vmw_memcpy(9)

💅 vmw_memcpy — ok so this is the kernel API manual, section 9 (kernel API manual besties, we're in the docs!!)

Hiii so this page is literally about vmw_memcpy, which is a little wrapper around kernel memcpy that lets you plug it into a struct vmw_diff_cpy. That's the whole vibe. It's a plug-in-coded function, no cap 🫶

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✨ NAME ✨

vmw_memcpy — a wrapper around kernel memcpy with allowing to plug it into a struct vmw_diff_cpy. That's it, that's the gig 💅

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🌸 SYNOPSIS 🌸

void vmw_memcpy (struct vmw_diff_cpy *diff , u8 *dest , const u8 *src ,
size_t n );

Yes bestie, the spacing is exactly like that, I don't make the rules 😭 it's giving "written at 3am" energy but we respect it.

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🎀 ARGUMENTS 🎀

• diff — the struct vmw_diff_cpy closure argument. And plot twist: it's unused 🙈 literally just sitting there looking pretty. Main character energy but no lines, iykyk.
• dest — the copy destination 👑 this is where the bytes are going.
• src — the copy source 🌸 this is where the bytes are coming from. The origin story.
• n — number of bytes to copy 🔢 exactly that many, no more no less, periodt.

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🦋 SEE ALSO 🦋

Kernel file ./drivers/gpu/drm/vmwgfx/vmwgfx_blit.c — go read the source, it's right there, be so fr:

• vmw_find_first_diff(9)
• vmw_find_last_diff(9)
• vmw_adjust_rect(9)
• vmw_diff_memcpy(9)
• struct vmw_bo_blit_line_data(9)
• vmw_bo_cpu_blit_line(9)
• vmw_bo_cpu_blit(9)

Like a little friend group of functions, obsessed 🧚✨

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lowkey a note for the besties: every one of those SEE ALSO entries is either a page in section 9 or the actual kernel file, so if you're lost, that's your reading list 💖

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Ok bye ily, stay hydrated and remember: diff is unused, that's not a bug, that's just her journey 😭💀

Sign-off time!! This little masterpiece lives under ./drivers/gpu/drm/vmwgfx and it's dated October 2026 — yes, October 2026, she's from the future, slay ⭐👑🦋