fs_bdev_file_release(9)

🎀 fs_bdev_file_release(9) — your fave Kernel API Manual entry 🎀

okay so this is fs_bdev_file_release(9) from the Kernel API Manual, and it's literally the bestie move for a block device that got claimed for a superblock. no cap, the whole vibe is: unregister the entry, then close the device. 💅

💖 NAME 💖

fs_bdev_file_release - release a block device claimed for a superblock

✨ SYNOPSIS ✨

void fs_bdev_file_release (struct file *bdev_file , struct super_block
       *sb );

🫶 ARGUMENTS 🫶

• bdev_file — the file returned by fs_bdev_file_open_by_{dev,path}(); yes, that exact brace-y bestie. 🦋
• sb — the superblock the device was claimed for. iconic claim energy, fr. 👑

🌸 DESCRIPTION 🌸

Unregister the {dev, sb} entry, then close the block device. that's it — unregister then close, in that order, periodt. 💅✨

🦋 SEE ALSO 🦋

Kernel file ./fs/super.c — plus all these linked icons, fr fr:

• super_lock(9)
• alloc_super(9)
• deactivate_locked_super(9)
• deactivate_super(9)
• grab_super(9)
• retire_super(9)
• generic_shutdown_super(9)
• sget_fc(9)
• iterate_supers_type(9)
• reconfigure_super(9)
• emergency_thaw_all(9)
• get_anon_bdev(9)
• sget_dev(9)
• fs_bdev_freeze(9)
• fs_bdev_thaw(9)
• fs_bdev_file_open_by_dev(9)
• fs_bdev_file_open_by_path(9)
• fs_bdev_unregister(9)
• get_tree_bdev_flags(9)
• get_tree_bdev(9)
• vfs_get_tree(9)
• sb_wait_write(9)
• freeze_super(9)
• thaw_super(9)

mwah 💋 — thanks for coming to my Kernel API Manual TED talk — source/version: ./fs; date: October 2026; page title: fs_bdev_file_release(9) 🫶✨