chsc_pnso(9)

💅 chsc_pnso(9) ✨

okay bestie, welcome to the Kernel API Manual corner of the group chat. This is chsc_pnso(9), and it's giving Perform Network-Subchannel Operation energy. No cap, it's a tiny page, so we're gonna slay it section by section 🫶

💖 NAME 💖

chsc_pnso — Perform Network-Subchannel Operation. That's the whole name, bestie, and it ate 💅

✨ SYNOPSIS ✨

int chsc_pnso (struct subchannel_id schid , struct chsc_pnso_area *pnso_area , u8 oc , struct chsc_pnso_resume_token resume_token , int cnc );

🎀 ARGUMENTS 🎀

• schid — id of the subchannel on which PNSO is performed. That's the subchannel bestie is working with 💅
• pnso_area — request and response block for the operation. It's the main-character block holding both sides of the convo 🔥
• oc — Operation Code. Yep, the operation code. iconic.
• resume_token — resume token for multiblock response. For when the response comes in multiple blocks 🧚
• cnc — Boolean change-notification control. Boolean. Control. You see the vision.

🦋 DESCRIPTION 🦋

Heads up: pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL). That's the rule — not vibes, not hope. The caller does it with that exact call 💖

Returns 0 on success. Periodt. ✨

🌈 SEE ALSO 🌈

Kernel file ./drivers/s390/cio/chsc.c is the source-file bestie. The related function squad is:

• chsc_error_from_response(9)
• chsc_ssqd(9)
• chsc_sadc(9)
• chsc_chp_vary(9)
• chsc_scm_info(9)
• chsc_scud(9)

Cute sign-off: this page lives under ./drivers/s390/cio, is dated October 2026, and answers to chsc_pnso(9). mwah 💋🎀