Integrated: 8273378: Shenandoah: Remove the remaining uses of os::is_MP

[Aleksey Shipilev]

On Mon, 6 Sep 2021 11:03:43 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> JDK-8188764 removed many uses of `os::is_MP`, effectively defaulting it to `true`, but some Shenandoah code still has it. This is a simple omission. All current uses on x86 already imply lock prefix, so this is a cleanup, and not a functional change.
> 
> Additional testing:
>  - [x] Linux x86_64 `hotspot_gc_shenandoah`

This pull request has now been integrated.

Changeset: fc546d6d
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/fc546d6de9a3ed33cf4b04e24e62714332b069cb
Stats:     9 lines in 1 file changed: 6 ins; 3 del; 0 mod

8273378: Shenandoah: Remove the remaining uses of os::is_MP

Reviewed-by: aph, zgu

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PR: https://git.openjdk.java.net/jdk/pull/5378