find_lock_entry — locate, pin and lock a page cache entry
struct page * find_lock_entry ( | struct address_space * mapping, |
pgoff_t offset); |
struct address_space * mappingthe address_space to search
pgoff_t offsetthe page cache index
Looks up the page cache slot at mapping & offset. If there is a
page cache page, it is returned locked and with an increased
refcount.
If the slot holds a shadow entry of a previously evicted page, or a swap entry from shmem/tmpfs, it is returned.
Otherwise, NULL is returned.
find_lock_entry may sleep.