klp_shadow_free(9)

💅 klp_shadow_free(9)

okay bestie, welcome to the kernel API manual, section 9, and today's main character is klp_shadow_free(9) — the "we're SO done here" of the shadow variable world 🦋

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✨ NAME ✨

klp_shadow_free — detach and free a <obj, id> shadow variable, periodt 💅

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🎀 SYNOPSIS 🎀

void klp_shadow_free (void *obj , unsigned long id , klp_shadow_dtor_t
dtor );

like yes, that's the whole thing, no cap ✨

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🌸 ARGUMENTS 🌸

• obj — pointer to the parent object, aka the thing this shadow variable is vibing next to 🫶
• id — the data identifier, it's giving "which shadow are we talking about" energy
• dtor — a custom callback you can use to unregister the variable and/or free the data that the shadow variable points to. it's optional, so no pressure bestie 🙈

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💖 DESCRIPTION 💖

so basically this function releases the memory for this <obj, id> shadow variable instance. that's it, that's the whole job 👑

and because the memory is literally gone after this, callers should stop referencing it accordingly — like, do not keep holding onto that pointer, it's not coming back, the vibe check has been failed 💀

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🔥 SEE ALSO 🔥

• Kernel file ./kernel/livepatch/shadow.c
• Shadow variable API concurrency notes:(9)
• struct klp_shadow(9)
• klp_shadow_match(9)
• klp_shadow_get(9)
• klp_shadow_alloc(9)
• klp_shadow_get_or_alloc(9)
• klp_shadow_free_all(9)

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and that's the page!! 🧚 source vibes straight out of ./kernel/livepatch, dated October 2026, manual name klp_shadow_free(9) — go free those shadows responsibly, ilysm 💜⭐