linux-kernel - [PATCH -tip RFC v2 12/22] x86/hw_breakpoint: Use NOKPROBE_SYMBOL macro in hw

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Date:	Fri, 15 Nov 2013 04:53:50 +0000
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-arch@...r.kernel.org,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	x86@...nel.org, Oleg Nesterov <oleg@...hat.com>,
	lkml <linux-kernel@...r.kernel.org>,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	virtualization@...ts.linux-foundation.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH -tip RFC v2 12/22] x86/hw_breakpoint: Use NOKPROBE_SYMBOL
 macro in hw_breakpoint

Use NOKPROBE_SYMBOL macro to protect functions from kprobes
instead of __kprobe annotation in hw_breakpoint.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Oleg Nesterov <oleg@...hat.com>
---
 arch/x86/kernel/hw_breakpoint.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index f66ff16..cb4df84 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -425,7 +425,7 @@ EXPORT_SYMBOL_GPL(hw_breakpoint_restore);
  * NOTIFY_STOP returned for all other cases
  *
  */
-static int __kprobes hw_breakpoint_handler(struct die_args *args)
+static int hw_breakpoint_handler(struct die_args *args)
 {
 	int i, cpu, rc = NOTIFY_STOP;
 	struct perf_event *bp;
@@ -508,11 +508,12 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args)
 
 	return rc;
 }
+NOKPROBE_SYMBOL(hw_breakpoint_handler);
 
 /*
  * Handle debug exception notifications.
  */
-int __kprobes hw_breakpoint_exceptions_notify(
+int hw_breakpoint_exceptions_notify(
 		struct notifier_block *unused, unsigned long val, void *data)
 {
 	if (val != DIE_DEBUG)
@@ -520,6 +521,7 @@ int __kprobes hw_breakpoint_exceptions_notify(
 
 	return hw_breakpoint_handler(data);
 }
+NOKPROBE_SYMBOL(hw_breakpoint_exceptions_notify);
 
 void hw_breakpoint_pmu_read(struct perf_event *bp)
 {

--
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