raw_atomic_long_xchg(9)

💅 raw_atomic_long_xchg(9) 💅

okay bestie, welcome to the Kernel API Manual — today’s main character is raw_atomic_long_xchg(9), and she is literally the atomic exchange with full ordering ✨

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🌸 NAME 🌸

raw_atomic_long_xchg — atomic exchange with full ordering 💖

✨ SYNOPSIS ✨

long raw_atomic_long_xchg (atomic_long_t *v , long new );

🎀 ARGUMENTS 🎀

• v — pointer to atomic_long_t 💅
• new — long value to assign 🎀

💅 DESCRIPTION 💅

okay so she atomically updates v to new with full ordering — a whole swap situation, no cap.

She’s safe to use in noinstr code; but elsewhere, bestie, prefer atomic_long_xchg — that’s the vibe check from the manpage itself 👑

🦋 RETURN 🦋

The original value of v — the before pic, not the after 😭💖

👀 SEE ALSO 👀

Kernel file ./include/linux/atomic/atomic-long.h — and the whole atomic-long squad is below, bestie 👇

• 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_fetch_add_relaxed(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_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)

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xoxo, raw_atomic_long_xchg(9) 💅 — source ./include/linux/atomic, October 2026 🎀