p9_pollwait(9)

✨ p9_pollwait(9) ✨

okay so bestie, welcome to the Kernel API Manual 🎀 this one's a lil function called p9_pollwait and honestly? she's a tiny little matchmaker 💅

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💖 NAME 💖

p9_pollwait — add poll task to the wait queue 🫶

like, literally she takes a poll task and gets it onto the wait queue. matchmaker energy fr fr.

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🌸 SYNOPSIS 🌸

void p9_pollwait (struct file *filp , wait_queue_head_t *wait_address ,
poll_table *p );

that's the whole signature, no cap — void return, three args, go off 👑

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🦋 ARGUMENTS 🦋

• filp — the file pointer being polled, iykyk 🗂️ this is the file she's checking on
• wait_address — the wait_q to block on 😴 the place where the waiting actually happens
• p — poll state, that's it, that's the vibe check result 🔥

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⭐ DESCRIPTION ⭐

so what does she actually do? she's called by files poll operation and her whole job is to add the v9fs-poll task to the file's wait queue 💫 that's it. that's the whole gig. iconic, lowkey, main character energy in the most understated way possible 🧚

not me being obsessed with how a single function can be this specific 😭

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🌈 SEE ALSO 🌈

the kernel file ./net/9p/trans_fd.c is where it all lives, and here's the whole friend group 👯‍♀️:

• struct p9_conn(9)
• struct p9_trans_fd(9)
• p9_conn_cancel(9)
• p9_fd_read(9)
• p9_read_work(9)
• p9_fd_write(9)
• p9_write_work(9)
• p9_conn_create(9)
• p9_poll_mux(9)
• p9_fd_request(9)
• p9_conn_destroy(9)
• p9_fd_close(9)
• p9_poll_workfn(9)

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💀 quick reminder bestie: keep the args exactly as written, wait_queue_head_t * and poll_table * are not interchangeable and the compiler will absolutely clock you 🙈

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and that's the page!! 🍓 sign-off time: this one lives under ./net/9p and the docs are dated October 2026 — periodt, go read the kernel source, mwah 💜🦋