fix: removal of [smp_]read_barrier_depends (v5.9)

[lttng-modules.git] / probes / lttng-uprobes.c

diff --git a/probes/lttng-uprobes.c b/probes/lttng-uprobes.c
index 47f3599f2baa336dd6c7e543a81aef5070b67efb..bda1d9b46cbce41a5e4a06c2c3b3124e634fbfe3 100644 (file)
--- a/probes/lttng-uprobes.c
+++ b/probes/lttng-uprobes.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
+ *
  * probes/lttng-uprobes.c
  *
  * LTTng uprobes integration module.
@@ -6,19 +7,6 @@
  * Copyright (C) 2013 Yannick Brosseau <yannick.brosseau@gmail.com>
  * 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/fdtable.h>
@@ -52,11 +40,11 @@ int lttng_uprobes_handler_pre(struct uprobe_consumer *uc, struct pt_regs *regs)
                unsigned long ip;
        } payload;
 
-       if (unlikely(!ACCESS_ONCE(chan->session->active)))
+       if (unlikely(!LTTNG_READ_ONCE(chan->session->active)))
                return 0;
-       if (unlikely(!ACCESS_ONCE(chan->enabled)))
+       if (unlikely(!LTTNG_READ_ONCE(chan->enabled)))
                return 0;
-       if (unlikely(!ACCESS_ONCE(event->enabled)))
+       if (unlikely(!LTTNG_READ_ONCE(event->enabled)))
                return 0;
 
        lib_ring_buffer_ctx_init(&ctx, chan->chan, &lttng_probe_ctx,
@@ -67,7 +55,7 @@ int lttng_uprobes_handler_pre(struct uprobe_consumer *uc, struct pt_regs *regs)
                return 0;
 
        /* Event payload. */
-       payload.ip = regs->ip;
+       payload.ip = (unsigned long)instruction_pointer(regs);
 
        lib_ring_buffer_align_ctx(&ctx, lttng_alignof(payload));
        chan->ops->event_write(&ctx, &payload, sizeof(payload));
@@ -173,7 +161,7 @@ int lttng_uprobes_add_callsite(struct lttng_event *event,
        }
 
        /* Ensure the memory we just allocated don't trigger page faults. */
-       wrapper_vmalloc_sync_all();
+       wrapper_vmalloc_sync_mappings();
 
        uprobe_handler->event = event;
        uprobe_handler->up_consumer.handler = lttng_uprobes_handler_pre;