sclp_sd_sync(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sclp_sd_sync(9) — the Kernel API Manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual (sclp_sd_sync(9)) and it's literally about doing a Store Data request synchronously — like, you ask, you wait, you get your answer. no chaos, no async shenanigans, just vibes and a blocking call. let's get into it 🦋

✨ NAME ✨

sclp_sd_sync — Perform Store Data request synchronously 💫

🌸 SYNOPSIS 🌸

int sclp_sd_sync (unsigned long page , u8 eq , u8 di , u64 sat , u64 sa
, u32 *dsize_ptr , u32 *esize_ptr );

💖 ARGUMENTS 💖

  • page — the address of your work page. must be below 2GB — that's not a suggestion, that's the rule, no cap 🙈
  • eq — Input EQ value
  • di — Input DI value
  • sat — Input SAT value
  • sa — Input SA value, used to specify the address of the target buffer 🎯
  • dsize_ptr — Optional pointer to the input and output DSIZE value (yes, both — she's an in/out girlie 💅)
  • esize_ptr — Optional pointer to the output ESIZE value

⭐ DESCRIPTION ⭐

okay so the whole gig: perform a Store Data request with all the parameters you specified, then wait for completion. that's it, that's the function — synchronous queen behavior 👑

It returns 0 on success and stores the resulting DSIZE and ESIZE values in dsize_ptr and esize_ptr (if you provided them, which — optional, so no pressure 🫶). On error it returns non-zero. lowkey simple, highkey useful.

🔥 SEE ALSO 🔥

Kernel file ./drivers/s390/char/sclp_sd.c — plus the whole friend group:

mwah 💋 that's the whole page. sourced from ./drivers/s390/char, dated October 2026, and it's sclp_sd_sync(9) herself signing off — go read the code bestie, ily, drink water 🍓✨

📦 where this page comes from