READ_CACHE_PAGE(9)                  Memory Management in Linux                 READ_CACHE_PAGE(9)



NAME
       read_cache_page - read into page cache, fill it if needed

SYNOPSIS
       struct page * read_cache_page(struct address_space * mapping, pgoff_t index,
                                     int (*filler) (void *, struct page *), void * data);

ARGUMENTS
       mapping
           the page's address_space

       index
           the page index

       filler
           function to perform the read

       data
           first arg to filler(data, page) function, often left as NULL

DESCRIPTION
       Read into the page cache. If a page already exists, and PageUptodate is not set, try to
       fill the page and wait for it to become unlocked.

       If the page does not get brought uptodate, return -EIO.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                        READ_CACHE_PAGE(9)