release_head(9)

release_head(9) 💖

okay so welcome to the Kernel API Manual, bestie — today's main character is release_head(9), and yes she's a little mysterious, but we love her anyway 🫶

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✨ NAME ✨

release_head — release a journal head.

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💅 SYNOPSIS 💅

void release_head (struct ubifs_info *c , int jhead );

That void up front? It means no return value, no drama, just vibes and side effects 💫

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🎀 ARGUMENTS 🎀

• c — UBIFS file-system description object. like, the whole filesystem context bestie, iconic.
• jhead — journal head. the specific one getting released, no cap.

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🌸 DESCRIPTION 🌸

okay so here's the tea: this function releases journal head jhead, which was locked by the make_reservation function. It has to be called after each successful — and yes, that's literally where the sentence ends in the source 😭 it's giving cliffhanger, but I'm not gonna invent extra words for it, periodt.

So: release the head, remember it was locked by make_reservation, and it has to be called after each successful (sentence ends here, bestie — no object after "successful", don't @ me) 💀

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🦋 SEE ALSO 🦋

the whole squad, straight from 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)
• wake_up_reservation(9)
• add_or_start_queue(9)
• make_reservation(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)

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okay bestie, that's the whole release_head(9) page! source/version footer: ./fs/ubifs · date: October 2026 · title: release_head(9) — bye, love u, drink water 🫶💖✨