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    Subject[patch 14/18] m68k: remove the dead PCI code
    From: Adrian Bunk <bunk@kernel.org>

    This patch removes the no longer used m68k PCI code.

    Signed-off-by: Adrian Bunk <bunk@kernel.org>
    Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
    ---
    arch/m68k/Kconfig | 4
    arch/m68k/kernel/Makefile | 1
    arch/m68k/kernel/bios32.c | 516 ----------------------------------------------
    include/asm-m68k/dma.h | 4
    include/asm-m68k/io.h | 66 -----
    include/asm-m68k/pci.h | 46 ----
    6 files changed, 7 insertions(+), 630 deletions(-)


    --- a/arch/m68k/Kconfig
    +++ b/arch/m68k/Kconfig
    @@ -122,10 +122,6 @@ config ATARI
    this kernel on an Atari, say Y here and browse the material
    available in <file:Documentation/m68k>; otherwise say N.

    -config PCI
    - bool
    - help
    -
    config MAC
    bool "Macintosh support"
    select MMU_MOTOROLA if MMU
    --- a/arch/m68k/kernel/Makefile
    +++ b/arch/m68k/kernel/Makefile
    @@ -14,5 +14,4 @@ obj-y := entry.o process.o traps.o ints.

    devres-y = ../../../kernel/irq/devres.o

    -obj-$(CONFIG_PCI) += bios32.o
    obj-y$(CONFIG_MMU_SUN3) += dma.o # no, it's not a typo
    --- a/arch/m68k/kernel/bios32.c
    +++ /dev/null
    @@ -1,516 +0,0 @@
    -/*
    - * bios32.c - PCI BIOS functions for m68k systems.
    - *
    - * Written by Wout Klaren.
    - *
    - * Based on the DEC Alpha bios32.c by Dave Rusling and David Mosberger.
    - */
    -
    -#include <linux/init.h>
    -#include <linux/kernel.h>
    -
    -#if 0
    -# define DBG_DEVS(args) printk args
    -#else
    -# define DBG_DEVS(args)
    -#endif
    -
    -#ifdef CONFIG_PCI
    -
    -/*
    - * PCI support for Linux/m68k. Currently only the Hades is supported.
    - *
    - * The support for PCI bridges in the DEC Alpha version has
    - * been removed in this version.
    - */
    -
    -#include <linux/pci.h>
    -#include <linux/slab.h>
    -#include <linux/mm.h>
    -
    -#include <asm/io.h>
    -#include <asm/pci.h>
    -#include <asm/uaccess.h>
    -
    -#define KB 1024
    -#define MB (1024*KB)
    -#define GB (1024*MB)
    -
    -#define MAJOR_REV 0
    -#define MINOR_REV 5
    -
    -/*
    - * Align VAL to ALIGN, which must be a power of two.
    - */
    -
    -#define ALIGN(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
    -
    -/*
    - * Offsets relative to the I/O and memory base addresses from where resources
    - * are allocated.
    - */
    -
    -#define IO_ALLOC_OFFSET 0x00004000
    -#define MEM_ALLOC_OFFSET 0x04000000
    -
    -/*
    - * Declarations of hardware specific initialisation functions.
    - */
    -
    -extern struct pci_bus_info *init_hades_pci(void);
    -
    -/*
    - * Bus info structure of the PCI bus. A pointer to this structure is
    - * put in the sysdata member of the pci_bus structure.
    - */
    -
    -static struct pci_bus_info *bus_info;
    -
    -static int pci_modify = 1; /* If set, layout the PCI bus ourself. */
    -static int skip_vga; /* If set do not modify base addresses
    - of vga cards.*/
    -static int disable_pci_burst; /* If set do not allow PCI bursts. */
    -
    -static unsigned int io_base;
    -static unsigned int mem_base;
    -
    -/*
    - * static void disable_dev(struct pci_dev *dev)
    - *
    - * Disable PCI device DEV so that it does not respond to I/O or memory
    - * accesses.
    - *
    - * Parameters:
    - *
    - * dev - device to disable.
    - */
    -
    -static void __init disable_dev(struct pci_dev *dev)
    -{
    - unsigned short cmd;
    -
    - if (((dev->class >> 8 == PCI_CLASS_NOT_DEFINED_VGA) ||
    - (dev->class >> 8 == PCI_CLASS_DISPLAY_VGA) ||
    - (dev->class >> 8 == PCI_CLASS_DISPLAY_XGA)) && skip_vga)
