sg_copy_to_buffer(9)

📦 version 7.3.1, in nixpkgs unstable

💫 sg_copy_to_buffer(9) 💫

Ok bestie, welcome to the Kernel API Manual, section 9 — yes, the kernel kernel, main character energy only. Today's episode: sg_copy_to_buffer, aka "copy from an SG list to a linear buffer" (that's the NAME section, and yes it literally tells you the whole plot in one line 🎀).

✨ SYNOPSIS ✨

size_t sg_copy_to_buffer (struct scatterlist *sgl , unsigned int nents ,
       void *buf , size_t buflen );

That's the whole signature, no cap — size_t in, size_t out, four args, periodt. 💅

🌸 ARGUMENTS 🌸

  • sgl — the SG list. like, the list. the source of truth, the moment, the vibe. 🦋
  • nents — number of SG entries. how many of them we're actually dealing with, fr fr.
  • buf — where to copy to. the destination. the glow-up location. ⭐
  • buflen — the number of bytes to copy. that's your budget, bestie, don't overspend. 🙈

💖 DESCRIPTION 💖

Returns the number of copied bytes.

That's it. That's the description. Short, iconic, ate and left no crumbs 👑 — it takes your SG list and copies stuff into a linear buffer, and then hands you back a size_t telling you how many bytes actually made it. lowkey the most honest function in the kernel ngl.

🔥 SEE ALSO 🔥

Buckle up babes, this is the friend group and it is huge 🫶. First, the location, in the kernel file ./lib/scatterlist.c:

bestie the way this list has twenty-eight entries and not one of them is filler 😭 go read them, iykyk.

ok that's the whole page, mwah 💋 — this lil masterpiece lives in ./lib, dated October 2026, and it's filed under sg_copy_to_buffer(9). see u in the next manpage, love u, bye 🧚💜

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