wbuf_timer_callback_nolock(9)

💅 wbuf_timer_callback_nolock(9) 💅

okay bestie, so this is a page straight out of the Kernel API Manual — yes, the kernel, as in the actual heart of your operating system, and yes we are going to understand it together 🫶 it's a (9) section page which is the "kernel internals" section, iykyk.

---

✨ NAME ✨

wbuf_timer_callback_nolock — the write-buffer timer callback function, no cap 💫 that's literally its whole job description.

---

🎀 SYNOPSIS 🎀

enum hrtimer_restart wbuf_timer_callback_nolock (struct hrtimer *timer
);

so it takes one thing, it gives you back an enum hrtimer_restart, and honestly? iconic signature behavior ✨

---

🌸 ARGUMENTS 🌸

• timer — the timer data, which is also the write-buffer descriptor. two jobs, one struct, main character energy fr fr 👑

---

🦋 DESCRIPTION 🦋

okay so here's the vibe: this function gets called when the write-buffer timer expires ⏰ that's it, that's the whole moment. the timer goes off, this bad boy runs. periodt 💅

---

💜 SEE ALSO 💜

this is the part where the manpage just lists, like, everyone this function hangs out with — and we are NOT skipping a single one, because they're all part of the friend group 🫶 the whole crew lives in the kernel file ./fs/ubifs/io.c:

• ubifs_ro_mode(9)
• ubifs_check_node(9)
• ubifs_pad(9)
• next_sqnum(9)
• ubifs_prepare_node_hmac(9)
• ubifs_prepare_node(9)
• ubifs_prep_grp_node(9)
• new_wbuf_timer_nolock(9)
• cancel_wbuf_timer_nolock(9)
• ubifs_wbuf_sync_nolock(9)
• ubifs_wbuf_seek_nolock(9)
• ubifs_bg_wbufs_sync(9)
• ubifs_wbuf_write_nolock(9)
• ubifs_write_node_hmac(9)
• ubifs_write_node(9)
• ubifs_read_node_wbuf(9)
• ubifs_read_node(9)
• ubifs_wbuf_init(9)
• ubifs_wbuf_add_ino_nolock(9)
• wbuf_has_ino(9)
• ubifs_sync_wbufs_by_inode(9)

like, twenty-one whole references 💀 that's a squad, that's a whole group chat, and every single one of them is in the kernel file ./fs/ubifs/io.c — go say hi 🧚

---

ngl bestie, if you ever find yourself in ./fs/ubifs chasing timer callbacks, you're already doing amazing sweetie 💖

---

and that's the page!! 🌈 this one came from the ./fs/ubifs source, dated October 2026, and it belongs to the Kernel API Manual — so go forth, read your write-buffer timer callbacks, and slay 💅👑🍓