X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=probes%2Flttng-kprobes.c;h=c0a15e47a0c0b4db1cef98c27cf960dead54790f;hb=c88f762e4c83e3ff148f8e7962d3d9c52d64ff4e;hp=f4e4f2ea801e88f4b4d05bf4dd1472837a693799;hpb=79150a4903b5f31695fcd1d9655555ba6dc4bfa4;p=lttng-modules.git

diff --git a/probes/lttng-kprobes.c b/probes/lttng-kprobes.c
index f4e4f2ea..c0a15e47 100644
--- a/probes/lttng-kprobes.c
+++ b/probes/lttng-kprobes.c
@@ -1,33 +1,21 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
  * probes/lttng-kprobes.c
  *
  * LTTng kprobes integration module.
  *
  * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <linux/module.h>
 #include <linux/kprobes.h>
 #include <linux/slab.h>
-#include "../lttng-events.h"
-#include "../wrapper/ringbuffer/frontend_types.h"
-#include "../wrapper/vmalloc.h"
-#include "../wrapper/irqflags.h"
-#include "../lttng-tracer.h"
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/irqflags.h>
+#include <lttng-tracer.h>
+#include <blacklist/kprobes.h>
 
 static
 int lttng_kprobes_handler_pre(struct kprobe *p, struct pt_regs *regs)
@@ -36,18 +24,18 @@ int lttng_kprobes_handler_pre(struct kprobe *p, struct pt_regs *regs)
 		container_of(p, struct lttng_event, u.kprobe.kp);
 	struct lttng_probe_ctx lttng_probe_ctx = {
 		.event = event,
-		.interruptible = lttng_regs_irqs_disabled(regs),
+		.interruptible = !lttng_regs_irqs_disabled(regs),
 	};
 	struct lttng_channel *chan = event->chan;
 	struct lib_ring_buffer_ctx ctx;
 	int ret;
 	unsigned long data = (unsigned long) p->addr;
 
-	if (unlikely(!ACCESS_ONCE(chan->session->active)))
+	if (unlikely(!READ_ONCE(chan->session->active)))
 		return 0;
-	if (unlikely(!ACCESS_ONCE(chan->enabled)))
+	if (unlikely(!READ_ONCE(chan->enabled)))
 		return 0;
-	if (unlikely(!ACCESS_ONCE(event->enabled)))
+	if (unlikely(!READ_ONCE(event->enabled)))
 		return 0;
 
 	lib_ring_buffer_ctx_init(&ctx, chan->chan, &lttng_probe_ctx, sizeof(data),
@@ -178,8 +166,8 @@ void lttng_kprobes_destroy_private(struct lttng_event *event)
 EXPORT_SYMBOL_GPL(lttng_kprobes_destroy_private);
 
 MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit Kprobes Support");
+MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
+MODULE_DESCRIPTION("LTTng kprobes probes");
 MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
 	__stringify(LTTNG_MODULES_MINOR_VERSION) "."
 	__stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)