zfcp_reqlist_apply_for_all(9)

💅 zfcp_reqlist_apply_for_all — it's giving "main character energy" ✨

okay so bestie, welcome to the Kernel API Manual page for zfcp_reqlist_apply_for_all(9) 🎀 — yes we're in the kernel, yes we're in s390/scsi territory, and yes this function is literally the group-chat admin of request lists: it just goes down the whole list and pings everyone. 🫶

---

✨ NAME ✨

zfcp_reqlist_apply_for_all — apply a function to every request. that's it, that's the vibe. every single one. no skips, no "seen", no leaving anybody on read 💅

---

🦋 SYNOPSIS 🦋

void zfcp_reqlist_apply_for_all (struct zfcp_reqlist *rl , void
(*f)(struct zfcp_fsf_req *, void *) , void *data );

copy it exactly, don't @ me, the compiler is watching 👀

---

🌸 ARGUMENTS 🌸

• rl — the requestlist that contains the target requests. this is the container, the whole little friend group 🎀
• f — the function to apply to each request ✨ the first parameter of the function will be the target-request; the second parameter is the same pointer as given with the argument data. so like, f gets the request AND your little care-package pointer. slay.
• data — freely chosen argument; passed through to f as second parameter. literally anything you want, it's your emotional support pointer 💜

---

🔥 DESCRIPTION 🔥

So how does it actually do the thing? It uses list_for_each_entry (that's the :c:macro: one, iykyk) to iterate over the lists in the hash-table ⭐

🚨 not a 'safe' variant, so don't modify the list. fr fr. it's not safe — do not touch the list while you're in there, no adding, no removing, no sneaky edits. it's giving "look but don't touch" energy 💀

Also highkey important: it holds rl->lock over the entire request-iteration 🔒 so the whole walk happens under the lock, the entire time, no cap. the lock stays held, periodt.

---

👑 SEE ALSO 👑

Kernel file ./drivers/s390/scsi/zfcp_reqlist.h, plus the whole squad:

• struct zfcp_reqlist(9)
• zfcp_reqlist_alloc(9)
• zfcp_reqlist_isempty(9)
• zfcp_reqlist_free(9)
• zfcp_reqlist_find(9)
• zfcp_reqlist_find_rm(9)
• zfcp_reqlist_add(9)
• zfcp_reqlist_move(9)

bestie these are literally the rest of the friend group, go read them too 🌈💖

---

okay that's the whole page, mwah 😘 — this iconic little number lives in ./drivers/s390/scsi, dropped October 2026, straight from the Kernel API Manual, and its full government name is zfcp_reqlist_apply_for_all(9) 🧚‍♀️🍓 go forth and apply functions to every request, you absolute icon 💅✨