Re: [Qemu-devel] [PATCH v2] replace functions which are only available in glib-2.24

[Thomas Huth <thuth@redhat.com>]

On 15.05.2018 08:31, Olaf Hering wrote:
> Currently the minimal supported version of glib is 2.22.
> Since testing is done with a glib that claims to be 2.22, but in fact
> has APIs from newer version of glib, this bug was not caught during
> submit of the patch referenced below.
> 
> Replace g_realloc_n, which is available only since 2.24, with g_renew.
> 
> Fixes commit 418026ca43 ("util: Introduce vfio helpers")
> 
> Signed-off-by: Olaf Hering <olaf@aepfle.de>
> ---
>  This must go into stable-2.12.

In that case please CC: qemu-stable@nongnu.org (done now).

Reviewed-by: Thomas Huth <thuth@redhat.com>

>  util/vfio-helpers.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c
> index 006674c916..1d9272efa4 100644
> --- a/util/vfio-helpers.c
> +++ b/util/vfio-helpers.c
> @@ -522,8 +522,7 @@ static IOVAMapping *qemu_vfio_add_mapping(QEMUVFIOState *s,
>  
>      assert(index >= 0);
>      s->nr_mappings++;
> -    s->mappings = g_realloc_n(s->mappings, sizeof(s->mappings[0]),
> -                              s->nr_mappings);
> +    s->mappings = g_renew(IOVAMapping, s->mappings, s->nr_mappings);
>      insert = &s->mappings[index];
>      shift = s->nr_mappings - index - 1;
>      if (shift) {
> @@ -577,8 +576,7 @@ static void qemu_vfio_undo_mapping(QEMUVFIOState *s, IOVAMapping *mapping,
>      memmove(mapping, &s->mappings[index + 1],
>              sizeof(s->mappings[0]) * (s->nr_mappings - index - 1));
>      s->nr_mappings--;
> -    s->mappings = g_realloc_n(s->mappings, sizeof(s->mappings[0]),
> -                              s->nr_mappings);
> +    s->mappings = g_renew(IOVAMapping, s->mappings, s->nr_mappings);
>  }
>  
>  /* Check if the mapping list is (ascending) ordered. */
>