wait_for_reservation(9)

💅 wait_for_reservation(9) — from the Kernel API Manual, bestie 🫶

okay so real talk, this one's a little cutie from the wait_for_reservation(9) corner of the Kernel API Manual, and she's lowkey just here to make your task wait its turn. let's get into it ✨

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🌸 NAME 🌸

wait_for_reservation — try queuing current task to wait until waked up.

like literally, that's the whole gig. she queues, she waits, she gets woken up. no cap 💅

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🎀 SYNOPSIS 🎀

bool wait_for_reservation (struct ubifs_info *c );

that's it. one arg, returns a bool. iconic behavior honestly 💖

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🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object. your main character struct, fr fr 👑

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⭐ DESCRIPTION ⭐

so here's the vibe check 📋 — this function queues the current task to wait until it gets waked up, but only if queuing is started, meaning c->need_wait_space is not 0.

it returns true if the current task actually got added in the queue 😭🫶, otherwise false is returned. that's the whole story, bestie, no plot twist 🌈

ngl, that c->need_wait_space is not 0 check is the moment the whole function decides whether it's even participating. respect 💀

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🔥 SEE ALSO 🔥

kernel file ./fs/ubifs/journal.c — and honestly the whole friend group is here, so let's list every single one, periodt:

• 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)
• wake_up_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, the entire friend group chat showed up to the function party 🧚💜

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and that's the page, bestie!! 🍓 this little icon came from ./fs/ubifs, version stamp October 2026, and it's literally signed wait_for_reservation(9) at the bottom — mwah, slay, bye 💅💖✨