    - return;
    -
    - pci_read_config_word(dev, PCI_COMMAND, &cmd);
    -
    - cmd &= (~PCI_COMMAND_IO & ~PCI_COMMAND_MEMORY & ~PCI_COMMAND_MASTER);
    - pci_write_config_word(dev, PCI_COMMAND, cmd);
    -}
    -
    -/*
    - * static void layout_dev(struct pci_dev *dev)
    - *
    - * Layout memory and I/O for a device.
    - *
    - * Parameters:
    - *
    - * device - device to layout memory and I/O for.
    - */
    -
    -static void __init layout_dev(struct pci_dev *dev)
    -{
    - unsigned short cmd;
    - unsigned int base, mask, size, reg;
    - unsigned int alignto;
    - int i;
    -
    - /*
    - * Skip video cards if requested.
    - */
    -
    - if (((dev->class >> 8 == PCI_CLASS_NOT_DEFINED_VGA) ||
    - (dev->class >> 8 == PCI_CLASS_DISPLAY_VGA) ||
    - (dev->class >> 8 == PCI_CLASS_DISPLAY_XGA)) && skip_vga)
    - return;
    -
    - pci_read_config_word(dev, PCI_COMMAND, &cmd);
    -
    - for (reg = PCI_BASE_ADDRESS_0, i = 0; reg <= PCI_BASE_ADDRESS_5; reg += 4, i++)
    - {
    - /*
    - * Figure out how much space and of what type this
    - * device wants.
    - */
    -
    - pci_write_config_dword(dev, reg, 0xffffffff);
    - pci_read_config_dword(dev, reg, &base);
    -
    - if (!base)
    - {
    - /* this base-address register is unused */
    - dev->resource[i].start = 0;
    - dev->resource[i].end = 0;
    - dev->resource[i].flags = 0;
    - continue;
    - }
    -
    - /*
    - * We've read the base address register back after
    - * writing all ones and so now we must decode it.
    - */
    -
    - if (base & PCI_BASE_ADDRESS_SPACE_IO)
    - {
    - /*
    - * I/O space base address register.
    - */
    -
    - cmd |= PCI_COMMAND_IO;
    -
    - base &= PCI_BASE_ADDRESS_IO_MASK;
    - mask = (~base << 1) | 0x1;
    - size = (mask & base) & 0xffffffff;
    -
    - /*
    - * Align to multiple of size of minimum base.
    - */
    -
    - alignto = max_t(unsigned int, 0x040, size);
    - base = ALIGN(io_base, alignto);
    - io_base = base + size;
    - pci_write_config_dword(dev, reg, base | PCI_BASE_ADDRESS_SPACE_IO);
    -
    - dev->resource[i].start = base;
    - dev->resource[i].end = dev->resource[i].start + size - 1;
    - dev->resource[i].flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
    -
    - DBG_DEVS(("layout_dev: IO address: %lX\n", base));
    - }
    - else
    - {
    - unsigned int type;
    -
    - /*
    - * Memory space base address register.
    - */
    -
    - cmd |= PCI_COMMAND_MEMORY;
    - type = base & PCI_BASE_ADDRESS_MEM_TYPE_MASK;
    - base &= PCI_BASE_ADDRESS_MEM_MASK;
    - mask = (~base << 1) | 0x1;
    - size = (mask & base) & 0xffffffff;
    - switch (type)
    - {
    - case PCI_BASE_ADDRESS_MEM_TYPE_32:
    - case PCI_BASE_ADDRESS_MEM_TYPE_64:
    - break;
    -
    - case PCI_BASE_ADDRESS_MEM_TYPE_1M:
    - printk("bios32 WARNING: slot %d, function %d "
    - "requests memory below 1MB---don't "
    - "know how to do that.\n",
    - PCI_SLOT(dev->devfn),
    - PCI_FUNC(dev->devfn));
    - continue;
    - }
    -
    - /*
    - * Align to multiple of size of minimum base.
    - */
    -
    - alignto = max_t(unsigned int, 0x1000, size);
    - base = ALIGN(mem_base, alignto);
    - mem_base = base + size;
    - pci_write_config_dword(dev, reg, base);
    -
    - dev->resource[i].start = base;
    - dev->resource[i].end = dev->resource[i].start + size - 1;
    - dev->resource[i].flags = IORESOURCE_MEM;
    -
    - if (type == PCI_BASE_ADDRESS_MEM_TYPE_64)
    - {
    - /*
    - * 64-bit address, set the highest 32 bits
    - * to zero.
    - */
    -
    - reg += 4;
    - pci_write_config_dword(dev, reg, 0);
    -
    - i++;
    - dev->resource[i].start = 0;
    - dev->resource[i].end = 0;
    - dev->resource[i].flags = 0;
