__switch_to(9)

💅 __switch_to — switching tasks like the main character

okay so bestie, welcome to the Kernel API Manual ✨ this little page is all about __switch_to(9), and honestly? it's giving core scheduling energy 🫶

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🌸 NAME 🌸

__switch_to — switch execution of a task 💫

like, literally, it swaps one task out and another one in, no cap.

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🎀 SYNOPSIS 🎀

struct task_struct * __switch_to (struct task_struct *prev , struct
       task_struct *next , void *sched_ra , void *sched_cfa );

that's the whole signature, keeping it exactly as-is because we do not mess with the facts 💅

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✨ ARGUMENTS ✨

• prev — the task that was previously executed, aka the one wrapping up its turn 😭
• next — the task that's about to begin executing, the one stepping into the spotlight 👑
• sched_ra — the __schedule return address 📍
• sched_cfa — the __schedule call frame address 📍

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💖 DESCRIPTION 💖

so here's the vibe: this function is used whilst scheduling to save the context of prev & load the context of next 🔥 it returns prev, fr fr.

that's it. that's the whole glow-up. saving the old context, loading the new one, handing prev back to you 🫶

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🦋 SEE ALSO 🦋

• Kernel file ./arch/loongarch/include/asm/switch_to.h — go read it, iykyk 💜

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🌈 quick reminder bestie: sched_ra and sched_cfa are the __schedule return address and call frame address respectively — don't forget what they stand for, it's on the quiz 💀

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and that's a wrap, babe 🎀 this page lives in ./arch/loongarch/include/asm, from the October 2026 era of the Kernel API Manual — slay, go schedule something iconic 💅✨