_atomic64_fetch_or(9), raw_atomic64_fetch_or_acquire(9), raw_atomic64_fetch_or_release(9), raw_atomic64_fetch_or_relaxed(9), raw_atomic64_xor(9), raw_atomic64_fetch_xor(9), raw_atomic64_fetch_xor_acquire(9), raw_atomic64_fetch_xor_release(9), raw_atomic64_fetch_xor_relaxed(9)

💜 raw_atomic64_t exchange 💜

raw_atomic64_xchg(9), raw_atomic64_xchg_acquire(9), raw_atomic64_xchg_release(9), raw_atomic64_xchg_relaxed(9)

💜 raw_atomic64_t compare-and-exchange 💜

raw_atomic64_cmpxchg(9), raw_atomic64_cmpxchg_acquire(9), raw_atomic64_cmpxchg_release(9), raw_atomic64_cmpxchg_relaxed(9), raw_atomic64_try_cmpxchg(9), raw_atomic64_try_cmpxchg_acquire(9), raw_atomic64_try_cmpxchg_release(9), raw_atomic64_try_cmpxchg_relaxed(9)

💜 raw_atomic64_t test / negative / unless variants 💜

raw_atomic64_sub_and_test(9), raw_atomic64_dec_and_test(9), raw_atomic64_inc_and_test(9), raw_atomic64_add_negative(9), raw_atomic64_add_negative_acquire(9), raw_atomic64_add_negative_release(9), raw_atomic64_add_negative_relaxed(9), raw_atomic64_fetch_add_unless(9), raw_atomic64_add_unless(9), raw_atomic64_inc_not_zero(9), raw_atomic64_inc_unless_negative(9), raw_atomic64_dec_unless_positive(9), raw_atomic64_dec_if_positive(9)

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🧚 and the actual source file, bestie 🧚

• Kernel file ./include/linux/atomic/atomic-arch-fallback.h — that's where she lives 💖

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fr fr that's the whole page. tiny function, massive cross-reference section, main character energy 👑

🌸💅✨ and that's a wrap! this lil page is brought to you by the ./include/linux/atomic crew, dated October 2026, living under the raw_atomic_dec(9) name in the Kernel API Manual — mwah, go decrement something atomically, ily 🫶💜🎀