-/*
- * __copy_to_user: - Copy a block of data into user space, with less checking.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define __copy_to_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- might_fault(); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from, \
- __cu_len); \
- else \
- __cu_len = __invoke_copy_to_user(__cu_to, __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-#define __copy_to_user_inatomic(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from, \
- __cu_len); \
- else \
- __cu_len = __invoke_copy_to_user(__cu_to, __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-#define __copy_from_user_inatomic(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_from_kernel(__cu_to, __cu_from,\
- __cu_len);\
- else \
- __cu_len = __invoke_copy_from_user(__cu_to, __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-/*
- * copy_to_user: - Copy a block of data into user space.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define copy_to_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_to_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- if (access_ok(VERIFY_WRITE, __cu_to, __cu_len)) { \
- might_fault(); \
- __cu_len = __invoke_copy_to_user(__cu_to, \
- __cu_from, \
- __cu_len); \
- } \
- } \
- __cu_len; \
-})
-
-/*
- * __copy_from_user: - Copy a block of data from user space, with less checking.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from user space to kernel space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-#define __copy_from_user(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_from_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- might_fault(); \
- __cu_len = __invoke_copy_from_user(__cu_to, __cu_from, \
- __cu_len); \
- } \
- __cu_len; \
-})