zs_unmap_object

Name:zs_unmap_object

Proto:void zs_unmap_object(struct zs_pool *pool, unsigned long handle)

Type:void

Parameter:

Type	Parameter	Name
struct zs_pool *	pool
unsigned long	handle

1362

obj = handle_to_obj(handle)

1363

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

1364

zspage = get_zspage(page)

1365

get_zspage_mapping(zspage, & class_idx, & fg)

1366

class = size_class[class_idx]

1367

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

1369

area = this_cpu_ptr( & per-cpu VM mapping areas for zspage accesses that cross page boundaries )

1370

If off + * Size of objects stored in this class. Must be multiple * of ZS_ALIGN. <= PAGE_SIZE Then 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.( address of kmap_atomic()'ed pages )

1372

Else

1375

pages[0] = page

1376

pages[1] = get_next_page(page)

1377

BUG_ON(!pages[1])

1379

__zs_unmap_object(area, pages, off, * Size of objects stored in this class. Must be multiple * of ZS_ALIGN.)

1381

The weird & is necessary because sparse considers (void)(var) to be* a direct dereference of percpu variable (var).(per-cpu VM mapping areas for zspage accesses that cross page boundaries )

1383

migrate_read_unlock(zspage)

1384

unpin_tag(handle)

**Caller**
Name	Describe
zs_zpool_unmap

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