mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Bart Van Assche](/assets/img/avatar_default.png)
Move the get_unaligned_be24(), get_unaligned_le24() and put_unaligned_le24() definitions from various drivers into include/linux/unaligned/generic.h. Add a put_unaligned_be24() implementation. Link: https://lore.kernel.org/r/20200313203102.16613-4-bvanassche@acm.org Cc: Keith Busch <kbusch@kernel.org> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Jens Axboe <axboe@fb.com> Cc: Harvey Harrison <harvey.harrison@gmail.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> # For drivers/usb Reviewed-by: Felipe Balbi <balbi@kernel.org> # For drivers/usb/gadget Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_UNALIGNED_GENERIC_H
|
|
#define _LINUX_UNALIGNED_GENERIC_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* Cause a link-time error if we try an unaligned access other than
|
|
* 1,2,4 or 8 bytes long
|
|
*/
|
|
extern void __bad_unaligned_access_size(void);
|
|
|
|
#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
|
|
__bad_unaligned_access_size())))); \
|
|
}))
|
|
|
|
#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
|
|
__bad_unaligned_access_size())))); \
|
|
}))
|
|
|
|
#define __put_unaligned_le(val, ptr) ({ \
|
|
void *__gu_p = (ptr); \
|
|
switch (sizeof(*(ptr))) { \
|
|
case 1: \
|
|
*(u8 *)__gu_p = (__force u8)(val); \
|
|
break; \
|
|
case 2: \
|
|
put_unaligned_le16((__force u16)(val), __gu_p); \
|
|
break; \
|
|
case 4: \
|
|
put_unaligned_le32((__force u32)(val), __gu_p); \
|
|
break; \
|
|
case 8: \
|
|
put_unaligned_le64((__force u64)(val), __gu_p); \
|
|
break; \
|
|
default: \
|
|
__bad_unaligned_access_size(); \
|
|
break; \
|
|
} \
|
|
(void)0; })
|
|
|
|
#define __put_unaligned_be(val, ptr) ({ \
|
|
void *__gu_p = (ptr); \
|
|
switch (sizeof(*(ptr))) { \
|
|
case 1: \
|
|
*(u8 *)__gu_p = (__force u8)(val); \
|
|
break; \
|
|
case 2: \
|
|
put_unaligned_be16((__force u16)(val), __gu_p); \
|
|
break; \
|
|
case 4: \
|
|
put_unaligned_be32((__force u32)(val), __gu_p); \
|
|
break; \
|
|
case 8: \
|
|
put_unaligned_be64((__force u64)(val), __gu_p); \
|
|
break; \
|
|
default: \
|
|
__bad_unaligned_access_size(); \
|
|
break; \
|
|
} \
|
|
(void)0; })
|
|
|
|
static inline u32 __get_unaligned_be24(const u8 *p)
|
|
{
|
|
return p[0] << 16 | p[1] << 8 | p[2];
|
|
}
|
|
|
|
static inline u32 get_unaligned_be24(const void *p)
|
|
{
|
|
return __get_unaligned_be24(p);
|
|
}
|
|
|
|
static inline u32 __get_unaligned_le24(const u8 *p)
|
|
{
|
|
return p[0] | p[1] << 8 | p[2] << 16;
|
|
}
|
|
|
|
static inline u32 get_unaligned_le24(const void *p)
|
|
{
|
|
return __get_unaligned_le24(p);
|
|
}
|
|
|
|
static inline void __put_unaligned_be24(const u32 val, u8 *p)
|
|
{
|
|
*p++ = val >> 16;
|
|
*p++ = val >> 8;
|
|
*p++ = val;
|
|
}
|
|
|
|
static inline void put_unaligned_be24(const u32 val, void *p)
|
|
{
|
|
__put_unaligned_be24(val, p);
|
|
}
|
|
|
|
static inline void __put_unaligned_le24(const u32 val, u8 *p)
|
|
{
|
|
*p++ = val;
|
|
*p++ = val >> 8;
|
|
*p++ = val >> 16;
|
|
}
|
|
|
|
static inline void put_unaligned_le24(const u32 val, void *p)
|
|
{
|
|
__put_unaligned_le24(val, p);
|
|
}
|
|
|
|
#endif /* _LINUX_UNALIGNED_GENERIC_H */
|