From: Jan Kara <jack@xxxxxxx> Subject: mm: add variant of pagevec_lookup_range_tag() taking number of pages Currently pagevec_lookup_range_tag() takes number of pages to look up but most users don't need this. Create a new function pagevec_lookup_range_nr_tag() that takes maximum number of pages to lookup for Ceph which wants this functionality so that we can drop nr_pages argument from pagevec_lookup_range_tag(). Link: http://lkml.kernel.org/r/20171009151359.31984-13-jack@xxxxxxx Signed-off-by: Jan Kara <jack@xxxxxxx> Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/pagevec.h | 3 +++ mm/swap.c | 9 +++++++++ 2 files changed, 12 insertions(+) diff -puN include/linux/pagevec.h~mm-add-variant-of-pagevec_lookup_range_tag-taking-number-of-pages include/linux/pagevec.h --- a/include/linux/pagevec.h~mm-add-variant-of-pagevec_lookup_range_tag-taking-number-of-pages +++ a/include/linux/pagevec.h @@ -41,6 +41,9 @@ static inline unsigned pagevec_lookup(st unsigned pagevec_lookup_range_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, pgoff_t end, int tag, unsigned nr_pages); +unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned max_pages); static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, int tag, unsigned nr_pages) diff -puN mm/swap.c~mm-add-variant-of-pagevec_lookup_range_tag-taking-number-of-pages mm/swap.c --- a/mm/swap.c~mm-add-variant-of-pagevec_lookup_range_tag-taking-number-of-pages +++ a/mm/swap.c @@ -996,6 +996,15 @@ unsigned pagevec_lookup_range_tag(struct } EXPORT_SYMBOL(pagevec_lookup_range_tag); +unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned max_pages) +{ + pvec->nr = find_get_pages_range_tag(mapping, index, end, tag, + min_t(unsigned int, max_pages, PAGEVEC_SIZE), pvec->pages); + return pagevec_count(pvec); +} +EXPORT_SYMBOL(pagevec_lookup_range_nr_tag); /* * Perform any setup for the swap system */ _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
