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.
CC: linux-e...@vger.kernel.org
CC: "Theodore Ts'o" <ty...@mit.edu>
Signed-off-by: Jan Kara <j...@suse.cz>
---
fs/ext4/file.c | 14 ++++----------
1 file changed, 4 insertions(+), 10 deletions(-)
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index ddca17c7875a..6821070a388b 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -478,12 +478,11 @@ 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);
- 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;
@@ -502,9 +501,6 @@ 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)) {
@@ -544,12 +540,10 @@ static int ext4_find_unwritten_pgoff(struct inode *inode,
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;
--
2.12.3
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