1READ_CACHE_PAGE(9)        Memory Management in Linux        READ_CACHE_PAGE(9)
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NAME

6       read_cache_page - read into page cache, fill it if needed
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SYNOPSIS

9       struct page * read_cache_page(struct address_space * mapping,
10                                     pgoff_t index,
11                                     int (*filler) (void *, struct page *),
12                                     void * data);
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ARGUMENTS

15       mapping
16           the page's address_space
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18       index
19           the page index
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21       filler
22           function to perform the read
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24       data
25           first arg to filler(data, page) function, often left as NULL
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DESCRIPTION

28       Read into the page cache. If a page already exists, and PageUptodate is
29       not set, try to fill the page then wait for it to become unlocked.
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31       If the page does not get brought uptodate, return -EIO.
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34Kernel Hackers Manual 3.10         June 2019                READ_CACHE_PAGE(9)
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