tcw_add_tidaw(9)

💅 tcw_add_tidaw(9) — from the Kernel API Manual, bestie

okay so like, welcome to tcw_add_tidaw(9), a kernel API manual page, and no cap it's actually a vibe. Let's get into it 🫶

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✨ NAME ✨

tcw_add_tidaw — add a tidaw to a tcw 💖

(yes that's the whole name section. short. iconic. periodt.)

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🎀 SYNOPSIS 🎀

struct tidaw * tcw_add_tidaw (struct tcw *tcw , int num_tidaws , u8
       flags , void *addr , u32 count );

literally just look at it. it returns a struct tidaw *, bestie 🌸

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🌈 ARGUMENTS 🌈

• tcw — the tcw address. the main character, fr.
• num_tidaws — the current number of tidaws. like, how many we already got.
• flags — flags for the new tidaw 🚩
• addr — address value for the new tidaw.
• count — count value for the new tidaw.

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🦋 DESCRIPTION 🦋

So what does it do? It adds a new tidaw to the input/output data tidaw-list of the specified tcw — and which list depends on the value of the r-flag and w-flag, iykyk — and then it returns a pointer to the new tidaw. slay. ✨

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💀 NOTE 💀

okay listen up because this part matters:

the tidaw-list is assumed to be contiguous with no ttics. 🚨

The caller must ensure that there is enough space for the new tidaw — that's on you, bestie, not on the function. Also, the last-tidaw flag for the last tidaw in the list will be set by tcw_finalize. so don't go setting it yourself, that's not your moment 💅

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👑 SEE ALSO 👑

Kernel file ./drivers/s390/cio/fcx.c

• tcw_get_intrg(9)
• tcw_get_data(9)
• tcw_get_tccb(9)
• tcw_get_tsb(9)
• tcw_init(9)
• tcw_finalize(9)
• tcw_set_intrg(9)
• tcw_set_data(9)
• tcw_set_tccb(9)
• tcw_set_tsb(9)
• tccb_init(9)
• tsb_init(9)
• tccb_add_dcw(9)

go read them all, they ate 🔥

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and that's the page! 🎀 this whole thing lives in ./drivers/s390/cio and it's dated October 2026 — mark your calendars bestie, mwah 💜