syscall, internal/poll: accept4-to-accept fallback removal broke Go code on Synology DSM 6.2 ARM devices [1.19 backport]

[gopherbot]

@ianlancetaylor requested issue #57333 to be considered for backport to the next 1.19 minor release.

@gopherbot Please open backport issues.

We thought that we could require support for accept4 on Linux when we updated the minimum kernel version to 2.6.32, but it turns out that on 32-bit ARM accept4 was only added in kernel version 2.6.36.

[gopherbot]

Change https://go.dev/cl/457996 mentions this issue: [release-branch.go1.19] syscall, internal/poll: fall back to accept on linux-arm

[dr2chase]

I believe this should be closed, and I'm not sure why the pushed-a-commit above did not close it.