MIPS: ioctl.h: Cleanup.

 o Rewrite to use <asm-generic/ioctl.h>.  Cuts down the file from 40 to
   16 lines.
 o Delete _IOC_VOID, _IOC_OUT, _IOC_IN and _IOC_INOUT.  They were added
   for 2.1.14 but I was not able to find any user - not even historical
   ones.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/include/asm/ioctl.h b/arch/mips/include/asm/ioctl.h
index 9161634..c515a1a 100644 (file)
--- a/arch/mips/include/asm/ioctl.h
+++ b/arch/mips/include/asm/ioctl.h
@@ -3,40 +3,16 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1995, 96, 99, 2001 Ralf Baechle
+ * Copyright (C) 1995, 96, 99, 2001 Ralf Baechle <ralf@linux-mips.org>
+ * Copyright (C) 2009 Wind River Systems
+ * Written by Ralf Baechle <ralf@linux-mips.org>
  */
-#ifndef _ASM_IOCTL_H
-#define _ASM_IOCTL_H
+#ifndef __ASM_IOCTL_H
+#define __ASM_IOCTL_H
 
-/*
- * The original linux ioctl numbering scheme was just a general
- * "anything goes" setup, where more or less random numbers were
- * assigned.  Sorry, I was clueless when I started out on this.
- *
- * On the alpha, we'll try to clean it up a bit, using a more sane
- * ioctl numbering, and also trying to be compatible with OSF/1 in
- * the process. I'd like to clean it up for the i386 as well, but
- * it's so painful recognizing both the new and the old numbers..
- *
- * The same applies for for the MIPS ABI; in fact even the macros
- * from Linux/Alpha fit almost perfectly.
- */
-
-#define _IOC_NRBITS    8
-#define _IOC_TYPEBITS  8
 #define _IOC_SIZEBITS  13
 #define _IOC_DIRBITS   3
 
-#define _IOC_NRMASK    ((1 << _IOC_NRBITS)-1)
-#define _IOC_TYPEMASK  ((1 << _IOC_TYPEBITS)-1)
-#define _IOC_SIZEMASK  ((1 << _IOC_SIZEBITS)-1)
-#define _IOC_DIRMASK   ((1 << _IOC_DIRBITS)-1)
-
-#define _IOC_NRSHIFT   0
-#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
-#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
-#define _IOC_DIRSHIFT  (_IOC_SIZESHIFT+_IOC_SIZEBITS)
-
 /*
  * Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit.
  * And this turns out useful to catch old ioctl numbers in header
@@ -46,53 +22,6 @@
 #define _IOC_READ      2U
 #define _IOC_WRITE     4U
 
-/*
- * The following are included for compatibility
- */
-#define _IOC_VOID      0x20000000
-#define _IOC_OUT       0x40000000
-#define _IOC_IN                0x80000000
-#define _IOC_INOUT     (IOC_IN|IOC_OUT)
-
-#define _IOC(dir, type, nr, size) \
-       (((dir)  << _IOC_DIRSHIFT) | \
-        ((type) << _IOC_TYPESHIFT) | \
-        ((nr)   << _IOC_NRSHIFT) | \
-        ((size) << _IOC_SIZESHIFT))
-
-#ifdef __KERNEL__
-/* provoke compile error for invalid uses of size argument */
-extern unsigned int __invalid_size_argument_for_IOC;
-#define _IOC_TYPECHECK(t) \
-       ((sizeof(t) == sizeof(t[1]) && \
-         sizeof(t) < (1 << _IOC_SIZEBITS)) ? \
-         sizeof(t) : __invalid_size_argument_for_IOC)
-#else
-#define _IOC_TYPECHECK(t)      (sizeof(t))
-#endif
-
-/* used to create numbers */
-#define _IO(type, nr)          _IOC(_IOC_NONE, (type), (nr), 0)
-#define _IOR(type, nr, size)   _IOC(_IOC_READ, (type), (nr), (_IOC_TYPECHECK(size)))
-#define _IOW(type, nr, size)   _IOC(_IOC_WRITE, (type), (nr), (_IOC_TYPECHECK(size)))
-#define _IOWR(type, nr, size)  _IOC(_IOC_READ|_IOC_WRITE, (type), (nr), (_IOC_TYPECHECK(size)))
-#define _IOR_BAD(type, nr, size)       _IOC(_IOC_READ, (type), (nr), sizeof(size))
-#define _IOW_BAD(type, nr, size)       _IOC(_IOC_WRITE, (type), (nr), sizeof(size))
-#define _IOWR_BAD(type, nr, size)      _IOC(_IOC_READ|_IOC_WRITE, (type), (nr), sizeof(size))
-
-
-/* used to decode them.. */
-#define _IOC_DIR(nr)           (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
-#define _IOC_TYPE(nr)          (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
-#define _IOC_NR(nr)            (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
-#define _IOC_SIZE(nr)          (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
-
-/* ...and for the drivers/sound files... */
-
-#define IOC_IN         (_IOC_WRITE << _IOC_DIRSHIFT)
-#define IOC_OUT                (_IOC_READ << _IOC_DIRSHIFT)
-#define IOC_INOUT      ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
-#define IOCSIZE_MASK   (_IOC_SIZEMASK << _IOC_SIZESHIFT)
-#define IOCSIZE_SHIFT  (_IOC_SIZESHIFT)
+#include <asm-generic/ioctl.h>
 
-#endif /* _ASM_IOCTL_H */
+#endif /* __ASM_IOCTL_H */