raw_atomic6...h_or_relaxed(9)

🎀 NAME 🎀

raw_atomic64_fetch_or_relaxed — atomic bitwise OR with relaxed ordering. Periodt. This is the raw_atomic6...h_or_relaxed(9) page from the Kernel API Manual, and yes the title is a little cursed, but the function itself is iconic. 💅

✨ SYNOPSIS ✨

Okay bestie, the call is literally this:

s64 raw_atomic64_fetch_or_relaxed (s64 i , atomic64_t *v );

🫶 ARGUMENTS 🫶

• i — an s64 value. This is the value you're OR-ing in. 🌸
• v — pointer to atomic64_t. This is the atomic thing getting updated. 🦋

💖 DESCRIPTION 💖

Okay so here's the tea: it atomically updates v to (v | i) with relaxed ordering. That's the whole mood. ✨

Real talk, bestie: it's safe to use in noinstr code; prefer atomic64_fetch_or_relaxed elsewhere. Keep that in mind and you're golden. 🫶

🔥 RETURN 🔥

The original value of v. Not the new value — the original one. She's giving "before pic" energy. 😭

👀 SEE ALSO 👀

Kernel file: ./include/linux/atomic/atomic-arch-fallback.h

The whole friend group, in original order:

• raw_atomic_read(9), raw_atomic_read_acquire(9), raw_atomic_set(9)
• raw_atomic_set_release(9), 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_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_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_dec(9)
• 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_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_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_xchg(9), raw_atomic_xchg_acquire(9)
• raw_atomic_xchg_release(9), raw_atomic_xchg_relaxed(9)
• 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_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), raw_atomic64_read(9)
• raw_atomic64_read_acquire(9), raw_atomic64_set(9)
• raw_atomic64_set_release(9), 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_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_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_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_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_or(9)
• raw_atomic64_fetch_or(9), raw_atomic64_fetch_or_acquire(9)
• raw_atomic64_fetch_or_release(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_xchg(9), raw_atomic64_xchg_acquire(9)
• raw_atomic64_xchg_release(9), raw_atomic64_xchg_relaxed(9)
• 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_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)

Okay bye bestie! This little masterpiece lives under source/version ./include/linux/atomic, dated October 2026. Stay atomic, stay relaxed, and don't forget to hydrate. 💖✨