unregister_fprobe(9)

💅 unregister_fprobe(9) 💅

okay so bestie, welcome to section 9 of the Kernel API Manual — that's the kernel API girlies' section, and today's main character is unregister_fprobe. no cap, this one's important, so let's get into it 🫶

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🌸 NAME 🌸

unregister_fprobe — unregister an fprobe, and like… wait for an RCU GP while you're at it. the way that grace period is literally the whole personality of this function 😭

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✨ SYNOPSIS ✨

int unregister_fprobe (struct fprobe *fp );

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🎀 ARGUMENTS 🎀

• fp — the fprobe data structure that's getting unregistered, bestie. that's the one. she's the target 🎯

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💖 DESCRIPTION 💖

so what she does is ✨ unregister the fprobe ✨ — and like, also remove the ftrace hooks from the function entries, because obviously we're not leaving those behind 💅

and here's the iconic part: this function will block until the fprobe is no longer used. yes queen, she waits. she does not leave until it's safe. main character energy fr fr 👑

Return 0 if fp is unregistered successfully, -errno if not. that's it, that's the vibe check 🌈

ngl bestie, if you get -errno back, something did not slay. check your return value, always 💀

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🦋 SEE ALSO 🦋

• Kernel file ./kernel/trace/fprobe.c
• register_fprobe(9)
• register_fprobe_ips(9)
• register_fprobe_syms(9)
• unregister_fprobe_async(9)

like yes, go read the whole friend group, they're all in ./kernel/trace/fprobe.c together 🧚

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okay that's the page!! and if you were wondering where this masterpiece lives — it's the ./kernel/trace source, dated October 2026, from your fave Kernel API Manual 💜 byeee, go unregister responsibly 🍓⭐