From: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
Date: Tue, 5 Feb 2013 15:03:07 +0000 (+0400)
Subject: FIX instrumentation '__switch_to' error
X-Git-Tag: accepted/tizen/mobile/20160407.001200~829
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=91a5a179ee6415500208ff51d99b8108999828e1;p=platform%2Fkernel%2Fswap-modules.git

FIX instrumentation '__switch_to' error

add processing critical sections
---

diff --git a/kprobe/dbi_kprobes.c b/kprobe/dbi_kprobes.c
index 880a0c8..9d52be2 100644
--- a/kprobe/dbi_kprobes.c
+++ b/kprobe/dbi_kprobes.c
@@ -849,8 +849,12 @@ static void unpatch_suspended_task_ret_addr(struct task_struct *p, struct kretpr
 	{
 		ri = find_ri_pc_mod(p, rp);
 		if(ri) {
+			unsigned long flags;
 			rm_task_trampoline(p, ri);
+
+			spin_lock_irqsave(&kretprobe_lock, flags);
 			recycle_rp_inst(ri);
+			spin_unlock_irqrestore(&kretprobe_lock, flags);
 		}
 	}
 }