idr_init(9)

💖 NAME

idr_init — Initialise an IDR. ✨

🌸 SYNOPSIS

void idr_init (struct idr *idr );

🎀 ARGUMENTS

• idr — the IDR handle. that's your main character right there 💅

🦋 DESCRIPTION

okay so this is how you initialise a dynamically allocated IDR. it's giving setup era, it's giving fresh start, it's giving "bestie, your IDR is ready" 💖

if your IDR is statically allocated instead, this is not the one — use DEFINE_IDR. no cap, that's literally the instruction. 🫶

👑 SEE ALSO

the kernel file ./include/linux/idr.h is where this whole friend group lives, and here's the full crew:

• IDR_INIT(9)
• DEFINE_IDR(9)
• idr_get_cursor(9)
• idr_set_cursor(9)
• idr sync(9)
• idr_init_base(9)
• idr_is_empty(9)
• idr_preload_end(9)
• idr_for_each_entry(9)
• idr_for_each_entry_ul(9)
• idr_for_each_entry_continue(9)
• idr_for_each_entry_continue_ul(9)
• ida_alloc(9)
• ida_alloc_min(9)
• ida_alloc_max(9)

source/version and date for this little manual moment: ./include/linux and October 2026 — slay, bye bestie 💅✨