scsw_cmd_is_valid_fctl(9)

✨ scsw_cmd_is_valid_fctl ✨

okay bestie, this one's a kernel API manual page (section 9, iykyk) for a lil s390 helper and honestly it's short and sweet — we love a low-effort queen 💅

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🌸 NAME 🌸

scsw_cmd_is_valid_fctl — the vibe check for the fctl field 🎀

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🦋 SYNOPSIS 🦋

int scsw_cmd_is_valid_fctl (union scsw *scsw );

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💖 ARGUMENTS 💖

• scsw — pointer to scsw. that's it. that's the whole argument list. she's low maintenance ✨

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👑 DESCRIPTION 👑

okay so here's the tea 🍵: this function returns non-zero if the fctl field of the specified command mode scsw is valid, and zero otherwise. literally that's it. a yes-or-no girlie. no cap 💀

so like — valid → nonzero, not valid → zero. iconic behaviour, no notes 🙈

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🌈 SEE ALSO 🌈

everything is connected bestie, this header is Kernel file ./arch/s390/include/asm/scsw.h and it's giving main character energy 🫶

• struct cmd_scsw(9), struct tm_scsw(9), struct eadm_scsw(9), union scsw(9) — the whole struct family 🧚
• 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) — the field getters ⭐
• 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_actl(9), scsw_cmd_is_valid_stctl(9), scsw_cmd_is_valid_dstat(9), scsw_cmd_is_valid_cstat(9) — the command-mode validity squad, our girl is literally one of these 💅
• 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) — the tm-mode validity crew 🦋
• 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_is_valid_stctl(9) — the generic validity babes 🌸
• scsw_cmd_is_solicited(9), scsw_tm_is_solicited(9), scsw_is_solicited(9) — and the solicited trio, because sometimes you gotta know if it reached out first 😌

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fr fr bestie: fctl is a command mode thing — don't go pointing this at the wrong mode and acting surprised, k? 🫶

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and that's the whole page 💖 written in ./arch/s390/include/asm, dated October 2026, and sourced from the Kernel API Manual — ty for coming to my ted talk, periodt 👑⭐