scsw_fctl(9)

💅 scsw_fctl — it's giving "give me the fctl field" ✨

Okay bestie, welcome to the Kernel API Manual corner of the universe 🎀 this one's a lil kernel API page, and honestly? It's short and sweet and I'm obsessed.

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🌸 NAME 🌸

scsw_fctl — returns the scsw fctl field, that's the whole gig 💖

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✨ SYNOPSIS ✨

u32 scsw_fctl (union scsw *scsw );

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🦋 ARGUMENTS 🦋

• scsw — a pointer to scsw. That's it. That's the arg. She's lowkey simple like that 💅

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🎀 DESCRIPTION 🎀

So what she does: scsw_fctl returns the value of the fctl field of the scsw you hand her, fr fr.

And here's the slay part 👑 — she does it regardless of whether it's a transport mode scsw or a command mode scsw. No vibe check needed, no "oops wrong mode" energy, she just hands you the fctl value either way. Iconic behavior honestly 😭

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🌈 SEE ALSO 🌈

The kernel file ./arch/s390/include/asm/scsw.h, plus literally her entire friend group 🫶 (yes, all of them, no cap):

• 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_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_is_valid_stctl(9)
• scsw_cmd_is_solicited(9)
• scsw_tm_is_solicited(9)
• scsw_is_solicited(9)

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💀 Reminder bestie: this page is short on purpose. Don't go inventing extra behavior for scsw_fctl — she returns the fctl field, both modes, done. Periodt.

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Okay that's the whole page, you ate that 🍓 this lil doc lives in ./arch/s390/include/asm and it's dated October 2026 — mwah, go read some scsw headers, ily, bye 💜🧚