Re: [Qemu-devel] [PATCH 0/3] tighten scope of accidentally global variables

[Blue Swirl <blauwirbel@gmail.com>]

On Mon, May 21, 2012 at 10:03 AM, Jim Meyering <jim@meyering.net> wrote:
> From: Jim Meyering <meyering@redhat.com>
>
> I noticed this commit,
>
>    virtio-pci: add missing 'static'
>
> which made this change:
>
>    > -const MemoryRegionPortio virtio_portio[] = {
>    > +static const MemoryRegionPortio virtio_portio[] = {
>
> and wondered if there were other variables like that.
> The following command shows that there are:
> [note that there are probably more: this finds only those
>  for which the variable name appears in only one source file. ]

Also, only for files at the top level. What about functions? ;-)

>
>    $ for i in $(nm -e *.o|sed -n 's/.* [BCDGRS] //p'); do \
>        test $(git grep -lw $i|wc -l) = 1 && echo $i;done
>    BlockDeviceIoStatus_lookup
>    SpiceQueryMouseMode_lookup
>    qemu_boot_opts
>    qemu_option_rom_opts
>    vmstate_info_scsi_requests
>    xen_xcg
>
> The *_lookup names are false positives, since the symbols are actually
> used from two or more .o files.  Here are patches for the others:
>
> Jim Meyering (3):
>  xen: remove unused global, xen_xcg
>  scsi: declare vmstate_info_scsi_requests to be static
>  qemu-config: qemu_option_rom_opts, qemu_boot_opts: declare static
>
>  hw/scsi-bus.c    | 2 +-
>  hw/xen_backend.c | 1 -
>  qemu-config.c    | 4 ++--
>  3 files changed, 3 insertions(+), 4 deletions(-)
>
> --
> 1.7.10.2.552.gaa3bb87