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 cd027298beb1..864181385579 100644 --- a/include/asm-generic/ioctl.h +++ b/include/asm-generic/ioctl.h | |||
@@ -21,8 +21,19 @@ | |||
21 | */ | 21 | */ |
22 | #define _IOC_NRBITS 8 | 22 | #define _IOC_NRBITS 8 |
23 | #define _IOC_TYPEBITS 8 | 23 | #define _IOC_TYPEBITS 8 |
24 | #define _IOC_SIZEBITS 14 | 24 | |
25 | #define _IOC_DIRBITS 2 | 25 | /* |
26 | * Let any architecture override either of the following before | ||
27 | * including this file. | ||
28 | */ | ||
29 | |||
30 | #ifndef _IOC_SIZEBITS | ||
31 | # define _IOC_SIZEBITS 14 | ||
32 | #endif | ||
33 | |||
34 | #ifndef _IOC_DIRBITS | ||
35 | # define _IOC_DIRBITS 2 | ||
36 | #endif | ||
26 | 37 | ||
27 | #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) | 38 | #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) |
28 | #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) | 39 | #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) |
@@ -35,11 +46,21 @@ | |||
35 | #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) | 46 | #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) |
36 | 47 | ||
37 | /* | 48 | /* |
38 | * Direction bits. | 49 | * Direction bits, which any architecture can choose to override |
50 | * before including this file. | ||
39 | */ | 51 | */ |
40 | #define _IOC_NONE 0U | 52 | |
41 | #define _IOC_WRITE 1U | 53 | #ifndef _IOC_NONE |
42 | #define _IOC_READ 2U | 54 | # define _IOC_NONE 0U |
55 | #endif | ||
56 | |||
57 | #ifndef _IOC_WRITE | ||
58 | # define _IOC_WRITE 1U | ||
59 | #endif | ||
60 | |||
61 | #ifndef _IOC_READ | ||
62 | # define _IOC_READ 2U | ||
63 | #endif | ||
43 | 64 | ||
44 | #define _IOC(dir,type,nr,size) \ | 65 | #define _IOC(dir,type,nr,size) \ |
45 | (((dir) << _IOC_DIRSHIFT) | \ | 66 | (((dir) << _IOC_DIRSHIFT) | \ |