Re: [Qemu-devel] [PATCH 06/14] crypto: Make errp the last parameter of functions

[Fam Zheng <famz@redhat.com>]

On Mon, 04/24 09:28, Daniel P. Berrange wrote:
> On Fri, Apr 21, 2017 at 08:27:02PM +0800, Fam Zheng wrote:
> > Move opaque to 2nd instead of the 2nd to last, so that compilers help
> > check with the convertion.
> 
> Moving 'opaque' like this should not be done.
> 
> If you want the compiler to check the fixes, it should be done in
> just two stages. First move errp & move opaque to start, compile
> it & verify. Then put opaque back to where it was, and compile
> again. The resulting commit thus only has the errp move, not the
> unrelated & uneccessary opaque move.

The idea is to let everyone's compiler verifies this patch, and also to avoid
possible bugs introduced in backporting/rebasing/merging - for example if a
patch in another tree addes one more implementation that uses the old order, we
can notice.

If you don't like this, we can be careful and don't move opaque; or after a
short while, move opaque back in a separate commit (since Markus already sent a
pull request).

Fam