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ext4: use pagevec_lookup_range() in ext4_find_unwritten_pgoff()

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Use pagevec_lookup_range() in ext4_find_unwritten_pgoff() since we are
interested only in pages in the given range.  Simplify the logic as a
result of not getting pages out of range and index getting automatically
advanced.

Link: http://lkml.kernel.org/r/20170726114704.7626-6-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: "Theodore Ts'o" <tytso@mit.edu>
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 16:21:27 -07:00 committed by Linus Torvalds
parent c10f778ddf
commit dec0da7b60
1 changed files with 4 additions and 10 deletions
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14
fs/ext4/file.c
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@ -464,12 +464,11 @@ static int ext4_find_unwritten_pgoff(struct inode *inode,
pagevec_init(&pvec, 0);
do {
int i, num;
int i;
unsigned long nr_pages;
num = min_t(pgoff_t, end - index, PAGEVEC_SIZE - 1) + 1;
nr_pages = pagevec_lookup(&pvec, inode->i_mapping, &index,
(pgoff_t)num);
nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping,
&index, end, PAGEVEC_SIZE);
if (nr_pages == 0)
break;
@ -488,9 +487,6 @@ static int ext4_find_unwritten_pgoff(struct inode *inode,
goto out;
}
if (page->index > end)
goto out;
lock_page(page);
if (unlikely(page->mapping != inode->i_mapping)) {
@ -533,12 +529,10 @@ next:
unlock_page(page);
}
/* The no. of pages is less than our desired, we are done. */
if (nr_pages < num)
break;
pagevec_release(&pvec);
} while (index <= end);
/* There are no pages upto endoff - that would be a hole in there. */
if (whence == SEEK_HOLE && lastoff < endoff) {
found = 1;
*offset = lastoff;