__put_user(9)
NAME
__put_user - Write a simple value into user space, with less checking.
SYNOPSIS
__put_user(x, ptr);
ARGUMENTS
- x
- Value to copy to user space.
- ptr
- Destination address, in user space.
CONTEXT
User context only. This function may sleep.
DESCRIPTION
This macro copies a single simple value from kernel space to user
space. It supports simple types like char and int, but not larger data
types like structures or arrays.
ptr must have pointer-to-simple-variable type, and x must be assignable
to the result of dereferencing ptr.
Caller must check the pointer with access_ok before calling this
function.
Returns zero on success, or -EFAULT on error.