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/*
* SPU core dump code
*
* (C) Copyright 2006 IBM Corp.
*
* Author: Dwayne Grant McConnell <decimal@us.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/file.h>
#include <linux/module.h>
#include <linux/syscalls.h>
#include <asm/spu.h>
static struct spu_coredump_calls spu_coredump_calls;
static DEFINE_MUTEX(spu_coredump_mutex);
int arch_notes_size(void)
{
long ret;
struct module *owner = spu_coredump_calls.owner;
ret = -ENOSYS;
mutex_lock(&spu_coredump_mutex);
if (owner && try_module_get(owner)) {
ret = spu_coredump_calls.arch_notes_size();
module_put(owner);
}
mutex_unlock(&spu_coredump_mutex);
return ret;
}
void arch_write_notes(struct file *file)
{
struct module *owner = spu_coredump_calls.owner;
mutex_lock(&spu_coredump_mutex);
if (owner && try_module_get(owner)) {
spu_coredump_calls.arch_write_notes(file);
module_put(owner);
}
mutex_unlock(&spu_coredump_mutex);
}
int register_arch_coredump_calls(struct spu_coredump_calls *calls)
{
if (spu_coredump_calls.owner)
return -EBUSY;
mutex_lock(&spu_coredump_mutex);
spu_coredump_calls.arch_notes_size = calls->arch_notes_size;
spu_coredump_calls.arch_write_notes = calls->arch_write_notes;
spu_coredump_calls.owner = calls->owner;
mutex_unlock(&spu_coredump_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(register_arch_coredump_calls);
void unregister_arch_coredump_calls(struct spu_coredump_calls *calls)
{
BUG_ON(spu_coredump_calls.owner != calls->owner);
mutex_lock(&spu_coredump_mutex);
spu_coredump_calls.owner = NULL;
mutex_unlock(&spu_coredump_mutex);
}
EXPORT_SYMBOL_GPL(unregister_arch_coredump_calls);
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