iowait_pio_pending(9)

🌸 NAME 🌸

Okay bestie, welcome to the iowait_pio_pending(9) page from the Kernel API Manual — yes, that one. This function’s whole personality is return pio pending count. That’s the gig. Literally it. 💅✨

✨ SYNOPSIS ✨

int iowait_pio_pending (struct iowait *wait );

Look at that signature: int return, struct iowait *wait argument, and yes, the space before the closing paren is staying, because we keep code exactly as it is in this house. 🫶

🦋 ARGUMENTS 🦋

• wait — the iowait structure. Bestie, this is the struct iowait * from the synopsis, and that’s what you pass in. No cap, it’s the iowait structure. 🎀

🎀 SEE ALSO 🎀

The kernel file for this one is ./drivers/infiniband/hw/hfi1/iowait.h — go look, it’s right there. And the whole iowait friend group is linked below, fr fr:

• iowait_schedule(9)
• iowait_tid_schedule(9)
• iowait_sdma_drain(9)
• iowait_sdma_pending(9)
• iowait_sdma_inc(9)
• iowait_sdma_add(9)
• iowait_sdma_dec(9)
• iowait_pio_drain(9)
• iowait_pio_inc(9)
• iowait_pio_dec(9)
• iowait_drain_wakeup(9)
• iowait_get_txhead(9)
• iowait_queue(9)
• iowait_starve_clear(9)
• iowait_packet_queued(9)
• iowait_get_tid_work(9)
• iowait_get_ib_work(9)
• iowait_ioww_to_iow(9)

That’s the whole page — tiny, iconic, and very “utility function that knows exactly what it is.” 😭👑

source/version: ./drivers/infiniband/hw/hfi1 · date: October 2026 · page: iowait_pio_pending(9) — mwah 💖