tcw_set_data(9)

okay so welcome to tcw_set_data(9) from the Kernel API Manual — bestie, this one is short and cute, and it’s literally about setting a tcw’s data address and its tida flag 💅✨

🌸 NAME 🌸

tcw_set_data — set data address and tida flag of a tcw 🎀

🎀 SYNOPSIS 🎀

void tcw_set_data (struct tcw *tcw , void *data , int use_tidal );

🦋 ARGUMENTS 🦋

• tcw — the tcw address 🫶
• data — the data address ✨
• use_tidal — when it’s zero, the data address specifies a contiguous block of data; when it’s non-zero, it specifies a list of tidaws 🦋

✨ DESCRIPTION ✨

okay so this sets the input/output data address of a tcw — which one it is depends on the value of the r-flag and w-flag, iykyk 🔥

and if use_tidal is non-zero, the corresponding tida flag gets set too, periodt 💅

💖 SEE ALSO 💖

go peek at the Kernel file ./drivers/s390/cio/fcx.c and these iconic functions, fr fr:

• 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_tccb(9)
• tcw_set_tsb(9)
• tccb_init(9)
• tsb_init(9)
• tccb_add_dcw(9)
• tcw_add_tidaw(9)

later bestie 💖 — signed off from ./drivers/s390/cio, dated October 2026, and still serving tcw_set_data(9) realness 🫶🌈