    - }
    - }
    - }
    -
    - /*
    - * Enable device:
    - */
    -
    - if (dev->class >> 8 == PCI_CLASS_NOT_DEFINED ||
    - dev->class >> 8 == PCI_CLASS_NOT_DEFINED_VGA ||
    - dev->class >> 8 == PCI_CLASS_DISPLAY_VGA ||
    - dev->class >> 8 == PCI_CLASS_DISPLAY_XGA)
    - {
    - /*
    - * All of these (may) have I/O scattered all around
    - * and may not use i/o-base address registers at all.
    - * So we just have to always enable I/O to these
    - * devices.
    - */
    - cmd |= PCI_COMMAND_IO;
    - }
    -
    - pci_write_config_word(dev, PCI_COMMAND, cmd | PCI_COMMAND_MASTER);
    -
    - pci_write_config_byte(dev, PCI_LATENCY_TIMER, (disable_pci_burst) ? 0 : 32);
    -
    - if (bus_info != NULL)
    - bus_info->conf_device(dev); /* Machine dependent configuration. */
    -
    - DBG_DEVS(("layout_dev: bus %d slot 0x%x VID 0x%x DID 0x%x class 0x%x\n",
    - dev->bus->number, PCI_SLOT(dev->devfn), dev->vendor, dev->device, dev->class));
    -}
    -
    -/*
    - * static void layout_bus(struct pci_bus *bus)
    - *
    - * Layout memory and I/O for all devices on the given bus.
    - *
    - * Parameters:
    - *
    - * bus - bus.
    - */
    -
    -static void __init layout_bus(struct pci_bus *bus)
    -{
    - unsigned int bio, bmem;
    - struct pci_dev *dev;
    -
    - DBG_DEVS(("layout_bus: starting bus %d\n", bus->number));
    -
    - if (!bus->devices && !bus->children)
    - return;
    -
    - /*
    - * Align the current bases on appropriate boundaries (4K for
    - * IO and 1MB for memory).
    - */
    -
    - bio = io_base = ALIGN(io_base, 4*KB);
    - bmem = mem_base = ALIGN(mem_base, 1*MB);
    -
    - /*
    - * PCI devices might have been setup by a PCI BIOS emulation
    - * running under TOS. In these cases there is a
    - * window during which two devices may have an overlapping
    - * address range. To avoid this causing trouble, we first
    - * turn off the I/O and memory address decoders for all PCI
    - * devices. They'll be re-enabled only once all address
    - * decoders are programmed consistently.
    - */
    -
    - DBG_DEVS(("layout_bus: disable_dev for bus %d\n", bus->number));
    -
    - for (dev = bus->devices; dev; dev = dev->sibling)
    - {
    - if ((dev->class >> 16 != PCI_BASE_CLASS_BRIDGE) ||
    - (dev->class >> 8 == PCI_CLASS_BRIDGE_PCMCIA))
    - disable_dev(dev);
    - }
    -
    - /*
    - * Allocate space to each device:
    - */
    -
    - DBG_DEVS(("layout_bus: starting bus %d devices\n", bus->number));
    -
    - for (dev = bus->devices; dev; dev = dev->sibling)
    - {
    - if ((dev->class >> 16 != PCI_BASE_CLASS_BRIDGE) ||
    - (dev->class >> 8 == PCI_CLASS_BRIDGE_PCMCIA))
    - layout_dev(dev);
    - }
    -
    - DBG_DEVS(("layout_bus: bus %d finished\n", bus->number));
    -}
    -
    -/*
    - * static void pcibios_fixup(void)
    - *
    - * Layout memory and I/O of all devices on the PCI bus if 'pci_modify' is
    - * true. This might be necessary because not every m68k machine with a PCI
    - * bus has a PCI BIOS. This function should be called right after
    - * pci_scan_bus() in pcibios_init().
    - */
    -
    -static void __init pcibios_fixup(void)
    -{
    - if (pci_modify)
    - {
    - /*
    - * Set base addresses for allocation of I/O and memory space.
    - */
    -
    - io_base = bus_info->io_space.start + IO_ALLOC_OFFSET;
    - mem_base = bus_info->mem_space.start + MEM_ALLOC_OFFSET;
    -
    - /*
    - * Scan the tree, allocating PCI memory and I/O space.
    - */
    -
    - layout_bus(pci_bus_b(pci_root.next));
    - }
    -
    - /*
    - * Fix interrupt assignments, etc.
    - */
    -
    - bus_info->fixup(pci_modify);
    -}
    -
    -/*
    - * static void pcibios_claim_resources(struct pci_bus *bus)
