a7afff31d5
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>
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_UNALIGNED_GENERIC_H
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#define _LINUX_UNALIGNED_GENERIC_H
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#include <linux/types.h>
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/*
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* Cause a link-time error if we try an unaligned access other than
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* 1,2,4 or 8 bytes long
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*/
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extern void __bad_unaligned_access_size(void);
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#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
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__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
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__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
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__bad_unaligned_access_size())))); \
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}))
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#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
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__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
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__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
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__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
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__bad_unaligned_access_size())))); \
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}))
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#define __put_unaligned_le(val, ptr) ({ \
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void *__gu_p = (ptr); \
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switch (sizeof(*(ptr))) { \
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case 1: \
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*(u8 *)__gu_p = (__force u8)(val); \
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break; \
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case 2: \
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put_unaligned_le16((__force u16)(val), __gu_p); \
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break; \
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case 4: \
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put_unaligned_le32((__force u32)(val), __gu_p); \
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break; \
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case 8: \
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put_unaligned_le64((__force u64)(val), __gu_p); \
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break; \
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default: \
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__bad_unaligned_access_size(); \
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break; \
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} \
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(void)0; })
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#define __put_unaligned_be(val, ptr) ({ \
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void *__gu_p = (ptr); \
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switch (sizeof(*(ptr))) { \
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case 1: \
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*(u8 *)__gu_p = (__force u8)(val); \
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break; \
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case 2: \
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put_unaligned_be16((__force u16)(val), __gu_p); \
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break; \
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case 4: \
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put_unaligned_be32((__force u32)(val), __gu_p); \
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break; \
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case 8: \
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put_unaligned_be64((__force u64)(val), __gu_p); \
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break; \
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default: \
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__bad_unaligned_access_size(); \
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break; \
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} \
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(void)0; })
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static inline u32 __get_unaligned_be24(const u8 *p)
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{
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return p[0] << 16 | p[1] << 8 | p[2];
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}
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static inline u32 get_unaligned_be24(const void *p)
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{
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return __get_unaligned_be24(p);
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}
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static inline u32 __get_unaligned_le24(const u8 *p)
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{
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return p[0] | p[1] << 8 | p[2] << 16;
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}
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static inline u32 get_unaligned_le24(const void *p)
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{
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return __get_unaligned_le24(p);
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}
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static inline void __put_unaligned_be24(const u32 val, u8 *p)
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{
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*p++ = val >> 16;
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*p++ = val >> 8;
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*p++ = val;
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}
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static inline void put_unaligned_be24(const u32 val, void *p)
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{
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__put_unaligned_be24(val, p);
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}
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static inline void __put_unaligned_le24(const u32 val, u8 *p)
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{
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*p++ = val;
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*p++ = val >> 8;
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*p++ = val >> 16;
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}
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static inline void put_unaligned_le24(const u32 val, void *p)
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{
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__put_unaligned_le24(val, p);
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}
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#endif /* _LINUX_UNALIGNED_GENERIC_H */
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