DEFINE_XARRAY(9)

✨ DEFINE_XARRAY(9) ✨

okay bestie, welcome to the DEFINE_XARRAY(9) page from the Kernel API Manual — it's giving tiny “define an XArray” energy, and we're keeping every detail intact. No cap. 🫶💅

💖 NAME 💖

DEFINE_XARRAY — define an XArray. 🌸

🎀 SYNOPSIS 🎀

DEFINE_XARRAY (name );

🦋 ARGUMENTS 🦋

• name — a string that names your XArray. 💖

🧚 DESCRIPTION 🧚

So the intended use here is file scope definitions of XArrays. It declares and initialises an empty XArray with the chosen name. Calling xa_init on the array is equivalent, except this does the initialisation at compiletime instead of runtime. Periodt. ✨

bestie reminder: “file scope definitions” and “compiletime instead of runtime” are the whole point here, okay? 👑

🌈 SEE ALSO 🌈

Kernel file: ./include/linux/xarray.h

• xa_mk_value(9), xa_to_value(9), xa_is_value(9), xa_tag_pointer(9), xa_untag_pointer(9), xa_pointer_tag(9), xa_is_zero(9), xa_is_err(9), xa_err(9), struct xa_limit(9), struct xarray(9), DEFINE_XARRAY_FLAGS(9), DEFINE_XARRAY_ALLOC(9), DEFINE_XARRAY_ALLOC1(9)
• xa_init_flags(9), xa_init(9), xa_empty(9), xa_marked(9), xa_for_each_range(9), xa_for_each_start(9), xa_for_each(9), xa_for_each_marked(9)
• xa_store_bh(9), xa_store_irq(9), xa_erase_bh(9), xa_erase_irq(9), xa_cmpxchg(9), xa_cmpxchg_bh(9), xa_cmpxchg_irq(9), xa_insert(9), xa_insert_bh(9), xa_insert_irq(9)
• xa_alloc(9), xa_alloc_bh(9), xa_alloc_irq(9), xa_alloc_cyclic(9), xa_alloc_cyclic_bh(9), xa_alloc_cyclic_irq(9), xa_reserve(9), xa_reserve_bh(9), xa_reserve_irq(9), xa_release(9)
• xa_is_sibling(9), xa_is_retry(9), xa_is_advanced(9), xa_update_node_t(9), XA_STATE(9), XA_STATE_ORDER(9)
• xas_error(9), xas_set_err(9), xas_invalid(9), xas_valid(9), xas_is_node(9), xas_reset(9), xas_retry(9), xas_reload(9), xas_set(9), xas_advance(9), xas_set_order(9), xas_set_update(9), xas_next_entry(9), xas_next_marked(9), xas_for_each(9), xas_for_each_marked(9), xas_for_each_conflict(9), xas_prev(9), xas_next(9)

cute little sign-off: source ./include/linux, page/version DEFINE_XARRAY(9), dated October 2026 — slay, go define that XArray, bestie. 💖✨