raw_atomic_...xchg_release(9)

💖 NAME 💖

okay so welcome to the Kernel API Manual, bestie 💖 — this page is filed under raw_atomic_...xchg_release(9) and it's all about raw_atomic_long_try_cmpxchg_release: atomic compare and exchange with release ordering. It's giving "try the compare-exchange, but make it release-flavored." No cap. ✨

✨ SYNOPSIS ✨

copy this exactly, spaces and all:

bool raw_atomic_long_try_cmpxchg_release (atomic_long_t *v , long *old ,
       long new );

🎀 ARGUMENTS 🎀

• v — pointer to atomic_long_t. This is the atomic long getting the main character treatment 👑.
• old — pointer to long value to compare with. The "is it this one?" pointer, basically.
• new — long value to assign. The new value waiting in the wings 💅.

💅 DESCRIPTION 💅

If (v == old), it atomically updates v to new with release ordering. Slay. Otherwise, v is not modified, old is updated to the current value of v, and relaxed ordering is provided. That's the tea ☕.

Heads up, bestie: it's safe to use in noinstr code 🫶. But elsewhere, prefer atomic_long_try_cmpxchg_release. Periodt.

🔥 RETURN 🔥

Returns true if the exchange occurred, and false otherwise. The bool is booling, fr fr. 😌

🦋 SEE ALSO 🦋

Kernel file: ./include/linux/atomic/atomic-long.h — the source of truth, go read it.

• Read/set core: raw_atomic_long_read(9), raw_atomic_long_read_acquire(9), raw_atomic_long_set(9), raw_atomic_long_set_release(9)
• Add squad: 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)
• Sub squad: 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)
• Inc squad: 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)
• Dec squad: 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)
• Bitwise AND crew: 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)
• Exchange/compare crew: 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_relaxed(9)
• Test/negative/unless besties: 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)

Mwah 💋 — source/version: ./include/linux/atomic, dated October 2026. Bye bestie, go atomically slay. 🌈