pie: relocs -- Fix compilation on ARM

Otherwise getting

 | parasite-syscall.c: In function ‘parasite_infect_seized’:
 | parasite-syscall.c:1222:5: error: ‘elf_relocs’ undeclared (first use in this function)

Simply wrap the @elf_relocs_apply with macros.
Reported-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -2390,9 +2390,7 @@ static int remap_restorer_blob(void *addr)
 		return -1;
 	}
 
-	elf_relocs_apply(addr, addr, sizeof(restorer_blob),
-			 restorer_relocs, ARRAY_SIZE(restorer_relocs));
-
+	ELF_RELOCS_APPLY_RESTORER(addr, addr);
 	return 0;
 }
 

parasite-syscall.c

@@ -1218,8 +1218,7 @@ struct parasite_ctl *parasite_infect_seized(pid_t pid, struct pstree_item *item,
 	pr_info("Putting parasite blob into %p->%p\n", ctl->local_map, ctl->remote_map);
 	memcpy(ctl->local_map, parasite_blob, sizeof(parasite_blob));
 
-	elf_relocs_apply(ctl->local_map, ctl->remote_map, sizeof(parasite_blob),
-			 parasite_relocs, ARRAY_SIZE(parasite_relocs));
+	ELF_RELOCS_APPLY_PARASITE(ctl->local_map, ctl->remote_map);
 
 	/* Setup the rest of a control block */
 	ctl->parasite_ip	= (unsigned long)parasite_sym(ctl->remote_map, __export_parasite_head_start);

pie/pie-relocs.h

@@ -7,11 +7,23 @@
 #include "config.h"
 
 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_32) || defined(CONFIG_PPC64)
+
+extern __maybe_unused void elf_relocs_apply(void *mem, void *vbase, size_t size,
+					    elf_reloc_t *elf_relocs, size_t nr_relocs);
 #define PIE_SIZE(__blob_name)	(round_up(sizeof(__blob_name) + nr_gotpcrel * sizeof(long), PAGE_SIZE))
-extern __maybe_unused void elf_relocs_apply(void *mem, void *vbase, size_t size, elf_reloc_t *elf_relocs, size_t nr_relocs);
+#define ELF_RELOCS_APPLY_PARASITE(__mem, __vbase)			\
+	elf_relocs_apply(__mem, __vbase, sizeof(parasite_blob),		\
+			 parasite_relocs, ARRAY_SIZE(parasite_relocs))
+#define ELF_RELOCS_APPLY_RESTORER(__mem, __vbase)			\
+	elf_relocs_apply(__mem, __vbase, sizeof(restorer_blob),		\
+			 restorer_relocs, ARRAY_SIZE(restorer_relocs))
+
 #else
+
 #define PIE_SIZE(__blob_name)	(round_up(sizeof(__blob_name), PAGE_SIZE))
-static always_inline void elf_relocs_apply(void *mem, void *vbase, size_t size, elf_reloc_t *elf_relocs, size_t nr_relocs) { }
+#define ELF_RELOCS_APPLY_PARASITE(__mem, __vbase)
+#define ELF_RELOCS_APPLY_RESTORER(__mem, __vbase)
+
 #endif
 
 #endif /* __PIE_RELOCS_H__ */