diff options
Diffstat (limited to 'include/linux/hyperv.h')
| -rw-r--r-- | include/linux/hyperv.h | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 64698ec8f2ac..6256cc34c4a6 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1,25 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * * Copyright (c) 2011, Microsoft Corporation. * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 Temple - * Place - Suite 330, Boston, MA 02111-1307 USA. - * * Authors: * Haiyang Zhang <haiyangz@microsoft.com> * Hank Janssen <hjanssen@microsoft.com> * K. Y. Srinivasan <kys@microsoft.com> - * */ #ifndef _HYPERV_H @@ -141,6 +128,11 @@ struct hv_ring_buffer_info { u32 ring_datasize; /* < ring_size */ u32 priv_read_index; + /* + * The ring buffer mutex lock. This lock prevents the ring buffer from + * being freed while the ring buffer is being accessed. + */ + struct mutex ring_buffer_mutex; }; @@ -1206,7 +1198,7 @@ struct hv_ring_buffer_debug_info { }; -int hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info, +int hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, struct hv_ring_buffer_debug_info *debug_info); /* Vmbus interface */ |