btrfs: Use less confusing condition for uptodate parameter to btrfs_writepage_endio_f...

The uptodate parameter of btrfs_writepage_endio_finish_ordered is used
to signal whether an error has occured while writing the given page.
0 signals an error, which is propagated to callees and 1 signifies
success. In end_compressed_bio_write the ->bi_status is checked and
based on it either BLK_STS_OK (0) or BLK_STS_NOTSUPP (1) are used. While
from functional point of view this is ok it's a for the poor reader of
the code, since the block layer values are conflated with the semantics
of the parameter.

Just use plain 0 or 1. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 4f2a8ae..1463e14 100644 (file)
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -251,7 +251,7 @@ static void end_compressed_bio_write(struct bio *bio)
        cb->compressed_pages[0]->mapping = cb->inode->i_mapping;
        btrfs_writepage_endio_finish_ordered(cb->compressed_pages[0],
                        cb->start, cb->start + cb->len - 1,
-                       bio->bi_status ? BLK_STS_OK : BLK_STS_NOTSUPP);
+                       bio->bi_status == BLK_STS_OK);
        cb->compressed_pages[0]->mapping = NULL;
 
        end_compressed_writeback(inode, cb);