STRUCT RPROC_SUBDEV(9)

🎀 NAME 🎀

okay so welcome to the Kernel API Manual, bestie 💖 — today's main character is struct rproc_subdev, which is literally just a subdevice tied to a remoteproc. that's the whole vibe. iykyk.

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✨ SYNOPSIS ✨

here's the glow-up, character for character, no cap:

struct rproc_subdev {
    struct list_head node;
    int (*prepare)(struct rproc_subdev *subdev);
    int (*start)(struct rproc_subdev *subdev);
    void (*stop)(struct rproc_subdev *subdev, bool crashed);
    void (*unprepare)(struct rproc_subdev *subdev);
 };

like... look at her. five members, all living their truth. 🦋

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💅 MEMBERS 💅

okay bestie let's go through the whole friend group one by one, no skipping, we are NOT summarising:

• node — the list node related to the rproc subdevs list. she's literally the link in the group chat that keeps everyone connected 🔗
• prepare — the prepare function, called before the rproc is started. so like, she gets ready before the party even begins 💄
• start — the start function, called after the rproc has been started. she shows up once the party's already going 🔥
• stop — the stop function, called before the rproc is stopped. and plot twist: the crashed parameter indicates if this originates from a recovery 😭 so if crashed is set, the vibe check failed and we're in recovery mode
• unprepare — the unprepare function, called after the rproc has been stopped. the "okay bestie goodnight" of the whole operation 🌙

🫶 note the order, babes: prepare → before start, start → after started, stop → before stopped, unprepare → after stopped. the sequencing is the whole point, don't freelance it.

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🔍 SEE ALSO 🔍

if you wanna keep reading (and you KNOW you do 👑), go check out the kernel file ./include/linux/remoteproc.h — she's the source of truth. and then these iconic neighbours:

• struct rproc_mem_entry(9)
• enum rsc_handling_status(9)
• struct rproc_ops(9)
• enum rproc_state(9)
• enum rproc_crash_type(9)
• enum rproc_dump_mechanism(9)
• struct rproc_dump_segment(9)
• enum rproc_features(9)
• struct rproc(9)
• struct rproc_vring(9)
• struct rproc_vdev(9)

like a whole friend group of structs and enums, we love to see it 🌈

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and that's the tea ☕ — this page came from ./include/linux, dated October 2026, and yes the title is still struct rproc_subdev(9) because legends never change their name 💜 slay, bye! 💅✨