[Xen-devel] [PATCH v2] x86/hyperv: change hv_tlb_flush_ex to fix clang build

[Wei Liu <wl@xxxxxxx>]

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 <liuwe@xxxxxxxxxxxxx>
Cc: Paul Durrant <paul@xxxxxxx>
---
 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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