Commit 93d3b714 authored by Jan Kara's avatar Jan Kara Committed by Linus Torvalds
Browse files

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@suse.cz


Signed-off-by: default avatarJan Kara <jack@suse.cz>
Reviewed-by: default avatarDaniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2b9775ae

include/linux/pagevec.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -41,6 +41,9 @@ static inline unsigned pagevec_lookup(struct pagevec *pvec, 
unsigned pagevec_lookup_range_tag(struct pagevec *pvec,

unsigned pagevec_lookup_range_tag(struct pagevec *pvec,

		struct address_space *mapping, pgoff_t *index, pgoff_t end,

		struct address_space *mapping, pgoff_t *index, pgoff_t end,

		int tag, unsigned nr_pages);

		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,

static inline unsigned pagevec_lookup_tag(struct pagevec *pvec,

		struct address_space *mapping, pgoff_t *index, int tag,

		struct address_space *mapping, pgoff_t *index, int tag,

		unsigned nr_pages)

		unsigned nr_pages)

mm/swap.c

+9 −0
Original line number Original line Diff line number Diff line
@@ -996,6 +996,15 @@ unsigned pagevec_lookup_range_tag(struct pagevec *pvec, 
}

}

EXPORT_SYMBOL(pagevec_lookup_range_tag);

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

 * Perform any setup for the swap system

 */

 */

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