    - *
    - * Claim all resources that are assigned to devices on the given bus.
    - *
    - * Parameters:
    - *
    - * bus - bus.
    - */
    -
    -static void __init pcibios_claim_resources(struct pci_bus *bus)
    -{
    - struct pci_dev *dev;
    - int i;
    -
    - while (bus)
    - {
    - for (dev = bus->devices; (dev != NULL); dev = dev->sibling)
    - {
    - for (i = 0; i < PCI_NUM_RESOURCES; i++)
    - {
    - struct resource *r = &dev->resource[i];
    - struct resource *pr;
    - struct pci_bus_info *bus_info = (struct pci_bus_info *) dev->sysdata;
    -
    - if ((r->start == 0) || (r->parent != NULL))
    - continue;
    -#if 1
    - if (r->flags & IORESOURCE_IO)
    - pr = &bus_info->io_space;
    - else
    - pr = &bus_info->mem_space;
    -#else
    - if (r->flags & IORESOURCE_IO)
    - pr = &ioport_resource;
    - else
    - pr = &iomem_resource;
    -#endif
    - if (request_resource(pr, r) < 0)
    - {
    - printk(KERN_ERR "PCI: Address space collision on region %d of device %s\n", i, dev->name);
    - }
    - }
    - }
    -
    - if (bus->children)
    - pcibios_claim_resources(bus->children);
    -
    - bus = bus->next;
    - }
    -}
    -
    -/*
    - * int pcibios_assign_resource(struct pci_dev *dev, int i)
    - *
    - * Assign a new address to a PCI resource.
    - *
    - * Parameters:
    - *
    - * dev - device.
    - * i - resource.
    - *
    - * Result: 0 if successful.
    - */
    -
    -int __init pcibios_assign_resource(struct pci_dev *dev, int i)
    -{
    - struct resource *r = &dev->resource[i];
    - struct resource *pr = pci_find_parent_resource(dev, r);
    - unsigned long size = r->end + 1;
    -
    - if (!pr)
    - return -EINVAL;
    -
    - if (r->flags & IORESOURCE_IO)
    - {
    - if (size > 0x100)
    - return -EFBIG;
    -
    - if (allocate_resource(pr, r, size, bus_info->io_space.start +
    - IO_ALLOC_OFFSET, bus_info->io_space.end, 1024))
    - return -EBUSY;
    - }
    - else
    - {
    - if (allocate_resource(pr, r, size, bus_info->mem_space.start +
    - MEM_ALLOC_OFFSET, bus_info->mem_space.end, size))
    - return -EBUSY;
    - }
    -
    - if (i < 6)
    - pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, r->start);
    -
    - return 0;
    -}
    -
    -void __init pcibios_fixup_bus(struct pci_bus *bus)
    -{
    - struct pci_dev *dev;
    - void *sysdata;
    -
    - sysdata = (bus->parent) ? bus->parent->sysdata : bus->sysdata;
    -
    - for (dev = bus->devices; (dev != NULL); dev = dev->sibling)
    - dev->sysdata = sysdata;
    -}
    -
    -void __init pcibios_init(void)
    -{
    - printk("Linux/m68k PCI BIOS32 revision %x.%02x\n", MAJOR_REV, MINOR_REV);
    -
    - bus_info = NULL;
    -
    -/* Hades code was:
    - if (MACH_IS_HADES)
    - bus_info = init_hades_pci();
    -*/
    -
    - if (bus_info != NULL)
    - {
    - printk("PCI: Probing PCI hardware\n");
    - pci_scan_bus(0, bus_info->m68k_pci_ops, bus_info);
    - pcibios_fixup();
    - pcibios_claim_resources(pci_root);
    - }
    - else
    - printk("PCI: No PCI bus detected\n");
    -}
    -
    -char * __init pcibios_setup(char *str)
    -{
    - if (!strcmp(str, "nomodify"))
    - {
    - pci_modify = 0;
    - return NULL;
    - }
    - else if (!strcmp(str, "skipvga"))
    - {
    - skip_vga = 1;
    - return NULL;
    - }
    - else if (!strcmp(str, "noburst"))
    - {
    - disable_pci_burst = 1;
    - return NULL;
    - }
    -
    - return str;
    -}
    -#endif /* CONFIG_PCI */
    --- a/include/asm-m68k/dma.h
    +++ b/include/asm-m68k/dma.h
    @@ -11,10 +11,6 @@
    extern int request_dma(unsigned int dmanr, const char * device_id); /* reserve a DMA channel */
    extern void free_dma(unsigned int dmanr); /* release it again */

