Re: [v10][PATCH 11/16] tools/libxl: detect and avoid conflicts with RDM

[Ian Jackson <Ian.Jackson@eu.citrix.com>]

Chen, Tiejun writes ("Re: [v10][PATCH 11/16] tools/libxl: detect and avoid conflicts with RDM"):
> +static void
> +add_rdm_entry(libxl__gc *gc, libxl_domain_config *d_config,
> +              uint64_t rdm_start, uint64_t rdm_size, int rdm_policy)
> +{
> +    d_config->num_rdms++;
> +    d_config->rdms = libxl__realloc(NOGC, d_config->rdms,
> +                            d_config->num_rdms * sizeof(libxl_device_rdm));
> +
> +    d_config->rdms[d_config->num_rdms - 1].start = rdm_start;
> +    d_config->rdms[d_config->num_rdms - 1].size = rdm_size;
> +    d_config->rdms[d_config->num_rdms - 1].policy = rdm_policy;
> +}


But, I wrote:

   Can I suggest a function

      void add_rdm_entry(libxl__gc *gc, libxl_domain_config *d_config,
                    uint64_t rdm_start, uint64_t rdm_size, int rdm_policy)

   which assumes that d_config->num_rdms is set correctly, and increments
   it ?

   (Please put the increment at the end so that the assignments are to
   ->rdms[d_config->num_rdms], or perhaps make a convenience alias.)

Note the last paragraph.

This is now the third time I have posted that text.  It is the fifth
request or clarification I have had to make about this very small
area.  I have to say that I'm finding this rather frustrating.

Ian.