raw_atomic_l...xchg_release(9)

🦋 raw_atomic_l...xchg_release(9) — Kernel API Manual 🦋

okay so bestie, the actual function here is raw_atomic_long_xchg_release, and this is its Kernel API Manual moment. It’s the raw atomic-long exchange-with-release-ordering girlie, and she is lowkey iconic for noinstr code. 💅

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🌸 NAME 🌸

raw_atomic_long_xchg_release — atomic exchange with release ordering. That’s the whole vibe: swap in a new value, atomically, with release ordering doing its thing. ✨

✨ SYNOPSIS ✨

long raw_atomic_long_xchg_release (atomic_long_t *v , long new );

🎀 ARGUMENTS 🎀

• v — pointer to atomic_long_t. This is the atomic long getting the glow-up.
• new — long value to assign. This is the fresh value moving in.

💖 DESCRIPTION 💖

Atomically updates v to new with release ordering. No cap, it’s an atomic exchange, and the release ordering is part of the package. 🫶

It’s safe to use in noinstr code; if you’re not in noinstr, prefer atomic_long_xchg_release elsewhere. That’s the “use the regular one for normal contexts” note, bestie. 💅

Quick vibe check: this page is about the raw_ version. The non-raw preference for ordinary code is atomic_long_xchg_release, exactly like the manpage says. 🎀

🌈 RETURN 🌈

The original value of v. Yep, you get the before picture back — the value that was sitting there before the exchange. 😭💖

👑 SEE ALSO 👑

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

• 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(9), raw_atomic_long_xchg_acquire(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 bye bestie — this page came from ./include/linux/atomic, dated October 2026, with the page tag raw_atomic_l...xchg_release(9). 💖