8374056: RISC-V: Fix argument passing for the RiscvFlushIcache::flush

[RealFYang]

Hi all,

This pull request contains a backport of commit dc80ce7a from the openjdk/jdk repository.

The commit being backported was authored by ikarostsin on 9 Feb 2026 and was reviewed by Fei Yang and Robbin Ehn.

Thanks!

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8374056 needs maintainer approval

Issue

• JDK-8374056: RISC-V: Fix argument passing for the RiscvFlushIcache::flush (Bug - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/245/head:pull/245
$ git checkout pull/245

Update a local copy of the PR:
$ git checkout pull/245
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/245/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 245

View PR using the GUI difftool:
$ git pr show -t 245

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/245.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back fyang! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @RealFYang This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[RealFYang]

/approval request
Same issue is there in jdk25u-dev repo. This doesn't affect functionality for now.
But this needs to be fixed to avoid possible confusion and for future kernel versions
which might make use of the second parameter of the sys_flush_icache system call.
This is RISC-V specific change. Verified with hotspot:tier1 (fastdebug) on linux-riscv64.

[openjdk]

@RealFYang
8374056: The approval request has been created successfully.

[mlbridge]

Webrevs

• 00: Full (7b464d8f)

[GoeLin]

HI @RealFYang
Don't you want to backport to 26 first?

[RealFYang]

HI @RealFYang Don't you want to backport to 26 first?

Yeah, I have just created one for 26 here: openjdk/jdk26u#48