Page cache and adress_space

[Mauricio Lin <mauriciolin2000@xxxxxxxxxxxx>]

Hi all,
 
 Is it enough to check the mapping field (struct address_space) of struct page to figure out if the page is used as page cache?
 
 Something like:
 
 if (page->mapping) {
 ...
 }
 
 BR,
 
 Mauricio Lin.

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