NAME
put_user − Write a simple value into user space.
SYNOPSIS
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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.
Returns zero on success, or −EFAULT on error.