invalidate_inode_pages2_range — remove range of pages from an address_space
int invalidate_inode_pages2_range
(struct address_space * mapping, pgoff_t start, pgoff_t end);
the address_space
the page offset 'from' which to invalidate
the page offset 'to' which to invalidate (inclusive)
Any pages which are found to be mapped into pagetables are unmapped prior to invalidation.
Returns -EIO if any pages could not be invalidated.