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bitops: Move aligned_byte_mask() to wordpart.h

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The bitops.h is for bit related operations. The aligned_byte_mask()
is about byte (or part of the machine word) operations, for which
we have a separate header, move the mentioned macro to wordpart.h
to consolidate similar operations.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
This commit is contained in:
Andy Shevchenko 2024-05-07 23:01:31 +03:00 committed by Yury Norov
parent fe708f9155
commit 9f2c2d6ba1
3 changed files with 8 additions and 7 deletions
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7
include/linux/bitops.h
View file

@ -8,13 +8,6 @@
#include <uapi/linux/kernel.h>
/* 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
#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
#define BITS_TO_LONGS(nr) __KERNEL_DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
#define BITS_TO_U64(nr) __KERNEL_DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))

7
include/linux/wordpart.h
View file

@ -39,4 +39,11 @@
*/
#define REPEAT_BYTE(x) ((~0ul / 0xff) * (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

1
lib/usercopy.c
View file

@ -3,6 +3,7 @@
#include <linux/fault-inject-usercopy.h>
#include <linux/instrumented.h>
#include <linux/uaccess.h>
#include <linux/wordpart.h>
#include <linux/nospec.h>
/* out-of-line parts */