powerpc/inst: ppc_inst_as_u64() becomes ppc_inst_as_ulong()

In order to simplify use on PPC32, change ppc_inst_as_u64()
into ppc_inst_as_ulong() that returns the 32 bits instruction
on PPC32.

Will be used when porting OPTPROBES to PPC32.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/22cadf29620664b600b82026d2a72b8b23351777.1618927318.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/inst.h

@@ -147,13 +147,14 @@ static inline struct ppc_inst *ppc_inst_next(void *location, struct ppc_inst *va
 	return location + ppc_inst_len(tmp);
 }
 
-static inline u64 ppc_inst_as_u64(struct ppc_inst x)
+static inline unsigned long ppc_inst_as_ulong(struct ppc_inst x)
 {
-#ifdef CONFIG_CPU_LITTLE_ENDIAN
-	return (u64)ppc_inst_suffix(x) << 32 | ppc_inst_val(x);
-#else
-	return (u64)ppc_inst_val(x) << 32 | ppc_inst_suffix(x);
-#endif
+	if (IS_ENABLED(CONFIG_PPC32))
+		return ppc_inst_val(x);
+	else if (IS_ENABLED(CONFIG_CPU_LITTLE_ENDIAN))
+		return (u64)ppc_inst_suffix(x) << 32 | ppc_inst_val(x);
+	else
+		return (u64)ppc_inst_val(x) << 32 | ppc_inst_suffix(x);
 }
 
 #define PPC_INST_STR_LEN sizeof("00000000 00000000")

arch/powerpc/kernel/optprobes.c

@@ -264,7 +264,7 @@ int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *p)
 	 * 3. load instruction to be emulated into relevant register, and
 	 */
 	temp = ppc_inst_read((struct ppc_inst *)p->ainsn.insn);
-	patch_imm64_load_insns(ppc_inst_as_u64(temp), 4, buff + TMPL_INSN_IDX);
+	patch_imm64_load_insns(ppc_inst_as_ulong(temp), 4, buff + TMPL_INSN_IDX);
 
 	/*
 	 * 4. branch back from trampoline

arch/powerpc/lib/code-patching.c

@@ -26,7 +26,7 @@ static int __patch_instruction(struct ppc_inst *exec_addr, struct ppc_inst instr
 
 		__put_kernel_nofault(patch_addr, &val, u32, failed);
 	} else {
-		u64 val = ppc_inst_as_u64(instr);
+		u64 val = ppc_inst_as_ulong(instr);
 
 		__put_kernel_nofault(patch_addr, &val, u64, failed);
 	}

arch/powerpc/xmon/xmon.c

@@ -2953,7 +2953,7 @@ generic_inst_dump(unsigned long adr, long count, int praddr,
 		if (!ppc_inst_prefixed(inst))
 			dump_func(ppc_inst_val(inst), adr);
 		else
-			dump_func(ppc_inst_as_u64(inst), adr);
+			dump_func(ppc_inst_as_ulong(inst), adr);
 		printf("\n");
 	}
 	return adr - first_adr;