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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
138 lines
2.5 KiB
C
138 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2003 Sistina Software.
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* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
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*
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* Module Author: Heinz Mauelshagen
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*
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* This file is released under the GPL.
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*
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* Path selector registration.
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*/
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#include <linux/device-mapper.h>
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#include <linux/module.h>
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#include "dm-path-selector.h"
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#include <linux/slab.h>
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struct ps_internal {
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struct path_selector_type pst;
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struct list_head list;
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};
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#define pst_to_psi(__pst) container_of((__pst), struct ps_internal, pst)
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static LIST_HEAD(_path_selectors);
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static DECLARE_RWSEM(_ps_lock);
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static struct ps_internal *__find_path_selector_type(const char *name)
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{
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struct ps_internal *psi;
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list_for_each_entry(psi, &_path_selectors, list) {
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if (!strcmp(name, psi->pst.name))
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return psi;
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}
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return NULL;
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}
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static struct ps_internal *get_path_selector(const char *name)
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{
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struct ps_internal *psi;
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down_read(&_ps_lock);
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psi = __find_path_selector_type(name);
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if (psi && !try_module_get(psi->pst.module))
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psi = NULL;
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up_read(&_ps_lock);
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return psi;
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}
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struct path_selector_type *dm_get_path_selector(const char *name)
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{
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struct ps_internal *psi;
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if (!name)
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return NULL;
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psi = get_path_selector(name);
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if (!psi) {
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request_module("dm-%s", name);
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psi = get_path_selector(name);
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}
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return psi ? &psi->pst : NULL;
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}
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void dm_put_path_selector(struct path_selector_type *pst)
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{
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struct ps_internal *psi;
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if (!pst)
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return;
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down_read(&_ps_lock);
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psi = __find_path_selector_type(pst->name);
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if (!psi)
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goto out;
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module_put(psi->pst.module);
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out:
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up_read(&_ps_lock);
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}
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static struct ps_internal *_alloc_path_selector(struct path_selector_type *pst)
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{
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struct ps_internal *psi = kzalloc_obj(*psi);
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if (psi)
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psi->pst = *pst;
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return psi;
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}
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int dm_register_path_selector(struct path_selector_type *pst)
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{
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int r = 0;
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struct ps_internal *psi = _alloc_path_selector(pst);
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if (!psi)
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return -ENOMEM;
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down_write(&_ps_lock);
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if (__find_path_selector_type(pst->name)) {
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kfree(psi);
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r = -EBUSY;
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} else
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list_add(&psi->list, &_path_selectors);
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up_write(&_ps_lock);
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return r;
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}
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EXPORT_SYMBOL_GPL(dm_register_path_selector);
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void dm_unregister_path_selector(struct path_selector_type *pst)
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{
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struct ps_internal *psi;
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down_write(&_ps_lock);
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psi = __find_path_selector_type(pst->name);
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if (WARN_ON(!psi)) {
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up_write(&_ps_lock);
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return;
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}
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list_del(&psi->list);
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up_write(&_ps_lock);
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kfree(psi);
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}
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EXPORT_SYMBOL_GPL(dm_unregister_path_selector);
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