inode_to_wb(9)

💖 inode_to_wb(9) 💖

okay so this is a page out of the Kernel API Manual and honestly? it's short, it's sweet, and it's about to hand you a writeback struct like it's your fave barista handing you your iced latte 🫶

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✨ NAME ✨

inode_to_wb — bestie, this one determines the wb of an inode. that's the whole job. no cap. 💅

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🌸 SYNOPSIS 🌸

struct bdi_writeback * inode_to_wb (const struct inode *inode );

look at that signature. it's giving "tiny function, big responsibilities." 👑

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🎀 ARGUMENTS 🎀

• inode — the inode of interest, aka the main character here 💫

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🦋 DESCRIPTION 🦋

so what does it actually do? it returns the wb inode is currently associated with. literally just hands you the wb, that's it, that's the vibe.

⚠️ okay but here's the part where you gotta pay attention: the caller must be holding one of these locks — inode->i_lock, the i_pages lock, or the associated wb's list_lock. like, you gotta. no skipping the lock, bestie, that's not cute and the kernel will absolutely notice 😭🔒

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⭐ SEE ALSO ⭐

go off, explore the whole friend group 💜

• Kernel file ./include/linux/backing-dev.h
• writeback_in_progress(9)
• inode_cgwb_enabled(9)
• wb_find_current(9)
• wb_get_create_current(9)
• unlocked_inode_to_wb_begin(9)
• unlocked_inode_to_wb_end(9)

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aaaand that's the whole page, bestie, you ate that 🍓✨ this little gem lives under ./include/linux and the whole thing is dated October 2026 — iconic of it, honestly. go forth, grab your locks, and slay 💅🌈👑