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kprobes, notifier: Use NOKPROBE_SYMBOL macro in notifier 

Use NOKPROBE_SYMBOL macro to protect functions from
kprobes instead of __kprobes annotation in notifier.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20140417081835.26341.56128.stgit@ltc230.yrl.intra.hitachi.co.jp
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Masami Hiramatsu 2014-04-17 17:18:35 +09:00 committed by Ingo Molnar
parent 3da0f18007
commit b40a2cb6e0
1 changed files with 13 additions and 9 deletions
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22
kernel/notifier.c
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@ -71,9 +71,9 @@ static int notifier_chain_unregister(struct notifier_block **nl,
* @returns: notifier_call_chain returns the value returned by the
* last notifier function called.
*/
static int __kprobes notifier_call_chain(struct notifier_block **nl,
unsigned long val, void *v,
int nr_to_call, int *nr_calls)
static int notifier_call_chain(struct notifier_block **nl,
unsigned long val, void *v,
int nr_to_call, int *nr_calls)
{
int ret = NOTIFY_DONE;
struct notifier_block *nb, *next_nb;
@ -102,6 +102,7 @@ static int __kprobes notifier_call_chain(struct notifier_block **nl,
}
return ret;
}
NOKPROBE_SYMBOL(notifier_call_chain);
/*
* Atomic notifier chain routines. Registration and unregistration
@ -172,9 +173,9 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister);
* Otherwise the return value is the return value
* of the last notifier function called.
*/
int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
unsigned long val, void *v,
int nr_to_call, int *nr_calls)
int __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
unsigned long val, void *v,
int nr_to_call, int *nr_calls)
{
int ret;
@ -184,13 +185,15 @@ int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
return ret;
}
EXPORT_SYMBOL_GPL(__atomic_notifier_call_chain);
NOKPROBE_SYMBOL(__atomic_notifier_call_chain);
int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh,
unsigned long val, void *v)
int atomic_notifier_call_chain(struct atomic_notifier_head *nh,
unsigned long val, void *v)
{
return __atomic_notifier_call_chain(nh, val, v, -1, NULL);
}
EXPORT_SYMBOL_GPL(atomic_notifier_call_chain);
NOKPROBE_SYMBOL(atomic_notifier_call_chain);
/*
* Blocking notifier chain routines. All access to the chain is
@ -527,7 +530,7 @@ EXPORT_SYMBOL_GPL(srcu_init_notifier_head);
static ATOMIC_NOTIFIER_HEAD(die_chain);
int notrace __kprobes notify_die(enum die_val val, const char *str,
int notrace notify_die(enum die_val val, const char *str,
struct pt_regs *regs, long err, int trap, int sig)
{
struct die_args args = {
@ -540,6 +543,7 @@ int notrace __kprobes notify_die(enum die_val val, const char *str,
};
return atomic_notifier_call_chain(&die_chain, val, &args);
}
NOKPROBE_SYMBOL(notify_die);
int register_die_notifier(struct notifier_block *nb)
{