powerpc: modules implement R_PPC64_TOCSAVE relocation.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

arch/powerpc/include/uapi/asm/elf.h

@@ -291,9 +291,12 @@ do {									\
 #define R_PPC64_DTPREL16_HIGHERA 104 /* half16	(sym+add)@dtprel@highera */
 #define R_PPC64_DTPREL16_HIGHEST 105 /* half16	(sym+add)@dtprel@highest */
 #define R_PPC64_DTPREL16_HIGHESTA 106 /* half16	(sym+add)@dtprel@highesta */
+#define R_PPC64_TLSGD		107
+#define R_PPC64_TLSLD		108
+#define R_PPC64_TOCSAVE		109
 
 /* Keep this the last entry.  */
-#define R_PPC64_NUM		107
+#define R_PPC64_NUM		110
 
 /* There's actually a third entry here, but it's unused */
 struct ppc64_opd_entry

arch/powerpc/kernel/module_64.c

@@ -454,6 +454,14 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 			*location = value - (unsigned long)location;
 			break;
 
+		case R_PPC64_TOCSAVE:
+			/*
+			 * Marker reloc indicates we don't have to save r2.
+			 * That would only save us one instruction, so ignore
+			 * it.
+			 */
+			break;
+
 		default:
 			printk("%s: Unknown ADD relocation: %lu\n",
 			       me->name,