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 * mapping

the address_space to search

pgoff_t offset

the 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.