xa_get_mark(9)

💅 xa_get_mark(9) — Kernel API Manual ✨

okay so bestie, this is xa_get_mark(9) from the Kernel API Manual and it's literally the "is this lil mark on this entry?" checker 🎀 stay with me, it's short and it slays.

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🌸 NAME 🌸

xa_get_mark — Inquire whether this mark is set on this entry. that's it, that's the whole job 💖

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✨ SYNOPSIS ✨

bool xa_get_mark (struct xarray *xa , unsigned long index , xa_mark_t
mark );

it returns a bool, no cap 🫶

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🦋 ARGUMENTS 🦋

• xa — XArray. the actual array we're poking at 👑
• index — Index of entry. which slot we're looking at, iykyk 🔍
• mark — Mark number. which mark we're checking for, fr fr ⭐

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💜 DESCRIPTION 💜

okay so here's the tea: this function uses the RCU read lock. which means the result may be out of date by the time it returns 😭 like it literally could have changed the millisecond after handing you the answer.

so if you need the result to be stable, use a lock. that's not optional bestie, that's the whole caveat 🌈

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🧚 CONTEXT 🧚

Any context. Takes and releases the RCU lock. main character energy in every context honestly 👑✨

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🔥 RETURN 🔥

• True — if the entry at index has this mark set 💖
• false — if it doesn't 🫠

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🎀 SEE ALSO 🎀

Kernel file ./lib/xarray.c and the whole friend group:

• xas_load(9)
• xas_nomem(9)
• xas_free_nodes(9)
• xas_create_range(9)
• xas_store(9)
• xas_get_mark(9)
• xas_set_mark(9)
• xas_clear_mark(9)
• xas_init_marks(9)
• xas_split_alloc(9)
• xas_split(9)
• xas_try_split_min_order(9)
• xas_try_split(9)
• xas_pause(9)
• xas_find(9)
• xas_find_marked(9)
• xas_find_conflict(9)
• xa_load(9)
• __xa_erase(9)
• xa_erase(9)
• __xa_store(9)
• xa_store(9)
• __xa_cmpxchg(9)
• __xa_insert(9)
• xa_store_range(9)
• xas_get_order(9)
• xa_get_order(9)
• __xa_alloc(9)
• __xa_alloc_cyclic(9)
• __xa_set_mark(9)
• __xa_clear_mark(9)
• xa_set_mark(9)
• xa_clear_mark(9)
• xa_find(9)
• xa_find_after(9)
• xa_extract(9)
• xa_delete_node(9)
• xa_destroy(9)

like, that's the entire group chat, they all ate 💅

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and that's the page bestie 🥰 it lives under ./lib, dated October 2026 — mwah, go check your marks, ily 💜🦋🌸