On Mon, 23 Dec 2019 at 11:03, Wei Liu <w...@xen.org> wrote:
>
> Clang complains:
>
> In file included from synic.c:15:
> /builds/xen-project/xen/xen/include/asm/guest/hyperv-tlfs.h:900:18: error:
> field 'hv_vp_set' with variable sized type 'struct hv_vpset' not at the end
> of a struct or class is a GNU extension
> [-Werror,-Wgnu-variable-sized-type-not-at-end]
> struct hv_vpset hv_vp_set;
> ^
> 1 error generated.
> /builds/xen-project/xen/xen/Rules.mk:198: recipe for target 'synic.o' failed
> make[6]: *** [synic.o] Error 1
>
> Comment out the last variable size array from hv_tlb_flush_ex to fix
> clang builds.
>
> Signed-off-by: Wei Liu <li...@microsoft.com>
> Cc: Paul Durrant <p...@xen.org>
Reviewed-by: Paul Durrant <p...@xen.org>
> ---
> xen/include/asm-x86/guest/hyperv-tlfs.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/xen/include/asm-x86/guest/hyperv-tlfs.h
> b/xen/include/asm-x86/guest/hyperv-tlfs.h
> index fe9fb232d0..5b43f99de8 100644
> --- a/xen/include/asm-x86/guest/hyperv-tlfs.h
> +++ b/xen/include/asm-x86/guest/hyperv-tlfs.h
> @@ -908,12 +908,12 @@ struct hv_tlb_flush {
> u64 gva_list[];
> } __packed;
>
> -/* HvFlushVirtualAddressSpaceEx, HvFlushVirtualAddressListEx hypercalls */
> +/* HvFlushVirtualAddressSpaceEx hypercall */
> struct hv_tlb_flush_ex {
> u64 address_space;
> u64 flags;
> struct hv_vpset hv_vp_set;
> - u64 gva_list[];
> + /* u64 gva_list[]; */
> } __packed;
>
> struct hv_partition_assist_pg {
> --
> 2.20.1
>
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