loop_global_lock_killable(9)

🌸 NAME 🌸

Okay so bestie, this is loop_global_lock_killable(9) from the Kernel API Manual — it does exactly this: take locks for a safe loop_validate_file() test. Slay. 💅

✨ SYNOPSIS ✨

int loop_global_lock_killable (struct loop_device *lo , bool global );

🎀 ARGUMENTS 🎀

• lo — a struct loop_device, iconic.
• global — true if lo is about to bind another "struct loop_device", and false otherwise.

💅 DESCRIPTION 💅

Returns 0 on success, and -EINTR otherwise. No cap. ✨

Since loop_validate_file traverses on other "struct loop_device" if is_loop_device is true, we need a global lock for serializing concurrent loop_configure/loop_change_fd/__loop_clr_fd calls. Like, that's the whole point, bestie — keep those concurrent calls from stepping on each other. 🫶

🦋 SEE ALSO 🦋

Kernel file ./drivers/block/loop.c:

• loop_global_unlock(9)
• loop_set_size(9)
• loop_set_status_from_info(9)

Sign-off time 🫶: source/version is ./drivers/block, dated October 2026 — that's the whole loop_global_lock_killable(9) page, periodt. 💖🎀