wake_const_ops(9)

💅 wake_const_ops(9)

okay bestie, welcome to the kernel API manual for wake_const_ops(9) — yes that's the page title and the function name, we love a consistent queen ✨

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🌸 NAME

wake_const_ops — wake up non-alter tasks 🫶

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🎀 SYNOPSIS

int wake_const_ops (struct sem_array *sma , int semnum , struct
       wake_q_head *wake_q );

like, she takes three things and gives you back an int, periodt 💅

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✨ ARGUMENTS

• sma — the semaphore array. that's her house 🏠
• semnum — the semaphore that was modified. the specific one, no cap 👑
• wake_q — the lockless wake-queue head. lockless!! iconic 🦋

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💖 DESCRIPTION

okay so here's the tea ☕ — wake_const_ops must be called after a semaphore in a semaphore array was set to 0. like, that's the whole prerequisite, don't skip it 🙈

if complex const operations are pending, wake_const_ops must be called with semnum = -1, as well as with the number of each modified semaphore. both! not one or the other! fr fr 📢

the tasks that must be woken up get added to wake_q — she's collecting them like pokémon 🧚

the return code is stored in q->pid. yes, that q->pid. 🍓

and the function returns 1 if at least one operation was completed successfully. so a 1 here is a slay, basically 🌈

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🦋 SEE ALSO

kernel file ./ipc/sem.c — and her whole friend group 💜

• unmerge_queues(9)
• merge_queues(9)
• newary(9)
• do_smart_wakeup_zero(9)
• update_queue(9)
• set_semotime(9)
• do_smart_update(9)
• find_alloc_undo(9)

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and that's the page!! 💫 this one lives in ./ipc, dated October 2026, and it's filed under wake_const_ops(9) — go off, kernel API manual, you ate 🔥👑