pagecache_get_page
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## Name

pagecache_get_page — find and get a page reference

## Synopsis

`struct page * pagecache_get_page (` | struct address_space * mapping,
| pgoff_t offset,
| int fgp_flags,
| gfp_t gfp_mask`)`;

## Arguments

`mapping`

  the address_space to search

`offset`

  the page index

`fgp_flags`

  PCG flags

`gfp_mask`

  gfp mask to use for the page cache data page allocation

## Description

Looks up the page cache slot at `mapping` & `offset`.

PCG flags modify how the page is returned.

## FGP_ACCESSED

the page will be marked accessed

## FGP_LOCK

Page is return locked

## FGP_CREAT

If page is not present then a new page is allocated using `gfp_mask` and added to the page cache and the VM's LRU list. The page is returned locked and with an increased refcount. Otherwise, `NULL` is returned.

If FGP_LOCK or FGP_CREAT are specified then the function may sleep even if the GFP flags specified for FGP_CREAT are atomic.

If there is a page cache page, it is returned with an increased refcount.

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