binder_alloc_vma_close(9)

💅 binder_alloc_vma_close(9) — a Kernel API Manual moment

okay bestie, so this is a page from the Kernel API Manual and it's genuinely one of the shorter ones, so we can absolutely get through this together. grab a lil snack 🍓 and let's go.

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✨ NAME ✨

binder_alloc_vma_close — invalidate address space

like, that's the whole vibe. it invalidates an address space. no cap.

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🦋 SYNOPSIS 🦋

void binder_alloc_vma_close (struct binder_alloc *alloc );

that's it. that's the function. it returns void, so don't go looking for a return value, there isn't one, periodt.

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🎀 ARGUMENTS 🎀

• alloc — the binder_alloc for this proc. that's it, that's the one argument, she's lowkey carrying the whole function on her shoulders 💅

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🌸 DESCRIPTION 🌸

so here's the tea: this gets called from binder_vma_close when the address space is being released. that's the context, iykyk.

what does it actually do? it clears alloc->mapped, and the whole point of that is to stop new incoming transactions from allocating more buffers. like closing the door of the club so nobody else can get in 🚪✨ — the party's over, the buffers are done, no more crowding in.

no alloc->mapped, no new buffers. simple as that. iconic behaviour honestly.

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🔥 SEE ALSO 🔥

if you're the kind of person who goes down a rabbit hole (respect 🫶), here's where the rest of the lore lives:

• Kernel file ./drivers/android/binder_alloc.c
• binder_alloc_prepare_to_free(9)
• binder_alloc_new_buf(9)
• binder_alloc_get_page(9)
• binder_alloc_clear_buf(9)
• binder_alloc_free_buf(9)
• binder_alloc_mmap_handler(9)
• binder_alloc_print_allocated(9)
• binder_alloc_print_pages(9)
• binder_alloc_get_allocated_count(9)
• binder_alloc_free_page(9)
• binder_alloc_init(9)
• check_buffer(9)
• binder_alloc_copy_user_to_buffer(9)

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and that's the whole page, bestie — short, sweet, and to the point 🧚💜

this one came from ./drivers/android, dated October 2026, and yeah, it's the binder_alloc_vma_close(9) page, we been knew 👑

mwah, go clear that alloc->mapped responsibly 💖