JDK-8266892: avoid maybe-uninitialized gcc warnings on linux s390x

[MBaesken]

In the linux s390x hs code there are a few "maybe-uninitialized" gcc warnings with gcc 8 (those warning class is disabled currently in jdk17 but enabled e.g. in jdk11). It would be good to fix them anyway which is done by this small change.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8266892: avoid maybe-uninitialized gcc warnings on linux s390x

Reviewers

• Aleksey Shipilev (@shipilev - Reviewer)
• Lutz Schmidt (@RealLucy - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/3970/head:pull/3970
$ git checkout pull/3970

Update a local copy of the PR:
$ git checkout pull/3970
$ git pull https://git.openjdk.java.net/jdk pull/3970/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3970

View PR using the GUI difftool:
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Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/3970.diff

[bridgekeeper]

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[openjdk]

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[mlbridge]

Webrevs

• 00: Full (616b9ac4)

[shipilev]

Looks fine and trivial. Consider simplifying the comment.

[shipilev]

Maybe just move the comment to the comment block above:

// Having a default clause and definite assignment makes the compiler happy.

[openjdk]

@MBaesken This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8266892: avoid maybe-uninitialized gcc warnings on linux s390x

Reviewed-by: shade, lucy

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[RealLucy]

Looks good to me.
Thanks for fixing.

[MBaesken]

/integrate

[openjdk]

@MBaesken Since your change was applied there have been 3 commits pushed to the master branch:

• 6575566: 8266787: Potential overflow of pointer arithmetic in G1ArchiveAllocator
• 8468001: 8263452: Javac slow compilation due to algorithmic complexity
• 67cb22a: 8266601: Fix bugs in AddLNode::Ideal transformations

Your commit was automatically rebased without conflicts.

Pushed as commit 9e6e222.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.