raw_atomic_..._sub_relaxed(9)

💖 NAME 💖

okay so welcome to the Kernel API Manual page for raw_atomic_..._sub_relaxed(9), bestie. The actual function is raw_atomic_long_fetch_sub_relaxed — it's giving atomic subtract with relaxed ordering, and yes, it's iconic.

✨ SYNOPSIS ✨

long raw_atomic_long_fetch_sub_relaxed (long i , atomic_long_t *v );

🎀 ARGUMENTS 🎀

• i — a long value to subtract. that's the amount getting subtracted, periodt.
• v — a pointer to atomic_long_t. this is the atomic long being updated, main character energy fr.

🦋 DESCRIPTION 🦋

So here's the vibe: this function atomically updates v to (v - i), and the ordering is relaxed. no cap, that's the whole atomic glow-up.

It's safe to use in noinstr code. everywhere else, though, you should prefer atomic_long_fetch_sub_relaxed — that's the recommended bestie for non-noinstr situations. 💅

🌸 RETURN 🌸

You get the original value of v back — like, the value from before the subtract happened. the pre-subtract era, if you will. 🫶

🌈 SEE ALSO 🌈

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

💜 read + set girlies

• raw_atomic_long_read(9), raw_atomic_long_read_acquire(9)
• raw_atomic_long_set(9), raw_atomic_long_set_release(9)

🔥 add girlies

• 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 girlies

• 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)

🍓 inc girlies

• 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 girlies

• 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)

👑 and + andnot girlies

• 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)

⭐ or + xor girlies

• 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)

🦋 xchg + cmpxchg girlies

• 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)

🎀 tests, negatives, and unless girlies

• 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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signed, sealed, and slayed by ./include/linux/atomic, dated October 2026, under the page tag raw_atomic_..._sub_relaxed(9) 💅✨