include: one folder per subsystem, and includes that name it
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
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267 changed files with 1560 additions and 1440 deletions
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// SPDX-License-Identifier: GPL-2.0-or-later
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//
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// What the kernel uses AML for. See include/acpi.h.
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// What the kernel uses AML for. See include/dev/acpi.h.
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//
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// Interrupt routing is the reason this exists. A PCI device's config space
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// names an interrupt line, but that number is the 8259's: the firmware
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@ -16,15 +16,15 @@
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// power button powers it off cleanly, and power-off and reset go through the
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// firmware's own registers rather than an emulator's magic ports.
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#include "types.h"
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#include "defs.h"
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#include "param.h"
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#include "x86.h"
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#include "spinlock.h"
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#include "pci.h"
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#include "irq.h"
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#include "acpi.h"
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#include "fat.h"
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#include "core/types.h"
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#include "core/defs.h"
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#include "core/param.h"
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#include "arch/x86.h"
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#include "core/spinlock.h"
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#include "dev/pci.h"
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#include "core/irq.h"
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#include "dev/acpi.h"
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#include "fs/fat.h"
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#include <uacpi/uacpi.h>
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#include <uacpi/utilities.h>
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// uacpi_kernel_schedule_work(), from interrupt context, where AML must not
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// run. That is the "acpi" kernel thread's whole job.
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#include "types.h"
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#include "defs.h"
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#include "param.h"
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#include "memlayout.h"
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#include "mmu.h"
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#include "x86.h"
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#include "spinlock.h"
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#include "proc.h"
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#include "irq.h"
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#include "dma.h"
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#include "kmem.h"
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#include "acpi.h"
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#include "core/types.h"
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#include "core/defs.h"
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#include "core/param.h"
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#include "arch/memlayout.h"
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#include "arch/mmu.h"
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#include "arch/x86.h"
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#include "core/spinlock.h"
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#include "core/proc.h"
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#include "core/irq.h"
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#include "core/dma.h"
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#include "core/kmem.h"
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#include "dev/acpi.h"
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#include <uacpi/kernel_api.h>
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