DECLARE_FLEX_ARRAY(9)

💅 NAME 💅

Okay bestie, welcome to DECLARE_FLEX_ARRAY(9) from the Kernel API Manual ✨ This one is literally DECLARE_FLEX_ARRAY — and its whole job is to Declare a flexible array usable in a union. No cap 💖

✨ SYNOPSIS ✨

DECLARE_FLEX_ARRAY (TYPE , NAME );

🎀 ARGUMENTS 🎀

• TYPE — the type of each flexible array element 🦋
• NAME — the name of the flexible array member 🌸

🦋 DESCRIPTION 🦋

So here’s the vibe check: if you want a flexible array member inside a union, or just sitting alone in a struct, it has to be wrapped in an anonymous struct. That wrapper needs at least 1 named member — but plot twist, that member can be empty 🙈✨

🌈 SEE ALSO 🌈

Kernel file: ./include/linux/stddef.h 👑

• sizeof_field(9)
• offsetofend(9)
• struct_group(9)
• struct_group_attr(9)
• struct_group_tagged(9)
• __TRAILING_OVERLAP(9)
• TRAILING_OVERLAP(9)

mwah 💋 this lil page is from source/version ./include/linux, dated October 2026, and it’s DECLARE_FLEX_ARRAY(9) — bye bestie 🫶💖