obj_free

Name:obj_free

Proto:static void obj_free(struct size_class *class, unsigned long obj)

Type:void

Parameter:

Type	Parameter	Name
struct size_class *	class
unsigned long	obj

1524

obj &= ~Head in allocated object should have OBJ_ALLOCATED_TAG* to identify the object was allocated or not.* It's okay to add the status bit in the least bit because* header keeps handle which is 4byte-aligned address so we* have room for two bit at least.

1525

bj_to_location - get (, ) from encoded object value*@obj: the encoded object value*@page: page object resides in zspage*@obj_idx: object index

1526

f_offset = * Size of objects stored in this class. Must be multiple * of ZS_ALIGN. * f_objidx & ~PAGE_MASK

1527

zspage = get_zspage(f_page)

1529

vaddr = kmap_atomic(f_page)

1532

link = vaddr + f_offset

1533

Free object index;* It's valid for non-allocated object = get_freeobj(zspage) << OBJ_TAG_BITS

1534

Prevent people trying to call kunmap_atomic() as if it were kunmap()* kunmap_atomic() should get the return value of kmap_atomic, not the page.(vaddr)

1535

set_freeobj(zspage, f_objidx)

1536

mod_zspage_inuse(zspage, - 1)

1537

ype can be of enum type zs_stat_type or fullness_group

**Caller**
Name	Describe
zs_free
migrate_zspage

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