RTL88x2BU-Linux-Driver/os_dep/linux/rtw_rhashtable.c

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/******************************************************************************
*
* Copyright(c) 2007 - 2017 Realtek Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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.
*
*****************************************************************************/
#ifdef CONFIG_RTW_MESH /* for now, only promised for kernel versions we support mesh */
#include <drv_types.h>
int rtw_rhashtable_walk_enter(rtw_rhashtable *ht, rtw_rhashtable_iter *iter)
{
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0))
rhashtable_walk_enter((ht), (iter));
return 0;
#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0))
return rhashtable_walk_init((ht), (iter), GFP_ATOMIC);
#else
/* kernel >= 4.4.0 rhashtable_walk_init use GFP_KERNEL to alloc, spin_lock for assignment */
iter->ht = ht;
iter->p = NULL;
iter->slot = 0;
iter->skip = 0;
iter->walker = kmalloc(sizeof(*iter->walker), GFP_ATOMIC);
if (!iter->walker)
return -ENOMEM;
spin_lock(&ht->lock);
iter->walker->tbl =
rcu_dereference_protected(ht->tbl, lockdep_is_held(&ht->lock));
list_add(&iter->walker->list, &iter->walker->tbl->walkers);
spin_unlock(&ht->lock);
return 0;
#endif
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0))
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0))
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
static inline int is_vmalloc_addr(const void *x)
{
#ifdef CONFIG_MMU
unsigned long addr = (unsigned long)x;
return addr >= VMALLOC_START && addr < VMALLOC_END;
#else
return 0;
#endif
}
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)) */
void kvfree(const void *addr)
{
if (is_vmalloc_addr(addr))
vfree(addr);
else
kfree(addr);
}
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0)) */
#include "rhashtable.c"
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0)) */
#endif /* CONFIG_RTW_MESH */