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include: one folder per subsystem, and includes that name it

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Sixty-five headers sat side by side in include/, so `#include "irq.h"`
said nothing about where irq.h was or what it belonged to, and errno.h,
stat.h and fcntl.h at the top shadowed the system's for any host tool
built with -I./include. They are in folders now -- arch/ core/ fs/
dev/ gfx/ net/ uapi/ (and ldls/ for the Linux driver layer) -- and
every include names the folder, as Linux's do: "core/proc.h".

Done mechanically and checked the hard way: the kernel built from this
tree disassembles identically to the one built from the tree before
it. The full image boots, and userland is the same set of programs.
Paths in docs and comments follow; docs/guides/layout.md has a table
of what is where, and tools/fix-includes.py rewrites old-style
includes from the folders in the tree, for code written before this.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
This commit is contained in:
Nexoniarz 2026-10-23 15:05:12 +02:00
commit a1c965da1e
267 changed files with 1560 additions and 1440 deletions
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2
.claude/memory/MEMORY.md
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@ -19,7 +19,7 @@
- [SchFS phase 2: real mount](schfs-phase2-mount.md) — mkschfs writes images, the kernel mounts them read-only; `make schfs-check`, plus four traps worth remembering.
- [SchFS phase 3: writes](schfs-phase3-writes.md) — full write API, free map derived not stored, and `mount -t schfs` works; the VFS now dispatches through `struct fs_ops`.
- [DIRSIZ 14 -> 30](schunix-dirsiz-14.md) — filenames used to truncate silently; fixed by holding the HTree bucket at 256 bytes.
- [Linux open flags](schunix-linux-open-flags.md) — include/fcntl.h must hold Linux's values; a mismatch made `>>` truncate.
- [Linux open flags](schunix-linux-open-flags.md) — include/uapi/fcntl.h must hold Linux's values; a mismatch made `>>` truncate.
- [Shared memory and mmap](schunix-shm-and-mmap.md) — shm + file-backed mmap work; pages you don't own must never reach kfree.
- [Wall clock](schunix-wall-clock.md) — the RTC was never read, so `date` said 1970; kernel/core/time.c fixes it, plus the stale-image trap.
- [TTF rasteriser](schunix-ttf-rasteriser.md) — glyf outlines (not CFF, and why); the composite-glyph trap that loses the letter "i".