diff options
| -rw-r--r-- | include/asm-generic/ioctl.h | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/include/asm-generic/ioctl.h b/include/asm-generic/ioctl.h index cd027298beb..86418138557 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) | \ |