idr_set_cursor(9)

💅 NAME 💅

idr_set_cursor — set the current position of the cyclic allocator, periodt. ✨

okay bestie, welcome to idr_set_cursor(9) from the Kernel API Manual. this is the little function that sets where the cyclic allocator’s cursor is currently pointing, and it’s giving “tiny but important” energy. 💅

🎀 SYNOPSIS 🎀

void idr_set_cursor (struct idr *idr , unsigned int val );

🌸 ARGUMENTS 🌸

• idr — the idr handle, aka the main character you’re moving the cursor inside. 💖
• val — the new position. the exact spot you want the cursor to be at, no cap. ✨

🦋 DESCRIPTION 🦋

okay so here’s the vibe: the next call to idr_alloc_cyclic will return val if it’s free. if it’s not free, the search will start from this position instead. that’s literally the whole tea. 💅

so yeah — val is your “please start here” request, and the allocator either returns it if it’s free or starts searching from that spot. 🫶

🔥 SEE ALSO 🔥

Kernel file: ./include/linux/idr.h — here’s the whole squad of related pages, bestie:

• IDR_INIT(9)
• DEFINE_IDR(9)
• idr_get_cursor(9)
• idr sync(9)
• idr_init_base(9)
• idr_init(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)

xoxo, your local kernel bestie 💖 — source/version: ./include/linux · date: October 2026 · page: idr_set_cursor(9) 🎀