wake_up_reservation(9)

💅 wake_up_reservation — the kernel API manual, but make it make sense 💅

okay so bestie, welcome to wake_up_reservation(9) from the Kernel API Manual — section 9, kernel routines, we're in the big leagues now 🎀 and yes this is about UBIFS, the file system, not your group chat, but honestly? same energy.

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✨ NAME ✨

wake_up_reservation — wake up the first task in the queue, or stop queuing entirely. like, either somebody's up next or the whole line is closed, no in-between 💅

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🌸 SYNOPSIS 🌸

void wake_up_reservation (struct ubifs_info *c );

that's it. one function, one argument, zero drama. she's simple, she's iconic 👑

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🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object. literally the whole personality of the file system in one struct, we love her for that 🫶

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💖 DESCRIPTION 💖

okay so here's the vibe: this function wakes up the first task in the queue if there actually is one sitting there waiting. and if there are no tasks in the queue? it stops queuing. no tasks, no queue, no problem, periodt ✨

it's giving "you're up, bestie" or "sorry, we're closed" and there is genuinely no third option, no cap 💀

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🌈 SEE ALSO 🌈

the whole friend group, fr fr — they all live in the kernel file ./fs/ubifs/journal.c:

• zero_ino_node_unused(9)
• zero_dent_node_unused(9)
• zero_trun_node_unused(9)
• reserve_space(9)
• write_head(9)
• __queue_and_wait(9)
• wait_for_reservation(9)
• add_or_start_queue(9)
• make_reservation(9)
• release_head(9)
• finish_reservation(9)
• get_dent_type(9)
• pack_inode(9)
• mark_inode_clean(9)
• ubifs_jnl_update(9)
• ubifs_jnl_write_data(9)
• ubifs_jnl_write_inode(9)
• ubifs_jnl_delete_inode(9)
• ubifs_jnl_xrename(9)
• ubifs_jnl_rename(9)
• truncate_data_node(9)
• ubifs_jnl_truncate(9)
• ubifs_jnl_delete_xattr(9)
• ubifs_jnl_change_xattr(9)

like, that's the entire squad, go read about all of them, iykyk 🧚

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lowkey a reminder that this page is section 9, living under ./fs/ubifs, and she's dated October 2026 — mark your calendars bestie 🗓️💜

and that's the page!! mwah, go wake up some tasks, you ate 💅🔥🍓