version/livepatch: Move xen_build_id_check to version.h

It makes more sense for it to be there. However that
means the version.h has now a dependency on <xen/elfstructs.h>
as the Elf_Note is a macro.

The elfstructs.h has a dependency on types.h as well so
we need that. We cannot put that #include <xen/types.h>
in elfstructs.h as that file is used by tools and they
do not have such file.

Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

xen/include/xen/livepatch.h

@@ -42,8 +42,6 @@ int livepatch_op(struct xen_sysctl_livepatch_op *);
 void check_for_livepatch_work(void);
 unsigned long livepatch_symbols_lookup_by_name(const char *symname);
 bool_t is_patch(const void *addr);
-int xen_build_id_check(const Elf_Note *n, unsigned int n_sz,
-                       const void **p, unsigned int *len);
 
 /* Arch hooks. */
 int arch_livepatch_verify_elf(const struct livepatch_elf *elf);

xen/include/xen/version.h

@@ -1,6 +1,9 @@
 #ifndef __XEN_VERSION_H__
 #define __XEN_VERSION_H__
 
+#include <xen/types.h>
+#include <xen/elfstructs.h>
+
 const char *xen_compile_date(void);
 const char *xen_compile_time(void);
 const char *xen_compile_by(void);
@@ -15,4 +18,9 @@ const char *xen_banner(void);
 const char *xen_deny(void);
 int xen_build_id(const void **p, unsigned int *len);
 
+#ifdef BUILD_ID
+int xen_build_id_check(const Elf_Note *n, unsigned int n_sz,
+                       const void **p, unsigned int *len);
+#endif
+
 #endif /* __XEN_VERSION_H__ */