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authorKeshavamurthy Anil S <anil.s.keshavamurthy@intel.com>2006-01-11 15:17:41 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-11 21:42:12 -0500
commitdf019b1d8b893d0f0ee5a9b0f71486f0892561ae (patch)
tree9d2ced14291502af1ca687b5d854d8394cbfb84d /include/linux/kprobes.h
parentef43bc4fc32bec8fda7bae8948b774616dc9e496 (diff)
[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 <anil.s.keshavamurthy> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/kprobes.h')
-rw-r--r--include/linux/kprobes.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 10005bc92a31..669756bc20a2 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -68,6 +68,9 @@ struct kprobe {
68 /* list of kprobes for multi-handler support */ 68 /* list of kprobes for multi-handler support */
69 struct list_head list; 69 struct list_head list;
70 70
71 /* Indicates that the corresponding module has been ref counted */
72 unsigned int mod_refcounted;
73
71 /*count the number of times this probe was temporarily disarmed */ 74 /*count the number of times this probe was temporarily disarmed */
72 unsigned long nmissed; 75 unsigned long nmissed;
73 76