rdma_user_mmap_entry_remove(9)

💅 rdma_user_mmap_entry_remove — a Kernel API Manual moment 🎀

okay bestie, so this one lives in the Kernel API Manual and it's literally called rdma_user_mmap_entry_remove(9) and it's giving "closing the door but not kicking anyone out" energy, iykyk ✨

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✨ NAME ✨

rdma_user_mmap_entry_remove — drop reference to entry and mark it as unmmapable 🫶

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🌸 SYNOPSIS 🌸

void rdma_user_mmap_entry_remove (struct rdma_user_mmap_entry *entry );

like, that's the whole signature, no cap 💅

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🦋 ARGUMENTS 🦋

• entry — the entry to insert into the mmap_xa. yes queen, that's what it says, that's the entry bestie 🎀

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🔥 DESCRIPTION 🔥

So here's the tea, bestie: drivers can call this to prevent userspace from creating more mappings for entry 💀

but — and this is the important part, don't skip it — existing mmaps continue to exist 😭 and ops->mmap_free will not be called until all user mmaps are destroyed. so it's not a "delete everything" button, it's a "no new friends" button, fr fr ✨

lowkey the main character detail here: the entry stays alive as long as any user mmap is still breathing. no take-backs until they're all gone 👑

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/infiniband/core/ib_core_uverbs.c
• rdma_umap_priv_init(9)
• rdma_user_mmap_io(9)
• rdma_user_mmap_entry_get_pgoff(9)
• rdma_user_mmap_entry_get(9)
• rdma_user_mmap_entry_put(9)
• rdma_user_mmap_entry_insert_range(9)
• rdma_user_mmap_entry_insert(9)
• rdma_udata_to_dev(9)
• _uverbs_alloc(9)
• uverbs_get_buffer_desc(9)

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okay that's the page!! 💖 this lil icon came from ./drivers/infiniband/core and it's dated October 2026, and yep, the manual page name is rdma_user_mmap_entry_remove(9) — go off, bestie, you ate 🍓🧚‍♀️🌟