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Yang Hongyang
22c06289dc
There are cases where we only need to use the hypercall buffer data, and do not use the xc_hypercall_buffer_t struct. DECLARE_HYPERCALL_BUFFER_SHADOW defines a user pointer that can allow us to access the hypercall buffer data but it also defines a xc_hypercall_buffer_t that we don't use, the compiler will report arg unused error. Add __attribute__((unused)) before xc_hypercall_buffer_t to avoid the compiler error. Example cases: In send_all_pages(), we only need to use the hypercall buffer data which is a dirty bitmap, we set the dirty bitmap to all dirty and call send_dirty_pages, we will not use the xc_hypercall_buffer_t and hypercall to retrieve the dirty bitmap. In send_some_pages(), we will also only need to use the dirty_bitmap. the retrieve dirty bitmap hypercall are done by the caller. Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com> CC: Ian Campbell <Ian.Campbell@citrix.com> CC: Ian Jackson <Ian.Jackson@eu.citrix.com> CC: Wei Liu <wei.liu2@citrix.com> CC: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Ian Campbell <Ian.Campbell@citrix.com>