x86/unwind: Compile kretprobe fixup code only if CONFIG_KRETPROBES=y

Compile kretprobe related stacktrace entry recovery code and
unwind_state::kr_cur field only when CONFIG_KRETPROBES=y.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/arch/x86/include/asm/unwind.h b/arch/x86/include/asm/unwind.h
index fca2e783e3ce8d79c1b70f30d4685bb8ba45f2c4..2a1f8734416dcf4e56b4776ff39d4c042dc3e26b 100644 (file)
--- a/arch/x86/include/asm/unwind.h
+++ b/arch/x86/include/asm/unwind.h
@@ -16,7 +16,9 @@ struct unwind_state {
        unsigned long stack_mask;
        struct task_struct *task;
        int graph_idx;
+#ifdef CONFIG_KRETPROBES
        struct llist_node *kr_cur;
+#endif
        bool error;
 #if defined(CONFIG_UNWINDER_ORC)
        bool signal, full_regs;
@@ -105,9 +107,13 @@ static inline
 unsigned long unwind_recover_kretprobe(struct unwind_state *state,
                                       unsigned long addr, unsigned long *addr_p)
 {
+#ifdef CONFIG_KRETPROBES
        return is_kretprobe_trampoline(addr) ?
                kretprobe_find_ret_addr(state->task, addr_p, &state->kr_cur) :
                addr;
+#else
+       return addr;
+#endif
 }
 
 /* Recover the return address modified by kretprobe and ftrace_graph. */