[release-branch.go1.15] internal/poll: treat copy_file_range EPERM as not-handled
Updates #40893.
Fixes #40900.
Change-Id: I938ea4796c1e1d1e136117fe78b06ad6da8e40de
Reviewed-on: https://go-review.googlesource.com/c/go/+/249257
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Antonio Troina <thoeni@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
(cherry picked from commit
b0cc02e8c2bdba5401838d9d70a859191af9bfa5)
Reviewed-on: https://go-review.googlesource.com/c/go/+/249897
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>