56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#ifndef _LINUX_MM_SLOT_H
|
|
#define _LINUX_MM_SLOT_H
|
|
|
|
#include <linux/hashtable.h>
|
|
#include <linux/slab.h>
|
|
|
|
/*
|
|
* struct mm_slot - hash lookup from mm to mm_slot
|
|
* @hash: link to the mm_slots hash list
|
|
* @mm_node: link into the mm_slots list
|
|
* @mm: the mm that this information is valid for
|
|
*/
|
|
struct mm_slot {
|
|
struct hlist_node hash;
|
|
struct list_head mm_node;
|
|
struct mm_struct *mm;
|
|
};
|
|
|
|
#define mm_slot_entry(ptr, type, member) \
|
|
container_of(ptr, type, member)
|
|
|
|
static inline void *mm_slot_alloc(struct kmem_cache *cache)
|
|
{
|
|
if (!cache) /* initialization failed */
|
|
return NULL;
|
|
return kmem_cache_zalloc(cache, GFP_KERNEL);
|
|
}
|
|
|
|
static inline void mm_slot_free(struct kmem_cache *cache, void *objp)
|
|
{
|
|
kmem_cache_free(cache, objp);
|
|
}
|
|
|
|
#define mm_slot_lookup(_hashtable, _mm) \
|
|
({ \
|
|
struct mm_slot *tmp_slot, *mm_slot = NULL; \
|
|
\
|
|
hash_for_each_possible(_hashtable, tmp_slot, hash, (unsigned long)_mm) \
|
|
if (_mm == tmp_slot->mm) { \
|
|
mm_slot = tmp_slot; \
|
|
break; \
|
|
} \
|
|
\
|
|
mm_slot; \
|
|
})
|
|
|
|
#define mm_slot_insert(_hashtable, _mm, _mm_slot) \
|
|
({ \
|
|
_mm_slot->mm = _mm; \
|
|
hash_add(_hashtable, &_mm_slot->hash, (unsigned long)_mm); \
|
|
})
|
|
|
|
#endif /* _LINUX_MM_SLOT_H */
|