mm/mm_slot.h

Source file repositories/reference/linux-study-clean/mm/mm_slot.h

File Facts

System
Linux kernel
Corpus path
mm/mm_slot.h
Extension
.h
Size
1383 bytes
Lines
56
Domain
Core OS
Bucket
Memory Management
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

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 */

Annotation

Implementation Notes