mirror_zfs/include/linux/kmap_compat.h
Chunwei Chen 17888ae30d Add compatibility layer for {kmap,kunmap}_atomic
Starting from linux-2.6.37, {kmap,kunmap}_atomic takes 1 argument instead of 2.
We use zfs_{kmap,kunmap}_atomic as wrappers and always take 2 argument, but
ignore the 2nd for newer kernel.

Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2015-08-24 10:13:25 -07:00

41 lines
1.3 KiB
C

/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
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* CDDL HEADER END
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/*
* Copyright (c) 2015 by Chunwei Chen. All rights reserved.
*/
#ifndef _ZFS_KMAP_H
#define _ZFS_KMAP_H
#include <linux/highmem.h>
#ifdef HAVE_1ARG_KMAP_ATOMIC
/* 2.6.37 API change */
#define zfs_kmap_atomic(page, km_type) kmap_atomic(page)
#define zfs_kunmap_atomic(addr, km_type) kunmap_atomic(addr)
#else
#define zfs_kmap_atomic(page, km_type) kmap_atomic(page, km_type)
#define zfs_kunmap_atomic(addr, km_type) kunmap_atomic(addr, km_type)
#endif
#endif /* _ZFS_KMAP_H */