Re: [PATCH 3/4] util/iov: Remove qemu_iovec_init_extended()

[Eric Blake <eblake@redhat.com>]

On Fri, Mar 17, 2023 at 06:50:18PM +0100, Hanna Czenczek wrote:
> bdrv_pad_request() was the main user of qemu_iovec_init_extended().
> HEAD^ has removed that use, so we can remove qemu_iovec_init_extended()
> now.
> 
> The only remaining user is qemu_iovec_init_slice(), which can easily
> inline the small part it really needs.
> 
> Note that qemu_iovec_init_extended() offered a memcpy() optimization to
> initialize the new I/O vector.  qemu_iovec_concat_iov(), which is used
> to replace its functionality, does not, but calls qemu_iovec_add() for
> every single element.  If we decide this optimization was important, we
> will need to re-implement it in qemu_iovec_concat_iov(), which might
> also benefit its pre-existing users.
> 
> Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
> ---
>  include/qemu/iov.h |  5 ---
>  util/iov.c         | 79 +++++++---------------------------------------
>  2 files changed, 11 insertions(+), 73 deletions(-)
>

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org