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btrfs: subpage: make end_compressed_bio_writeback() compatible 

In end_compressed_writeback() we just clear the full page writeback.
For subpage case, if there are two delalloc ranges in the same page, the
2nd range will trigger a BUG_ON() as the page writeback is already
cleared by previous range.

Fix it by using btrfs_page_clamp_clear_writeback() helper.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2021-09-27 15:22:01 +08:00 committed by David Sterba
parent bbbff01a47
commit 741ec653ab
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/compression.c
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@ -334,6 +334,7 @@ out:
static noinline void end_compressed_writeback(struct inode *inode,
const struct compressed_bio *cb)
{
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
unsigned long index = cb->start >> PAGE_SHIFT;
unsigned long end_index = (cb->start + cb->len - 1) >> PAGE_SHIFT;
struct page *pages[16];
@ -356,7 +357,8 @@ static noinline void end_compressed_writeback(struct inode *inode,
for (i = 0; i < ret; i++) {
if (cb->errors)
SetPageError(pages[i]);
end_page_writeback(pages[i]);
btrfs_page_clamp_clear_writeback(fs_info, pages[i],
cb->start, cb->len);
put_page(pages[i]);
}
nr_pages -= ret;