erofs: update erofs_inode_is_data_compressed helper

As Christoph said, "This looks like a really obsfucated
way to write:
	return datamode == EROFS_INODE_FLAT_COMPRESSION ||
		datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY; "

Although I had my own consideration, it's the right way for now.

[1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/
Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Link: https://lore.kernel.org/r/20190904020912.63925-6-gaoxiang25@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h
index 59dcc2e8cb02fca8868e729bd7eeafc95186deb1..87d7ae82339a430f3d2bc109d71d0c3fbe54c0ee 100644 (file)
--- a/fs/erofs/erofs_fs.h
+++ b/fs/erofs/erofs_fs.h
@@ -62,9 +62,8 @@ enum {
 
 static inline bool erofs_inode_is_data_compressed(unsigned int datamode)
 {
-       if (datamode == EROFS_INODE_FLAT_COMPRESSION)
-               return true;
-       return datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY;
+       return datamode == EROFS_INODE_FLAT_COMPRESSION ||
+               datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY;
 }
 
 /* bit definitions of inode i_advise */