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nu11secur1ty
GitHub Repository: nu11secur1ty/Kali-Linux
 Path: blob/master/ALFA-W1F1/RTL8814AU/os_dep/linux/rtw_rhashtable.c
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/******************************************************************************

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 *

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 * Copyright(c) 2007 - 2017 Realtek Corporation.

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 *

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 * This program is free software; you can redistribute it and/or modify it

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 * under the terms of version 2 of the GNU General Public License as

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 * published by the Free Software Foundation.

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 *

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 * This program 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 for

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 * more details.

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 *

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 *****************************************************************************/

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#ifdef CONFIG_RTW_MESH /* for now, only promised for kernel versions we support mesh */

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#include <drv_types.h>

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int rtw_rhashtable_walk_enter(rtw_rhashtable *ht, rtw_rhashtable_iter *iter)

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{

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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0))

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	rhashtable_walk_enter((ht), (iter));

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	return 0;

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#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0))

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	return rhashtable_walk_init((ht), (iter), GFP_ATOMIC);

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#else

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	/* kernel >= 4.4.0 rhashtable_walk_init use GFP_KERNEL to alloc, spin_lock for assignment */

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	iter->ht = ht;

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	iter->p = NULL;

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	iter->slot = 0;

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	iter->skip = 0;

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	iter->walker = kmalloc(sizeof(*iter->walker), GFP_ATOMIC);

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	if (!iter->walker)

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		return -ENOMEM;

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	spin_lock(&ht->lock);

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	iter->walker->tbl =

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		rcu_dereference_protected(ht->tbl, lockdep_is_held(&ht->lock));

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	list_add(&iter->walker->list, &iter->walker->tbl->walkers);

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	spin_unlock(&ht->lock);

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	return 0;

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#endif

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}

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#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0))

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#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0))

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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))

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static inline int is_vmalloc_addr(const void *x)

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{

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#ifdef CONFIG_MMU

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	unsigned long addr = (unsigned long)x;

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	return addr >= VMALLOC_START && addr < VMALLOC_END;

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#else

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	return 0;

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#endif

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}

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#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)) */

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void kvfree(const void *addr)

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{

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	if (is_vmalloc_addr(addr))

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		vfree(addr);

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	else

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		kfree(addr);

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}

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#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0)) */

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#include "rhashtable.c"

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#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0)) */

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#endif /* CONFIG_RTW_MESH */

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