[PATCH] goodbye compatmac.h

include/linux/compatmac.h

-  /* 
-   * This header tries to allow you to write 2.3-compatible drivers, 
-   * but (using this header) still allows you to run them on 2.2 and 
-   * 2.0 kernels. 
-   *
-   * Sometimes, a #define replaces a "construct" that older kernels
-   * had. For example, 
-   *
-   *       DECLARE_MUTEX(name);
-   *
-   * replaces the older 
-   *
-   *       struct semaphore name = MUTEX;
-   *
-   * This file then declares the DECLARE_MUTEX macro to compile into the 
-   * older version. 
-   * 
-   * In some cases, a macro or function changes the number of arguments.
-   * In that case, there is nothing we can do except define an access 
-   * macro that provides the same functionality on both versions of Linux. 
-   * 
-   * This is the case for example with the "get_user" macro 2.0 kernels use:
-   *
-   *          a = get_user (b);
-   *  
-   * while newer kernels use 
-   * 
-   *          get_user (a,b);
-   *
-   * This is unfortunate. We therefore define "Get_user (a,b)" which looks
-   * almost the same as the 2.2+ construct, and translates into the 
-   * appropriate sequence for earlier constructs. 
-   * 
-   * Supported by this file are the 2.0 kernels, 2.2 kernels, and the 
-   * most recent 2.3 kernel. 2.3 support will be dropped as soon when 2.4
-   * comes out. 2.0 support may someday be dropped. But then again, maybe 
-   * not. 
-   *
-   * I'll try to maintain this, provided that Linus agrees with the setup. 
-   * Feel free to mail updates or suggestions. 
-   *
-   * -- R.E.Wolff@BitWizard.nl
-   *
-   */
-
-#ifndef COMPATMAC_H
-#define COMPATMAC_H
-
-#include <linux/version.h>
-
-#if LINUX_VERSION_CODE < 0x020100    /* Less than 2.1.0 */
-#define TWO_ZERO
-#else
-#if LINUX_VERSION_CODE < 0x020200   /* less than 2.2.x */
-#warning "Please use a 2.2.x kernel. "
-#else
-#if LINUX_VERSION_CODE < 0x020300   /* less than 2.3.x */
-#define TWO_TWO
-#else
-#define TWO_THREE
-#endif
-#endif
-#endif
-
-#ifdef TWO_ZERO
-
-/* Here is the section that makes the 2.2 compatible driver source 
-   work for 2.0 too! We mostly try to adopt the "new thingies" from 2.2, 
-   and provide for compatibility stuff here if possible. */
-
-/* Some 200 days (on intel) */
-#define MAX_SCHEDULE_TIMEOUT     ((long)(~0UL>>1))
-
-#include <linux/bios32.h>
-
-#define Get_user(a,b)                a = get_user(b)
-#define Put_user(a,b)                0,put_user(a,b)
-#define copy_to_user(a,b,c)          memcpy_tofs(a,b,c)
-
-static inline int copy_from_user(void *to,const void *from, int c) 
-{
-  memcpy_fromfs(to, from, c);
-  return 0;
-}
-
-#define pci_present                  pcibios_present
-#define pci_read_config_word         pcibios_read_config_word
-#define pci_read_config_dword        pcibios_read_config_dword
-
-static inline unsigned char get_irq (unsigned char bus, unsigned char fn)
-{
-	unsigned char t; 
-	pcibios_read_config_byte (bus, fn, PCI_INTERRUPT_LINE, &t);
-	return t;
-}
-
-static inline void *ioremap(unsigned long base, long length)
-{
-	if (base < 0x100000) return (void *)base;
-	return vremap (base, length);
-}
-
-#define my_iounmap(x, b)             (((long)x<0x100000)?0:vfree ((void*)x))
-
-#define tty_flip_buffer_push(tty)    schedule_delayed_work(&tty->flip.work, 1)
-#define signal_pending(current)      (current->signal & ~current->blocked)
-#define schedule_timeout(to)         do {current->timeout = jiffies + (to);schedule ();} while (0)
-#define time_after(t1,t2)            (((long)t1-t2) > 0)
-
-
-#define test_and_set_bit(nr, addr)   set_bit(nr, addr)
-#define test_and_clear_bit(nr, addr) clear_bit(nr, addr)
-
-/* Not yet implemented on 2.0 */
-#define ASYNC_SPD_SHI  -1
-#define ASYNC_SPD_WARP -1
-
-
-/* Ugly hack: the driver_name doesn't exist in 2.0.x . So we define it
-   to the "name" field that does exist. As long as the assignments are
-   done in the right order, there is nothing to worry about. */
-#define driver_name           name 
-
-/* Should be in a header somewhere. They are in tty.h on 2.2 */
-#define TTY_HW_COOK_OUT       14 /* Flag to tell ntty what we can handle */
-#define TTY_HW_COOK_IN        15 /* in hardware - output and input       */
-
-/* The return type of a "close" routine. */
-#define INT                   void
-#define NO_ERROR              /* Nothing */
-
-#else
-
-/* The 2.2.x compatibility section. */
-#include <asm/uaccess.h>
-
-
-#define Get_user(a,b)         get_user(a,b)
-#define Put_user(a,b)         put_user(a,b)
-#define get_irq(pdev)         pdev->irq
-
-#define INT                   int
-#define NO_ERROR              0
-
-#define my_iounmap(x,b)       (iounmap((char *)(b)))
-
-#endif
-
-#ifndef TWO_THREE
-/* These are new in 2.3. The source now uses 2.3 syntax, and here is 
-   the compatibility define... */
-#define wait_queue_head_t     struct wait_queue *
-#define DECLARE_MUTEX(name)   struct semaphore name = MUTEX
-#define DECLARE_WAITQUEUE(wait, current) \
-                              struct wait_queue wait = { current, NULL }
-
-#endif
-
-
-#endif