From: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Check CONFIG_FREEZER instead of CONFIG_PM because kprobe booster
depends on freeze_processes() and thaw_processes() when CONFIG_PREEMPT=y.
This fixes a linkage error which occurs when CONFIG_PREEMPT=y, CONFIG_PM=y
and CONFIG_FREEZER=n.
Reported-by: Cheng Renquan <crquan@xxxxxxxxx>
Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
---
arch/ia64/kernel/kprobes.c | 2 +-
arch/x86/kernel/kprobes.c | 2 +-
kernel/kprobes.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
Index: linux-2.6/arch/ia64/kernel/kprobes.c
===================================================================
--- linux-2.6.orig/arch/ia64/kernel/kprobes.c
+++ linux-2.6/arch/ia64/kernel/kprobes.c
@@ -868,7 +868,7 @@ static int __kprobes pre_kprobes_handler
return 1;
ss_probe:
-#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PM)
+#if !defined(CONFIG_PREEMPT) || defined(CONFIG_FREEZER)
if (p->ainsn.inst_flag == INST_FLAG_BOOSTABLE && !p->post_handler) {
/* Boost up -- we can execute copied instructions directly */
ia64_psr(regs)->ri = p->ainsn.slot;
Index: linux-2.6/arch/x86/kernel/kprobes.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/kprobes.c
+++ linux-2.6/arch/x86/kernel/kprobes.c
@@ -445,7 +445,7 @@ void __kprobes arch_prepare_kretprobe(st
static void __kprobes setup_singlestep(struct kprobe *p, struct pt_regs *regs,
struct kprobe_ctlblk *kcb)
{
-#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PM)
+#if !defined(CONFIG_PREEMPT) || defined(CONFIG_FREEZER)
if (p->ainsn.boostable == 1 && !p->post_handler) {
/* Boost up -- we can execute copied instructions directly */
reset_current_kprobe();
Index: linux-2.6/kernel/kprobes.c
===================================================================
--- linux-2.6.orig/kernel/kprobes.c
+++ linux-2.6/kernel/kprobes.c
@@ -122,7 +122,7 @@ static int collect_garbage_slots(void);
static int __kprobes check_safety(void)
{
int ret = 0;
-#if defined(CONFIG_PREEMPT) && defined(CONFIG_PM)
+#if defined(CONFIG_PREEMPT) && defined(CONFIG_FREEZER)
ret = freeze_processes();
if (ret == 0) {
struct task_struct *p, *q;
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