Re: [Qemu-devel] [PATCH v4 1/6] pc: Don't prematurely explode QEMUMachineInitArgs

[Laszlo Ersek <lersek@redhat.com>]

On 08/16/13 13:13, armbru@redhat.com wrote:

>  static void pc_init_isa(QEMUMachineInitArgs *args)
>  {
> -    ram_addr_t ram_size = args->ram_size;
> -    const char *cpu_model = args->cpu_model;
> -    const char *kernel_filename = args->kernel_filename;
> -    const char *kernel_cmdline = args->kernel_cmdline;
> -    const char *initrd_filename = args->initrd_filename;
> -    const char *boot_device = args->boot_device;
>      has_pci_info = false;
> -    if (cpu_model == NULL)
> -        cpu_model = "486";
> +    if (!args->cpu_model) {
> +        args->cpu_model = "486";
> +    }

This modifies *args.

IIUC, args here points to the "args" auto variable in main().
"args.cpu_model" is initialized from the standalone "cpu_model"
variable. That one in turn is either NULL, or points to a command line
argument. Ie. "args.cpu_model" is never expected to be freed, and the
underlying char array is not expected to be modified. OK.

Reviewed-by: Laszlo Ersek <lersek@redhat.com>