clear_user(9)

💅 clear_user(9) 💅

okay so bestie, this is clear_user(9) from the Kernel API Manual 🫶✨. It’s giving “zero out a chunk of user-space memory” energy and honestly? iconic. no cap.

✨ NAME ✨

clear_user — Zero a block of memory in user space. 🧼💖

📜 SYNOPSIS 📜

unsigned long clear_user (void __user *to , unsigned long n );

🎀 ARGUMENTS 🎀

• to — Destination address, in user space. That’s where the zeroing party starts 🎯
• n — Number of bytes to zero. That’s how many bytes are getting the treatment ✨

🌸 DESCRIPTION 🌸

Zero a block of memory in user space. periodt. It’s literally that: you hand it a user-space destination and a byte count, and it zeroes that block. 🧚💜

🔥 RETURN 🔥

The number of bytes that could not be cleared. On success, this will be zero. So 0 is the main-character outcome — anything else means some bytes did not get cleared 😭💅

👀 SEE ALSO 👀

• Kernel file ./arch/x86/lib/usercopy_32.c
• __clear_user(9)

💖 that’s a wrap, bestie! source/version: ./arch/x86/lib · date: October 2026 · page: clear_user(9) — mwah 💋