[PATCH] linux-sparc build fixes

[John Paul Adrian Glaubitz]

Hi Erik!

On Wed, Jun 14, 2017 at 01:50:06PM +0200, Erik Helin wrote:
> thanks for contributing and signing the OCA!

Thanks for reviewing my patches ;-).

> I think the first three patches (hotspot-add-missing-log-header.diff,
> hotspot-fix-checkbytebuffer.diff, rename-sparc-linux-atomic-header.diff) all
> look good, thanks for fixing broken code. Consider them Reviewed by me.
> Every patch needs a corresponding issue in the bug tracker, so I went ahead
> and created:
> - https://bugs.openjdk.java.net/browse/JDK-8182163
> - https://bugs.openjdk.java.net/browse/JDK-8182164
> - https://bugs.openjdk.java.net/browse/JDK-8182165

Great, thank you!

> For the last of those three patches, rename-space-linux-atomic-header.diff,
> did you do `hg mv` when renaming the file (in order to preserve version
> control history)?

I'm not 100% whether I did that. I'm not very familar with mercurial
as I'm more used to git. If the patch format looks wrong to you, I can
resend a revised version of this patch.

> For the fourth patch, fix-zero-build-on-sparc.diff, I'm not so sure. For
> example, the following is a bit surprising to me (mostly because I'm not
> familiar with zero):

The fourth patch may not be a 100% clean as it's more a result of
fixing compile errors until the build finished. I can definitely send
a revised, cleaner version of this patch after more extensive testing.

> When this code was written, the intent was clearly to have a specialized
> version of this function for SPARC. When writing such code, do we always
> have to take into account the zero case with !defined(ZERO)? That doesn't
> seem like the right (or a scalable) approach to me.

I agree. It's rather suboptimal.

> Severin and/or Roman, do you guys know more about Zero and how this should
> work? If I want to write a function that I want to specialize for e.g.
> x86-64 or arm, do I always have to take Zero into account? Or should some
> other define be used, like #ifdef TARGET_ARCH_sparc?

Thanks a lot for the review!

Can't wait for my first patches getting merged into OpenJDK ;-).

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913