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Subject[tip:perf/core] kprobes: Convert kprobe_exceptions_notify to use NOKPROBE_SYMBOL
Commit-ID:  5f6bee34707973ea7879a7857fd63ddccc92fff3
Gitweb: http://git.kernel.org/tip/5f6bee34707973ea7879a7857fd63ddccc92fff3
Author: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
AuthorDate: Wed, 8 Mar 2017 22:34:15 +0530
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 14 Mar 2017 15:17:40 -0300

kprobes: Convert kprobe_exceptions_notify to use NOKPROBE_SYMBOL

commit fc62d0207ae0 ("kprobes: Introduce weak variant of
kprobe_exceptions_notify()") used the __kprobes annotation to exclude
kprobe_exceptions_notify from being probed. Since NOKPROBE_SYMBOL() is a
better way to do this enabling the symbol to be discovered as being
blacklisted, change over to using NOKPROBE_SYMBOL().

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/3f25bf400da5c222cd9b10eec6ded2d6b58209f8.1488991670.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
kernel/kprobes.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 448759d..4780ec23 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1740,11 +1740,12 @@ void unregister_kprobes(struct kprobe **kps, int num)
}
EXPORT_SYMBOL_GPL(unregister_kprobes);

-int __weak __kprobes kprobe_exceptions_notify(struct notifier_block *self,
- unsigned long val, void *data)
+int __weak kprobe_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data)
{
return NOTIFY_DONE;
}
+NOKPROBE_SYMBOL(kprobe_exceptions_notify);

static struct notifier_block kprobe_exceptions_nb = {
.notifier_call = kprobe_exceptions_notify,
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