On Fri, Jan 03, 2020 at 08:29:26AM -0800, Sargun Dhillon wrote:

This introduces a function which can be used to fetch a file, given an
arbitrary task. As long as the user holds a reference (refcnt) to the
task_struct it is safe to call, and will either return NULL on failure,
or a pointer to the file, with a refcnt.

This patch is based on Oleg Nesterov's (cf. [1]) patch from September
2018.

[1]: Link: https://lore.kernel.org/r/20180915160423.GA31461@redhat.com (local)

Signed-off-by: Sargun Dhillon <redacted>
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Christian Brauner <redacted>

Nit: the patch is titled "vfs, fdtable: Add get_task_file helper"
but the actual helper is called fget_task()