scsw_is_valid_stctl(9)

okay bestie, welcome to the scsw_is_valid_stctl(9) page from the Kernel API Manual — it's giving quick validity-check energy and we're gonna get into it. 💖

NAME 💅

scsw_is_valid_stctl — check stctl field validity. periodt.

SYNOPSIS ✨

int scsw_is_valid_stctl (union scsw *scsw );

ARGUMENTS 🫶

• scsw — pointer to scsw. literally the scsw you're checking, bestie.

DESCRIPTION 🦋

okay so this one is simple: it returns non-zero if the stctl field of the specified scsw is valid — and that's true regardless of whether it's a transport mode or command mode scsw. no cap.

if the field does not contain a valid value, you get zero back. that's the whole vibe check. 💅

SEE ALSO 🌈

start with the kernel file ./arch/s390/include/asm/scsw.h, then the whole scsw friend group:

• struct cmd_scsw(9), struct tm_scsw(9), struct eadm_scsw(9), union scsw(9)
• scsw_is_tm(9), scsw_key(9), scsw_eswf(9), scsw_cc(9), scsw_ectl(9), scsw_pno(9), scsw_fctl(9), scsw_actl(9), scsw_stctl(9), scsw_dstat(9), scsw_cstat(9)
• scsw_cmd_is_valid_key(9), scsw_cmd_is_valid_sctl(9), scsw_cmd_is_valid_eswf(9), scsw_cmd_is_valid_cc(9), scsw_cmd_is_valid_fmt(9), scsw_cmd_is_valid_pfch(9), scsw_cmd_is_valid_isic(9), scsw_cmd_is_valid_alcc(9), scsw_cmd_is_valid_ssi(9), scsw_cmd_is_valid_zcc(9), scsw_cmd_is_valid_ectl(9), scsw_cmd_is_valid_pno(9), scsw_cmd_is_valid_fctl(9), scsw_cmd_is_valid_actl(9), scsw_cmd_is_valid_stctl(9), scsw_cmd_is_valid_dstat(9), scsw_cmd_is_valid_cstat(9)
• scsw_tm_is_valid_key(9), scsw_tm_is_valid_eswf(9), scsw_tm_is_valid_cc(9), scsw_tm_is_valid_fmt(9), scsw_tm_is_valid_x(9), scsw_tm_is_valid_q(9), scsw_tm_is_valid_ectl(9), scsw_tm_is_valid_pno(9), scsw_tm_is_valid_fctl(9), scsw_tm_is_valid_actl(9), scsw_tm_is_valid_stctl(9), scsw_tm_is_valid_dstat(9), scsw_tm_is_valid_cstat(9), scsw_tm_is_valid_fcxs(9), scsw_tm_is_valid_schxs(9)
• scsw_is_valid_actl(9), scsw_is_valid_cc(9), scsw_is_valid_cstat(9), scsw_is_valid_dstat(9), scsw_is_valid_ectl(9), scsw_is_valid_eswf(9), scsw_is_valid_fctl(9), scsw_is_valid_key(9), scsw_is_valid_pno(9)
• scsw_cmd_is_solicited(9), scsw_tm_is_solicited(9), scsw_is_solicited(9)

mwah 💋 this cutie lives in ./arch/s390/include/asm, dated October 2026, and the page is scsw_is_valid_stctl(9) — bye bestie! 🫶