font_data_put(9)

📦 version 7.3.1, in nixpkgs unstable

💅 font_data_put(9) — the Kernel API Manual, bestie edition ✨

okay so real talk, we're digging into font_data_put from the Kernel API Manual, section 9, and honestly? she's a tiny little function with main character energy. let's get into it 🎀

🌸 NAME 🌸

font_data_put — literally just releases a reference on font data. that's her whole job. slay 💅

✨ SYNOPSIS ✨

bool font_data_put (font_data_t *fd );

that's it. that's the whole vibe. one arg, one bool, no drama 🦋

🫶 ARGUMENTS 🫶

  • fd — the font data. that's the whole thing, bestie, that's what you're handing over 💖

🔥 DESCRIPTION 🔥

okay so here's the lore: font data that comes from user space is reference counted. like, the kernel is keeping tabs on how many people are holding onto it, very responsible of her ngl 👑

what font_data_put does is super simple — the helper decreases the reference counter by one. that's it. one (1) single decrement. iconique.

and if this was, like, the final reference? 😭 then she goes ahead and frees the allocated memory. the end of an era tbh. the friend group is officially empty, so the lights go off 🌈

🚨 but wait — plot twist! Internal font data lives in read-only memory. you cannot touch it. you cannot free it. so in that specific case, the helper just returns success without modifying the counter field. she knows better than to mess with read-only memory, and honestly? respect 💀

⭐ RETURN ⭐

  • True — if the font data's memory buffer has actually been freed 🎉 (the memory said goodbye)
  • false — otherwise, no freeing happened, we move on gracefully 🙈

🦋 SEE ALSO 🦋

go check out the kernel file ./lib/fonts/fonts.c and these absolute legends:

and that's the whole page, bestie 💜 no cap, every single detail is there, the vibe check passed, periodt ✨

kisses from the ./lib/fonts directory — she's stamped October 2026 and she's not sorry about it 🎀 💖 🌸

📦 where this page comes from