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authorSrinivasa Ds <srinivasa@in.ibm.com>2008-02-23 15:24:04 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-23 17:13:24 -0800
commit43627582799db317e966ecb0002c2c3c9805ec0f (patch)
treefcfd50780b438d0ec04830faa857de9b86665e76 /kernel
parent0835ab53eab5bbeebe1c135e92fb0c4d483dde17 (diff)
downloadblackbird-op-linux-43627582799db317e966ecb0002c2c3c9805ec0f.tar.gz
blackbird-op-linux-43627582799db317e966ecb0002c2c3c9805ec0f.zip
kprobes: refuse kprobe insertion on add/sub_preempt_counter()
Kprobes makes use of preempt_disable(),preempt_enable_noresched() and these functions inturn call add/sub_preempt_count(). So we need to refuse user from inserting probe in to these functions. This patch disallows user from probing add/sub_preempt_count(). Signed-off-by: Srinivasa DS <srinivasa@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index f28f19e65b59..c4bc8c210958 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3766,7 +3766,7 @@ void scheduler_tick(void)
#if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT)
-void add_preempt_count(int val)
+void __kprobes add_preempt_count(int val)
{
/*
* Underflow?
@@ -3782,7 +3782,7 @@ void add_preempt_count(int val)
}
EXPORT_SYMBOL(add_preempt_count);
-void sub_preempt_count(int val)
+void __kprobes sub_preempt_count(int val)
{
/*
* Underflow?
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