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Re: [Qemu-devel] [PATCH v2 09/22] virtio: Remove unneeded includes


From: Juan Quintela
Subject: Re: [Qemu-devel] [PATCH v2 09/22] virtio: Remove unneeded includes
Date: Fri, 10 Aug 2018 09:34:32 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

"Michael S. Tsirkin" <address@hidden> wrote:
> On Thu, Aug 09, 2018 at 08:03:03PM +0100, Dr. David Alan Gilbert wrote:
>> * Juan Quintela (address@hidden) wrote:
>> > They are all already included in virtio_pci.h.
>
> All I see in virtio_pci.h is:
>
> #include "standard-headers/linux/types.h"
>
> Weird.
>
> BTW what's the point of this patch?  Generally it's best not to depend
> on headers including each other, it makes refactoring harder.

If you see the following patches, we remove blk, net, serial, scsi,
balloon and input bits from that file, so I was removing includes patch
by patch.

And at the end, I found that we only need that ones.

"virtio-pci.h" does too many things here, I could have split it also,
because the mayority of the bits are only used now inside their own
virtio-foo-pci.c.  But then, there are things that share bits,
virtio-bus-pci is used for lots of stuff, virtio-input-pci bits are used
in virtio-input-host-pci.c, etc,   So I decided to only do the direct
split.

And about including directly all the files that you use, and including
only the files that are extrictly needed, the normal argument is that
the less includes, the faster compiler times.

Later, Juan.



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