kernfs_root_from_sb(9)

💅 kernfs_root_from_sb(9) — like, the kernel API manual edition 🎀

okay so bestie, welcome to section 9 of the Kernel API Manual, and today's main character is literally kernfs_root_from_sb 🦋 (yes the (9) is part of the name, it's giving "I have a section number and I'm proud of it").

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✨ NAME ✨

kernfs_root_from_sb — determine the kernfs_root associated with a super_block 🌸

like it just... finds the root for you. no cap, that's the whole gig 🫶

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🌈 SYNOPSIS 🌈

struct kernfs_root * kernfs_root_from_sb (struct super_block *sb );

that's it. one function, one arg, returns a pointer to a struct kernfs_root. iconic behavior honestly 💅

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🍓 ARGUMENTS 🍓

• sb — the super_block in question 👀 like, the one you're curious about. the subject of the vibe check, if you will.

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⭐ RETURN ⭐

it hands you back the kernfs_root associated with sb 🎀 — that's the whole point, that's the slay.

⚠️ but listen: if sb is not a kernfs one, NULL is returned. so fr fr, check that pointer before you dereference it, bestie 😭💀

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🔥 SEE ALSO 🔥

Kernel file ./fs/kernfs/mount.c — and honestly the whole squad:

• kernfs_node_dentry(9)
• kernfs_super_ns(9)
• kernfs_get_tree(9)
• kernfs_kill_sb(9)

go read them, iykyk 📚✨

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🧚 sign-off 🧚

this page lives in ./fs/kernfs, and it's dated October 2026 💖 so yeah, that's the source, that's the version, that's the date — go forth and find those roots, bestie. periodt. 👑🌈