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034f1b331e
Due to I/O buffering the helper may return successfully before the proc handler has a chance to execute. To catch this case wait up to 1 second to verify spl_kallsyms_lookup_name_fn was updated to a non SYMBOL_POISON value. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes zfsonlinux/zfs#699 Closes zfsonlinux/zfs#859
45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://github.com/behlendorf/spl/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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\*****************************************************************************/
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#ifndef _SPL_KALLSYMS_COMPAT_H
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#define _SPL_KALLSYMS_COMPAT_H
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#define SYMBOL_POISON ((void*)0xabcddcba)
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#ifdef HAVE_KALLSYMS_LOOKUP_NAME
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#include <linux/kallsyms.h>
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#define spl_kallsyms_lookup_name(name) kallsyms_lookup_name(name)
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#else
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extern wait_queue_head_t spl_kallsyms_lookup_name_waitq;
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typedef unsigned long (*kallsyms_lookup_name_t)(const char *);
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extern kallsyms_lookup_name_t spl_kallsyms_lookup_name_fn;
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#define spl_kallsyms_lookup_name(name) spl_kallsyms_lookup_name_fn(name)
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#endif /* HAVE_KALLSYMS_LOOKUP_NAME */
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#endif /* _SPL_KALLSYMS_COMPAT_H */
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