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authorJan Kara <jack@suse.cz>2017-11-15 17:34:33 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:03 -0800
commit72b045aecdd856b083521f2a963705b4c2e59680 (patch)
tree586bdb2ee2ed3322084e10355b02e4e9c8fd622a /include/linux/pagemap.h
parent6b4c54e3787bc03e810062bd257a3b05fd9c72d6 (diff)
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mm: implement find_get_pages_range_tag()
Patch series "Ranged pagevec tagged lookup", v3. In this series I provide a ranged variant of pagevec_lookup_tag() and use it in places where it makes sense. This series removes some common code and it also has a potential for speeding up some operations similarly as for pagevec_lookup_range() (but for now I can think of only artificial cases where this happens). This patch (of 16): Implement a variant of find_get_pages_tag() that stops iterating at given index. Lots of users of this function (through pagevec_lookup()) actually want a range lookup and all of them are currently open-coding this. Also create corresponding pagevec_lookup_range_tag() function. Link: http://lkml.kernel.org/r/20171009151359.31984-2-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Bob Peterson <rpeterso@redhat.com> Cc: Chao Yu <yuchao0@huawei.com> Cc: David Howells <dhowells@redhat.com> Cc: David Sterba <dsterba@suse.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Steve French <sfrench@samba.org> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/pagemap.h')
-rw-r--r--include/linux/pagemap.h12
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index e08b5339023c..956d6a80e126 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -366,8 +366,16 @@ static inline unsigned find_get_pages(struct address_space *mapping,
}
unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t start,
unsigned int nr_pages, struct page **pages);
-unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index,
- int tag, unsigned int nr_pages, struct page **pages);
+unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index,
+ pgoff_t end, int tag, unsigned int nr_pages,
+ struct page **pages);
+static inline unsigned find_get_pages_tag(struct address_space *mapping,
+ pgoff_t *index, int tag, unsigned int nr_pages,
+ struct page **pages)
+{
+ return find_get_pages_range_tag(mapping, index, (pgoff_t)-1, tag,
+ nr_pages, pages);
+}
unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
int tag, unsigned int nr_entries,
struct page **entries, pgoff_t *indices);