    -#ifdef CONFIG_PCI
    -extern int isa_dma_bridge_buggy;
    -#else
    #define isa_dma_bridge_buggy (0)
    -#endif

    #endif /* _M68K_DMA_H */
    --- a/include/asm-m68k/io.h
    +++ b/include/asm-m68k/io.h
    @@ -7,15 +7,12 @@
    * - added skeleton for GG-II and Amiga PCMCIA
    * 2/3/01 RZ: - moved a few more defs into raw_io.h
    *
    - * inX/outX/readX/writeX should not be used by any driver unless it does
    - * ISA or PCI access. Other drivers should use function defined in raw_io.h
    + * inX/outX should not be used by any driver unless it does
    + * ISA access. Other drivers should use function defined in raw_io.h
    * or define its own macros on top of these.
    *
    - * inX(),outX() are for PCI and ISA I/O
    - * readX(),writeX() are for PCI memory
    + * inX(),outX() are for ISA I/O
    * isa_readX(),isa_writeX() are for ISA memory
    - *
    - * moved mem{cpy,set}_*io inside CONFIG_PCI
    */

    #ifndef _IO_H
    @@ -256,10 +253,7 @@ static inline void isa_delay(void)
    (ISA_SEX ? raw_outsl(isa_itl(port), (u32 *)(buf), (nr)) : \
    raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))

    -#endif /* CONFIG_ISA */
    -

    -#if defined(CONFIG_ISA) && !defined(CONFIG_PCI)
    #define inb isa_inb
    #define inb_p isa_inb_p
    #define outb isa_outb
    @@ -282,55 +276,9 @@ static inline void isa_delay(void)
    #define readw isa_readw
    #define writeb isa_writeb
    #define writew isa_writew
    -#endif /* CONFIG_ISA */

