compare_gpts(9)

🌸 NAME 🌸

okay so this is compare_gpts(9) from the Kernel API Manual, and its whole mission is to search the disk for valid GPT headers and PTEs. that’s the assignment, bestie 💅✨

✨ SYNOPSIS ✨

void compare_gpts (gpt_header *pgpt , gpt_header *agpt , u64 lastlba );

🎀 ARGUMENTS 🎀

• pgpt — the primary GPT header. main character energy 👑
• agpt — the alternate GPT header. the backup bestie 🫶
• lastlba — the last LBA number. literally exactly that, no cap 💖

💖 DESCRIPTION 💖

Returns nothing. like, actually nothing — void is giving minimalist icon behavior 😌✨

It sanity checks the pgpt and agpt fields and prints warnings on discrepancies. so if those two start disagreeing, this function is gonna call it out 📣💀

🔥 SEE ALSO 🔥

the kernel file is ./block/partitions/efi.c, and here’s the whole squad:

• efi_crc32(9)
• last_lba(9)
• is_pmbr_valid(9)
• read_lba(9)
• alloc_read_gpt_entries(9)
• alloc_read_gpt_header(9)
• is_gpt_valid(9)
• is_pte_valid(9)
• find_valid_gpt(9)
• utf16_le_to_7bit(9)
• efi_partition(9)

💌 that’s a wrap! source: ./block/partitions • date: October 2026 • this was compare_gpts(9) — byeee bestie, go check those GPT fields 🫶✨