Allow individual architectures to override a small set of macros before including asm-generic/ioctl.h, in order to greatly simplify a number of existing ioctl.h files.
The overrideable macros would be: _IOC_SIZEBITS _IOC_DIRBITS _IOC_NONE _IOC_WRITE _IOC_READ --- i've submitted this once before, and it didn't seem to garner a lot of attention one way or the other. this patch can be applied standalone and shouldn't affect anything, but it would subsequently allow at least a few ioctl.h files to be shortened considerably. diff --git a/include/asm-generic/ioctl.h b/include/asm-generic/ioctl.h index cd02729..4fb087a 100644 --- a/include/asm-generic/ioctl.h +++ b/include/asm-generic/ioctl.h @@ -21,8 +21,19 @@ */ #define _IOC_NRBITS 8 #define _IOC_TYPEBITS 8 -#define _IOC_SIZEBITS 14 -#define _IOC_DIRBITS 2 + +/* + * Let any architecture override either of the following before + * including this file. + */ + +#ifndef _IOC_SIZEBITS +# define _IOC_SIZEBITS 14 +#endif + +#ifndef _IOC_DIRBITS +# define _IOC_DIRBITS 2 +#endif #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) @@ -35,11 +46,21 @@ #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) /* - * Direction bits. + * Direction bits, which any architecture can choose to override + * before including this file. */ -#define _IOC_NONE 0U -#define _IOC_WRITE 1U -#define _IOC_READ 2U + +#ifndef _IOC_NONE +# define _IOC_NONE 0U +#endif + +#ifndef _IOC_WRITE +# define _IOC_WRITE 1U +#endif + +#ifndef _IOC_READ +# define _IOC_READ 2U +#endif #define _IOC(dir,type,nr,size) \ (((dir) << _IOC_DIRSHIFT) | \ -- ======================================================================== Robert P. J. Day Linux Consulting, Training and Annoying Kernel Pedantry Waterloo, Ontario, CANADA http://fsdev.net/wiki/index.php?title=Main_Page ======================================================================== - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/