    -#if defined(CONFIG_PCI)
    +#else /* CONFIG_ISA */

    -#define readl(addr) in_le32(addr)
    -#define writel(val,addr) out_le32((addr),(val))
    -
    -/* those can be defined for both ISA and PCI - it won't work though */
    -#define readb(addr) in_8(addr)
    -#define readw(addr) in_le16(addr)
    -#define writeb(val,addr) out_8((addr),(val))
    -#define writew(val,addr) out_le16((addr),(val))
    -
    -#define readb_relaxed(addr) readb(addr)
    -#define readw_relaxed(addr) readw(addr)
    -#define readl_relaxed(addr) readl(addr)
    -
    -#ifndef CONFIG_ISA
    -#define inb(port) in_8(port)
    -#define outb(val,port) out_8((port),(val))
    -#define inw(port) in_le16(port)
    -#define outw(val,port) out_le16((port),(val))
    -#define inl(port) in_le32(port)
    -#define outl(val,port) out_le32((port),(val))
    -
    -#else
    -/*
    - * kernel with both ISA and PCI compiled in, those have
    - * conflicting defs for in/out. Simply consider port < 1024
    - * ISA and everything else PCI. read,write not defined
    - * in this case
    - */
    -#define inb(port) ((port)<1024 ? isa_inb(port) : in_8(port))
    -#define inb_p(port) ((port)<1024 ? isa_inb_p(port) : in_8(port))
    -#define inw(port) ((port)<1024 ? isa_inw(port) : in_le16(port))
    -#define inw_p(port) ((port)<1024 ? isa_inw_p(port) : in_le16(port))
    -#define inl(port) ((port)<1024 ? isa_inl(port) : in_le32(port))
    -#define inl_p(port) ((port)<1024 ? isa_inl_p(port) : in_le32(port))
    -
    -#define outb(val,port) ((port)<1024 ? isa_outb((val),(port)) : out_8((port),(val)))
    -#define outb_p(val,port) ((port)<1024 ? isa_outb_p((val),(port)) : out_8((port),(val)))
    -#define outw(val,port) ((port)<1024 ? isa_outw((val),(port)) : out_le16((port),(val)))
    -#define outw_p(val,port) ((port)<1024 ? isa_outw_p((val),(port)) : out_le16((port),(val)))
    -#define outl(val,port) ((port)<1024 ? isa_outl((val),(port)) : out_le32((port),(val)))
    -#define outl_p(val,port) ((port)<1024 ? isa_outl_p((val),(port)) : out_le32((port),(val)))
    -#endif
    -#endif /* CONFIG_PCI */
    -
    -#if !defined(CONFIG_ISA) && !defined(CONFIG_PCI)
    /*
    * We need to define dummy functions for GENERIC_IOMAP support.
    */
    @@ -357,11 +305,11 @@ static inline void isa_delay(void)
    #define writeb(val,addr) out_8((addr),(val))
    #define readw(addr) in_le16(addr)
    #define writew(val,addr) out_le16((addr),(val))
    -#endif
    -#if !defined(CONFIG_PCI)
    +
    +#endif /* CONFIG_ISA */
    +
    #define readl(addr) in_le32(addr)
    #define writel(val,addr) out_le32((addr),(val))
    -#endif

    #define mmiowb()

    --- a/include/asm-m68k/pci.h
    +++ b/include/asm-m68k/pci.h
    @@ -1,54 +1,8 @@
    #ifndef _ASM_M68K_PCI_H
    #define _ASM_M68K_PCI_H

    -/*
    - * asm-m68k/pci_m68k.h - m68k specific PCI declarations.
    - *
    - * Written by Wout Klaren.
    - */
    -
    -#include <asm/scatterlist.h>
    #include <asm-generic/pci-dma-compat.h>

    -struct pci_ops;
    -
    -/*
    - * Structure with hardware dependent information and functions of the
    - * PCI bus.
    - */
    -
    -struct pci_bus_info
    -{
    - /*
    - * Resources of the PCI bus.
    - */
    -
    - struct resource mem_space;
    - struct resource io_space;
    -
    - /*
    - * System dependent functions.
    - */
    -
    - struct pci_ops *m68k_pci_ops;
    -
    - void (*fixup)(int pci_modify);
    - void (*conf_device)(struct pci_dev *dev);
    -};
    -
    -#define pcibios_assign_all_busses() 0
    -#define pcibios_scan_all_fns(a, b) 0
    -
    -static inline void pcibios_set_master(struct pci_dev *dev)
    -{
    - /* No special bus mastering setup handling */
    -}
    -
    -static inline void pcibios_penalize_isa_irq(int irq, int active)
    -{
    - /* We don't do dynamic PCI IRQ allocation */
    -}
    -
    /* The PCI address space does equal the physical memory
    * address space. The networking and block device layers use
    * this boolean for bounce buffer decisions.
    --
    Gr{oetje,eeting}s,
    Geert

    --
    Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

    In personal conversations with technical people, I call myself a hacker. But
    when I'm talking to journalists I just say "programmer" or something like that.
    -- Linus Torvalds



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