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

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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>
This commit is contained in:
Masami Hiramatsu 2021-10-21 09:54:42 +09:00 committed by Steven Rostedt (VMware)
parent e44e81c5b9
commit 811b93ffaa
1 changed files with 6 additions and 0 deletions
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6
arch/x86/include/asm/unwind.h
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@ -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. */