[riscv-port-jdk11u:riscv-port] RFR: 8291893: riscv: remove fence.i used in user space [v2]

[Gui Cao]

On Thu, 28 Mar 2024 01:53:52 GMT, Fei Yang <fyang at openjdk.org> wrote:

> I think we should add one extra include here: `#include "memory/allocation.hpp"`.

Thanks for the review. Fixed

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PR Review Comment: https://git.openjdk.org/riscv-port-jdk11u/pull/16#discussion_r1542227285