mmap_action_prepare(9)

✨ mmap_action_prepare — the little pre-game ritual for your VMA descriptor 💅

okay so bestie, welcome to the mmap_action_prepare(9) page from the Kernel API Manual — yes it's a real kernel function, yes it's lowercase-screaming at you, and yes we're gonna get through it together 🫶

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🌸 NAME 🌸

mmap_action_prepare — does the prep work for a VMA descriptor action that actually needs to get done. It's literally the "get ready with me" step before the action goes on stage ✨

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🦋 SYNOPSIS 🦋

int mmap_action_prepare (struct vm_area_desc *desc );

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🎀 ARGUMENTS 🎀

• desc — the VMA descriptor you're getting all set up for its own desc->action. That's the whole assignment. Just make it ready 💖

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⭐ RETURN ⭐

Returns 0 on success — slay. Otherwise you get an error. That's it, that's the contract 👑

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🌈 SEE ALSO 🌈

okay this list is LONG but every single one of these is invited to the party, no plus-ones skipped:

The kernel files ./mm/util.c and then kfree_const(9), __kmemdup_nul(9), kstrdup(9), kstrdup_const(9), kstrndup(9), kmemdup(9), kmemdup_array(9), kvmemdup(9), kmemdup_nul(9), memdup_user(9), vmemdup_user(9), strndup_user(9), memdup_user_nul(9), randomize_page(9), __account_locked_vm(9), account_locked_vm(9), __vmalloc_array(9), vmalloc_array(9), __vcalloc(9), vcalloc(9), folio_mapping(9), folio_copy(9), get_cmdline(9), mem_dump_obj(9), compat_set_desc_from_vma(9), __compat_vma_mmap(9), compat_vma_mmap(9), snapshot_page(9), mmap_action_complete(9), folio_pte_batch(9), and page_range_contiguous(9).

ngl, that's a whole friend group. read them all, iykyk 💀

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mwah 💋 — this page lives in ./mm, it's dated October 2026, and the whole thing is filed under mmap_action_prepare(9). that's the sign-off bestie, go prepare your descriptors 💅✨