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mm/readahead: add kerneldoc for read_pages #1353

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mm/readahead: add kerneldoc for read_pages #1353

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11 changes: 11 additions & 0 deletions mm/readahead.c
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Original file line number Diff line number Diff line change
Expand Up @@ -146,6 +146,17 @@ file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping)
}
EXPORT_SYMBOL_GPL(file_ra_state_init);

/**
* read_pages() - Start IO for a contiguous range of allocated folios in the
* page cache.
* @rac: Readahead control.
*
* When read_pages() returns, it is guaranteed that all of the folios will have
* been processed or removed so that ``readahead_count(rac) == 0``. However,
* that does not imply that ``readahead_index(rac)`` will be updated to point
* to the end of the originally requested range because, for example, the
* filesystem may expand the range upwards.
*/
static void read_pages(struct readahead_control *rac)
{
const struct address_space_operations *aops = rac->mapping->a_ops;
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