From df019b1d8b893d0f0ee5a9b0f71486f0892561ae Mon Sep 17 00:00:00 2001 From: Keshavamurthy Anil S Date: Wed, 11 Jan 2006 12:17:41 -0800 Subject: [PATCH] kprobes: fix unloading of self probed module When a kprobes modules is written in such a way that probes are inserted on itself, then unload of that moudle was not possible due to reference couning on the same module. The below patch makes a check and incrementes the module refcount only if it is not a self probed module. We need to allow modules to probe themself for kprobes performance measurements This patch has been tested on several x86_64, ppc64 and IA64 architectures. Signed-off-by: Anil S Keshavamurthy Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/kprobes.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/kprobes.h') diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 10005bc92a3..669756bc20a 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -68,6 +68,9 @@ struct kprobe { /* list of kprobes for multi-handler support */ struct list_head list; + /* Indicates that the corresponding module has been ref counted */ + unsigned int mod_refcounted; + /*count the number of times this probe was temporarily disarmed */ unsigned long nmissed; -- cgit v1.2.3