xa_store_irq(9)

💾 xa_store_irq — the (9) Kernel API Manual page, bestie edition ✨

Okay so quick vibe check: this is a Kernel API Manual page, and today's main character is xa_store_irq. It's short, it's sweet, it's giving "small but mighty" 🎀

🌸 NAME 🌸

xa_store_irq — bestie, it stores this entry in the XArray. That's it. That's the whole job. 💅

✨ SYNOPSIS ✨

void * xa_store_irq (struct xarray *xa , unsigned long index , void
*entry , gfp_t gfp );

🫶 ARGUMENTS 🫶

• xa — the XArray itself. The whole container, the moment, the icon. 👑
• index — the index into the array. Where you're parking your stuff. 📍
• entry — the new entry. Like, the actual thing you're storing. 🌟
• gfp — the memory allocation flags. The boring-but-important admin details, no cap. 🧾

💖 DESCRIPTION 💖

So this function is literally just like calling xa_store… except — and this is the whole personality — it disables interrupts while holding the array lock. That's the entire difference, and it's kind of iconic of it, honestly. 🦋

🔥 CONTEXT 🔥

Process context, bb. It takes and releases the xa_lock while disabling interrupts. Both of those things. At the same time. Multitasking queen behavior. 👑

Lowkey do not lose track of that detail — the interrupt-disabling is the whole reason this variant exists. 🙈

⭐ RETURN ⭐

It hands you back the old entry at this index — or xa_err if an error happened. So either a little gift from the past, or a little error situation. Either way, check it. 💀

🌈 SEE ALSO 🌈

Kernel file ./include/linux/xarray.h, plus a genuinely massive friend group of related calls: 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(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_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) — iykyk, it's a whole scene. 💜

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And that's the page, bestie! 🎀 This little cutie lives in ./include/linux and the version/date stamp on it is October 2026 — so mark your calendar, screenshot it, frame it, whatever. Slay. 💅✨🦋