/* SPDX-License-Identifier: GPL-2.0 */#ifndef __VDSO_UNALIGNED_H#define __VDSO_UNALIGNED_H #include <linux/compiler_types.h> /** * __get_unaligned_t - read an unaligned value from memory. * @type:	the type to load from the pointer. * @ptr:	the pointer to load from. * * Use memcpy to affect an unaligned type sized load avoiding undefined behavior * from approaches like type punning that require -fno-strict-aliasing in order * to be correct. As type may be const, use __unqual_scalar_typeof to map to a * non-const type - you can't memcpy into a const type. The * __get_unaligned_ctrl_type gives __unqual_scalar_typeof its required * expression rather than type, a pointer is used to avoid warnings about mixing * the use of 0 and NULL. The void* cast silences ubsan warnings. */#define __get_unaligned_t(type, ptr) ({					\	type *__get_unaligned_ctrl_type __always_unused = NULL;		\	__unqual_scalar_typeof(*__get_unaligned_ctrl_type) __get_unaligned_val; \	__builtin_memcpy(&__get_unaligned_val, (void *)(ptr),		\			 sizeof(__get_unaligned_val));			\	__get_unaligned_val;						\}) /** * __put_unaligned_t - write an unaligned value to memory. * @type:	the type of the value to store. * @val:	the value to store. * @ptr:	the pointer to store to. * * Use memcpy to affect an unaligned type sized store avoiding undefined * behavior from approaches like type punning that require -fno-strict-aliasing * in order to be correct. The void* cast silences ubsan warnings. */#define __put_unaligned_t(type, val, ptr) do {				\	type __put_unaligned_val = (val);				\	__builtin_memcpy((void *)(ptr), &__put_unaligned_val,		\			 sizeof(__put_unaligned_val));			\} while (0) #endif /* __VDSO_UNALIGNED_H */