RFR: JDK-8306304: Fix xlc17 clang warnings in ppc and aix code [v2]

[Kim Barrett]

On Thu, 25 May 2023 07:16:29 GMT, JoKern65 <duke at openjdk.org> wrote:

>> That's not what I see in this PR, and not what I see in the repository after the integration.  Where are you seeing
>> that?  (If in your local repository, maybe you forgot a push to the PR?)
>
> I checked it directly in repository
> [https://github.com/openjdk/jdk/blob/master/src/hotspot/os/aix/os_aix.cpp](https://github.com/openjdk/jdk/blob/master/src/hotspot/os/aix/os_aix.cpp)
> And there I see the desired
> `struct shmid_ds shm_buf{};`

Weird! I see:
https://github.com/openjdk/jdk/blob/master/src/hotspot/os/aix/os_aix.cpp#L467
(permalink:)
`https://github.com/openjdk/jdk/blob/d87713440a1ddb830e87171b009efe9507e644cb/src/hotspot/os/aix/os_aix.cpp#L467`
https://github.com/openjdk/jdk/blob/d87713440a1ddb830e87171b009efe9507e644cb/src/hotspot/os/aix/os_aix.cpp#L467

      struct shmid_ds shm_buf = { };

(above line was cut-and-pasted)

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PR Review Comment: https://git.openjdk.org/jdk/pull/13953#discussion_r1205226537