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mm: make pagevec_lookup() update index

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Make pagevec_lookup() (and underlying find_get_pages()) update index to
the next page where iteration should continue.  Most callers want this
and also pagevec_lookup_tag() already does this.

Link: http://lkml.kernel.org/r/20170726114704.7626-3-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Kara 2017-09-06 16:21:18 -07:00 • committed by Linus Torvalds
parent 26b433d0da
commit d72dc8a25a
11 changed files with 32 additions and 37 deletions
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10
fs/buffer.c
View file

@ -1633,13 +1633,12 @@ void clean_bdev_aliases(struct block_device *bdev, sector_t block, sector_t len)
end = (block + len - 1) >> (PAGE_SHIFT - bd_inode->i_blkbits);
pagevec_init(&pvec, 0);
while (index <= end && pagevec_lookup(&pvec, bd_mapping, index,
while (index <= end && pagevec_lookup(&pvec, bd_mapping, &index,
min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1)) {
for (i = 0; i < pagevec_count(&pvec); i++) {
struct page *page = pvec.pages[i];
index = page->index;
if (index > end)
if (page->index > end)
break;
if (!page_has_buffers(page))
continue;
@ -1670,7 +1669,6 @@ unlock_page:
}
pagevec_release(&pvec);
cond_resched();
index++;
}
}
EXPORT_SYMBOL(clean_bdev_aliases);
@ -3552,7 +3550,8 @@ page_cache_seek_hole_data(struct inode *inode, loff_t offset, loff_t length,
unsigned want, nr_pages, i;
want = min_t(unsigned, end - index, PAGEVEC_SIZE);
nr_pages = pagevec_lookup(&pvec, inode->i_mapping, index, want);
nr_pages = pagevec_lookup(&pvec, inode->i_mapping, &index,
want);
if (nr_pages == 0)
break;
@ -3594,7 +3593,6 @@ page_cache_seek_hole_data(struct inode *inode, loff_t offset, loff_t length,
if (nr_pages < want)
break;
index = pvec.pages[i - 1]->index + 1;
pagevec_release(&pvec);
} while (index < end);