diff options
Diffstat (limited to 'include/linux/wordpart.h')
| -rw-r--r-- | include/linux/wordpart.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/wordpart.h b/include/linux/wordpart.h index f6f8f83b15b0..5a7b97bb7c95 100644 --- a/include/linux/wordpart.h +++ b/include/linux/wordpart.h @@ -39,4 +39,19 @@ */ #define REPEAT_BYTE(x) ((~0ul / 0xff) * (x)) +/** + * REPEAT_BYTE_U32 - repeat the value @x multiple times as a u32 value + * @x: value to repeat + * + * NOTE: @x is not checked for > 0xff; larger values produce odd results. + */ +#define REPEAT_BYTE_U32(x) lower_32_bits(REPEAT_BYTE(x)) + +/* Set bits in the first 'n' bytes when loaded from memory */ +#ifdef __LITTLE_ENDIAN +# define aligned_byte_mask(n) ((1UL << 8*(n))-1) +#else +# define aligned_byte_mask(n) (~0xffUL << (BITS_PER_LONG - 8 - 8*(n))) +#endif + #endif // _LINUX_WORDPART_H |