6f52b16c5b
Many user space API headers are missing licensing information, which makes it hard for compliance tools to determine the correct license. By default are files without license information under the default license of the kernel, which is GPLV2. Marking them GPLV2 would exclude them from being included in non GPLV2 code, which is obviously not intended. The user space API headers fall under the syscall exception which is in the kernels COPYING file: NOTE! This copyright does *not* cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does *not* fall under the heading of "derived work". otherwise syscall usage would not be possible. Update the files which contain no license information with an SPDX license identifier. The chosen identifier is 'GPL-2.0 WITH Linux-syscall-note' which is the officially assigned identifier for the Linux syscall exception. SPDX license identifiers are a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. See the previous patch in this series for the methodology of how this patch was researched. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _SPARC_IOCTL_H
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#define _SPARC_IOCTL_H
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/*
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* Our DIR and SIZE overlap in order to simulteneously provide
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* a non-zero _IOC_NONE (for binary compatibility) and
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* 14 bits of size as on i386. Here's the layout:
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*
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* 0xE0000000 DIR
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* 0x80000000 DIR = WRITE
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* 0x40000000 DIR = READ
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* 0x20000000 DIR = NONE
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* 0x3FFF0000 SIZE (overlaps NONE bit)
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* 0x0000FF00 TYPE
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* 0x000000FF NR (CMD)
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*/
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#define _IOC_NRBITS 8
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#define _IOC_TYPEBITS 8
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#define _IOC_SIZEBITS 13 /* Actually 14, see below. */
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#define _IOC_DIRBITS 3
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#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
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#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
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#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
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#define _IOC_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-1)
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#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
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#define _IOC_NRSHIFT 0
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#define _IOC_TYPESHIFT (_IOC_NRSHIFT + _IOC_NRBITS)
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#define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS)
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#define _IOC_DIRSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
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#define _IOC_NONE 1U
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#define _IOC_READ 2U
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#define _IOC_WRITE 4U
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#define _IOC(dir,type,nr,size) \
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(((dir) << _IOC_DIRSHIFT) | \
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((type) << _IOC_TYPESHIFT) | \
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((nr) << _IOC_NRSHIFT) | \
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((size) << _IOC_SIZESHIFT))
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#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
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#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
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#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
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#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
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/* Used to decode ioctl numbers in drivers despite the leading underscore... */
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#define _IOC_DIR(nr) \
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( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \
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(((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \
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(((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) )
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#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
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#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
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#define _IOC_SIZE(nr) \
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((((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) == 0)? \
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0: (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK))
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/* ...and for the PCMCIA and sound. */
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#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
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#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
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#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
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#define IOCSIZE_MASK (_IOC_XSIZEMASK << _IOC_SIZESHIFT)
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#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
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#endif /* !(_SPARC_IOCTL_H) */
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