arch_stack_walk_reliable(9)

💅 arch_stack_walk_reliable(9) — the kernel API manual, bestie edition 💅

okay so picture this: you're deep in the kernel, and you need the architecture-specific function that walks the stack reliably. like, no cap reliable. that's this one, and it lives in the Kernel API Manual. hi bestie, welcome to the stack walk of your dreams ✨

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🌸 NAME 🌸

arch_stack_walk_reliable — the Architecture specific function to walk the stack reliably. that's the whole vibe. it walks stacks, it does it reliably, and it's arch-specific, periodt 🎀

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🦋 SYNOPSIS 🦋

int arch_stack_walk_reliable (stack_trace_consume_fn consume_entry ,
void *cookie , struct task_struct *task );

look at her go. three args, one int out. iconic 😌

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💖 ARGUMENTS 💖

• consume_entry — the Callback 🫶 the architecture code invokes this bad boy for each entry it finds. every single one. she's the main character of this whole operation, honestly.
• cookie — the Caller supplied pointer that gets handed back to consume_entry. it's like a little note you pass around the group chat — you give it out, and it comes right back to you. iykyk 🍓
• task — a Pointer to a task struct. and yes, it can be NULL. no drama, she's flexible like that 💅

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🌈 RETURN 🌈

it returns a negative error code if it detects any unreliable features of the stack — like, it caught the stack being sus and it's telling you nope 🙈

otherwise? it guarantees that the stack trace is reliable and returns 0. that 0 is the slay. that 0 is the win. take the 0 and go 👑

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⭐ DESCRIPTION ⭐

okay so here's the one thing you literally cannot skip: if the task is not 'current', the caller must ensure the task is inactive and its stack is pinned.

bestie i'm so serious about this one. not 'current'? then you must make sure the task is inactive AND its stack is pinned. no exceptions, no vibes-based shortcuts 💀

that's it. that's the whole description. short and devastating, honestly 🧚

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🔥 SEE ALSO 🔥

• the Kernel file ./include/linux/stacktrace.h
• stack_trace_consume_fn(9)
• arch_stack_walk(9)

go read them, they're literally right there 🫶

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and that's the page!! source/version is ./include/linux, dated October 2026, and the whole thing answers to the name arch_stack_walk_reliable(9) — like a little signature at the bottom of the group chat. bye bestie, walk those stacks safely 💜🎀✨