arm64: Correct ftrace calls to aarch64_insn_gen_branch_imm()

The aarch64_insn_gen_branch_imm() function takes an enum as the last
argument rather than a bool. It happens to work because
AARCH64_INSN_BRANCH_LINK matches 'true' but better to use the actual
type.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/kernel/ftrace.c

@@ -58,7 +58,8 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
 	u32 new;
 
 	pc = (unsigned long)&ftrace_call;
-	new = aarch64_insn_gen_branch_imm(pc, (unsigned long)func, true);
+	new = aarch64_insn_gen_branch_imm(pc, (unsigned long)func,
+					  AARCH64_INSN_BRANCH_LINK);
 
 	return ftrace_modify_code(pc, 0, new, false);
 }
@@ -72,7 +73,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 	u32 old, new;
 
 	old = aarch64_insn_gen_nop();
-	new = aarch64_insn_gen_branch_imm(pc, addr, true);
+	new = aarch64_insn_gen_branch_imm(pc, addr, AARCH64_INSN_BRANCH_LINK);
 
 	return ftrace_modify_code(pc, old, new, true);
 }
@@ -86,7 +87,7 @@ int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
 	unsigned long pc = rec->ip;
 	u32 old, new;
 
-	old = aarch64_insn_gen_branch_imm(pc, addr, true);
+	old = aarch64_insn_gen_branch_imm(pc, addr, AARCH64_INSN_BRANCH_LINK);
 	new = aarch64_insn_gen_nop();
 
 	return ftrace_modify_code(pc, old, new, true);
@@ -154,7 +155,8 @@ static int ftrace_modify_graph_caller(bool enable)
 	u32 branch, nop;
 
 	branch = aarch64_insn_gen_branch_imm(pc,
-			(unsigned long)ftrace_graph_caller, false);
+					     (unsigned long)ftrace_graph_caller,
+					     AARCH64_INSN_BRANCH_LINK);
 	nop = aarch64_insn_gen_nop();
 
 	if (enable)