Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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// SPDX-License-Identifier: GPL-2.0-or-later
/* FS-Cache netfs (client) registration
*
* Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#define FSCACHE_DEBUG_LEVEL COOKIE
#include <linux/module.h>
#include <linux/slab.h>
#include "internal.h"
/*
* register a network filesystem for caching
*/
int __fscache_register_netfs(struct fscache_netfs *netfs)
{
<------>struct fscache_cookie *candidate, *cookie;
<------>_enter("{%s}", netfs->name);
<------>/* allocate a cookie for the primary index */
<------>candidate = fscache_alloc_cookie(&fscache_fsdef_index,
<------><------><------><------><------> &fscache_fsdef_netfs_def,
<------><------><------><------><------> netfs->name, strlen(netfs->name),
<------><------><------><------><------> &netfs->version, sizeof(netfs->version),
<------><------><------><------><------> netfs, 0);
<------>if (!candidate) {
<------><------>_leave(" = -ENOMEM");
<------><------>return -ENOMEM;
<------>}
<------>candidate->flags = 1 << FSCACHE_COOKIE_ENABLED;
<------>/* check the netfs type is not already present */
<------>cookie = fscache_hash_cookie(candidate);
<------>if (!cookie)
<------><------>goto already_registered;
<------>if (cookie != candidate) {
<------><------>trace_fscache_cookie(candidate, fscache_cookie_discard, 1);
<------><------>fscache_free_cookie(candidate);
<------>}
<------>fscache_cookie_get(cookie->parent, fscache_cookie_get_register_netfs);
<------>atomic_inc(&cookie->parent->n_children);
<------>netfs->primary_index = cookie;
<------>pr_notice("Netfs '%s' registered for caching\n", netfs->name);
<------>trace_fscache_netfs(netfs);
<------>_leave(" = 0");
<------>return 0;
already_registered:
<------>fscache_cookie_put(candidate, fscache_cookie_put_dup_netfs);
<------>_leave(" = -EEXIST");
<------>return -EEXIST;
}
EXPORT_SYMBOL(__fscache_register_netfs);
/*
* unregister a network filesystem from the cache
* - all cookies must have been released first
*/
void __fscache_unregister_netfs(struct fscache_netfs *netfs)
{
<------>_enter("{%s.%u}", netfs->name, netfs->version);
<------>fscache_relinquish_cookie(netfs->primary_index, NULL, false);
<------>pr_notice("Netfs '%s' unregistered from caching\n", netfs->name);
<------>_leave("");
}
EXPORT_SYMBOL(__fscache_unregister_netfs);