__copy_to_user_inatomic - Copy a block of data into user space, with less checking.
2. SYNOPSIS ▲
unsigned long __copy_to_user_inatomic(void __user * to , const void * from , unsigned long n );
3. ARGUMENTS ▲
Destination address, in user space.
Source address, in kernel space.
Number of bytes to copy.
4. CONTEXT ▲
User context only.
5. DESCRIPTION ▲
Copy data from kernel space to user space. Caller must check the specified block with access_ok before calling this function. The caller should also make sure he pins the user space address so that we donAqt result in page fault and sleep.
Here we special-case 1, 2 and 4-byte copy_*_user invocations. On a fault we return the initial request size (1, 2 or 4), as copy_*_user should do. If a store crosses a page boundary and gets a fault, the x86 will not write anything, so this is accurate.
6. COPYRIGHT ▲