mirror_zfs/lib/libspl/include/sys/cmn_err.h
Attila Fülöp 5f3611121d
spl: cmn_err_once() should be usable in brace-less if else statements
Commit 11913870 (#14567) added cmn_err_once() by #define'ing a
compound statement but failed to consider usage in a single
statement brace-less if else.

Fix the problem by using the common "do {} while (0)" construct.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #14629
2023-03-15 11:13:25 -07:00

65 lines
1.8 KiB
C

/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 https://opensource.org/licenses/CDDL-1.0.
* 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]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _LIBSPL_SYS_CMN_ERR_H
#define _LIBSPL_SYS_CMN_ERR_H
#include <atomic.h>
#define cmn_err_once(ce, ...) \
do { \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
cmn_err(ce, __VA_ARGS__); \
} \
} while (0)
#define vcmn_err_once(ce, fmt, ap) \
do { \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vcmn_err(ce, fmt, ap); \
} \
} while (0)
#define zcmn_err_once(zone, ce, ...) \
do { \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
zcmn_err(zone, ce, __VA_ARGS__); \
} \
} while (0)
#define vzcmn_err_once(zone, ce, fmt, ap) \
do { \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vzcmn_err(zone, ce, fmt, ap); \
} \
} while (0)
#endif