Current macro in linux kernel

Question

The purpose of the current macro is to find a pointer to the task structure of the currently running process.

So regarding its usage when developing a kernel module, and according to its definition does this macro return the PID of the current running user-space process or what?

Answer 1

When a user-space process performs a system call, this macro points to the task_struct associated with this process. It doesn't only contain the PID of the process but a lot of other info.