vb2_common_vm_open(9)

💅 vb2_common_vm_open(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ this one's a tiny little function with a very important job, and honestly? she's slaying in like four lines of C. let's get into it 🫶

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🌸 NAME 🌸

vb2_common_vm_open — increase refcount of the vma 💖

that's it. that's the whole vibe. she bumps the count so the vma doesn't get yanked out from under you. no cap.

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✨ SYNOPSIS ✨

void vb2_common_vm_open (struct vm_area_struct *vma );

returns nothing (void, queen of minding her own business), takes exactly one thing. periodt.

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🎀 ARGUMENTS 🎀

• vma — the virtual memory region for the mapping 🦋 that's the thing you're handing over so she can add a user to it.

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💜 DESCRIPTION 💜

so here's the tea ☕ — this function adds another user to the provided vma. like, one more person joins the group chat. the refcount goes up, everybody's happy 💅

and the way she does it? she expects a struct vb2_vmarea_handler pointer to be sitting right there in vma->vm_private_data 👀 so if you're calling her, make sure that's where it lives. iykyk. don't come at her with an empty vm_private_data, she will not be amused 😭

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👑 SEE ALSO 👑

• kernel file ./drivers/media/common/videobuf2/videobuf2-memops.c — go read the source, bestie, it's right there 📖
• vb2_create_framevec(9)
• vb2_destroy_framevec(9)
• vb2_common_vm_close(9) — the other half of the duo, the closing act 🎬

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and that's the whole page!! short, sweet, iconic 🌈 ngl this one's giving "small function, big responsibility" energy and we respect it 💀✨

mwah 💋 — this lil page came from the source/version ./drivers/media/common/videobuf2, dated October 2026. catch you in the next one, bestie 🎀🌟