raw_atomic_..._add_relaxed(9)

💖 NAME 💖

Okay bestie, welcome to the Kernel API Manual ✨ — the page header says raw_atomic_..._add_relaxed(9), but the function you actually came here for is raw_atomic_long_fetch_add_relaxed. It's an atomic add with relaxed ordering, and yes, it's kind of a whole mood. 💅

✨ SYNOPSIS ✨

long raw_atomic_long_fetch_add_relaxed (long i , atomic_long_t *v );

🌸 ARGUMENTS 🌸

• i — the long value you're adding. It's the amount going into the atomic add, bestie.
• v — a pointer to an atomic_long_t. This is the atomic thing getting updated.

🦋 DESCRIPTION 🦋

Okay so this function atomically updates v to (v + i) with relaxed ordering. Atomic, relaxed, done. No cap.

It's safe to use in noinstr code — iconic — but the page says prefer atomic_long_fetch_add_relaxed elsewhere. So yes, this is the one for the noinstr situation; for other spots, the manual is pointing you at atomic_long_fetch_add_relaxed. 🫶

🔥 RETURN 🔥

The original value of v, returned to you. It's giving "here's what it was before I changed it" energy. 😭

⭐ SEE ALSO ⭐

Kernel file: ./include/linux/atomic/atomic-long.h

The whole atomic-long extended universe is here, periodt:

• raw_atomic_long_read(9), raw_atomic_long_read_acquire(9), raw_atomic_long_set(9), raw_atomic_long_set_release(9)
• raw_atomic_long_add(9), raw_atomic_long_add_return(9), raw_atomic_long_add_return_acquire(9), raw_atomic_long_add_return_release(9), raw_atomic_long_add_return_relaxed(9), raw_atomic_long_fetch_add(9), raw_atomic_long_fetch_add_acquire(9), raw_atomic_long_fetch_add_release(9)
• raw_atomic_long_sub(9), raw_atomic_long_sub_return(9), raw_atomic_long_sub_return_acquire(9), raw_atomic_long_sub_return_release(9), raw_atomic_long_sub_return_relaxed(9), raw_atomic_long_fetch_sub(9), raw_atomic_long_fetch_sub_acquire(9), raw_atomic_long_fetch_sub_release(9), raw_atomic_long_fetch_sub_relaxed(9)
• raw_atomic_long_inc(9), raw_atomic_long_inc_return(9), raw_atomic_long_inc_return_acquire(9), raw_atomic_long_inc_return_release(9), raw_atomic_long_inc_return_relaxed(9), raw_atomic_long_fetch_inc(9), raw_atomic_long_fetch_inc_acquire(9), raw_atomic_long_fetch_inc_release(9), raw_atomic_long_fetch_inc_relaxed(9)
• raw_atomic_long_dec(9), raw_atomic_long_dec_return(9), raw_atomic_long_dec_return_acquire(9), raw_atomic_long_dec_return_release(9), raw_atomic_long_dec_return_relaxed(9), raw_atomic_long_fetch_dec(9), raw_atomic_long_fetch_dec_acquire(9), raw_atomic_long_fetch_dec_release(9), raw_atomic_long_fetch_dec_relaxed(9)
• raw_atomic_long_and(9), raw_atomic_long_fetch_and(9), raw_atomic_long_fetch_and_acquire(9), raw_atomic_long_fetch_and_release(9), raw_atomic_long_fetch_and_relaxed(9), raw_atomic_long_andnot(9), raw_atomic_long_fetch_andnot(9), raw_atomic_long_fetch_andnot_acquire(9), raw_atomic_long_fetch_andnot_release(9), raw_atomic_long_fetch_andnot_relaxed(9)
• raw_atomic_long_or(9), raw_atomic_long_fetch_or(9), raw_atomic_long_fetch_or_acquire(9), raw_atomic_long_fetch_or_release(9), raw_atomic_long_fetch_or_relaxed(9), raw_atomic_long_xor(9), raw_atomic_long_fetch_xor(9), raw_atomic_long_fetch_xor_acquire(9), raw_atomic_long_fetch_xor_release(9), raw_atomic_long_fetch_xor_relaxed(9)
• raw_atomic_long_xchg(9), raw_atomic_long_xchg_acquire(9), raw_atomic_long_xchg_release(9), raw_atomic_long_xchg_relaxed(9), raw_atomic_long_cmpxchg(9), raw_atomic_long_cmpxchg_acquire(9), raw_atomic_long_cmpxchg_release(9), raw_atomic_long_cmpxchg_relaxed(9), raw_atomic_long_try_cmpxchg(9), raw_atomic_long_try_cmpxchg_acquire(9), raw_atomic_long_try_cmpxchg_release(9), raw_atomic_long_try_cmpxchg_relaxed(9)
• raw_atomic_long_sub_and_test(9), raw_atomic_long_dec_and_test(9), raw_atomic_long_inc_and_test(9), raw_atomic_long_add_negative(9), raw_atomic_long_add_negative_acquire(9), raw_atomic_long_add_negative_release(9), raw_atomic_long_add_negative_relaxed(9)
• raw_atomic_long_fetch_add_unless(9), raw_atomic_long_add_unless(9), raw_atomic_long_inc_not_zero(9), raw_atomic_long_inc_unless_negative(9), raw_atomic_long_dec_unless_positive(9), raw_atomic_long_dec_if_positive(9)

Okay that's the whole page, bestie 🫶. It's from the Kernel API Manual, with footer source/version ./include/linux/atomic and date October 2026. Now go forth and add atomically, relaxed-style 💅✨