/******************************************************************************
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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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#include <drv_types.h>
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#if defined(CONFIG_RTW_WDS) || defined(CONFIG_RTW_MESH) /* for now, only promised for kernel versions we support mesh */
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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 /* defined(CONFIG_RTW_WDS) || defined(CONFIG_RTW_MESH) */
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