linux-next: build warning after merge of the btrfs tree

From: Stephen Rothwell
Date: Sun Feb 23 2020 - 17:57:54 EST

Hi all,

After merging the btrfs tree, today's linux-next build (x86_64
allmodconfig) produced this warning:

fs/btrfs/check-integrity.c: In function 'btrfsic_process_superblock_dev_mirror':
fs/btrfs/check-integrity.c:916:9: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
916 | return ret;
| ^~~

Introduced by commit

5a03d907a555 ("btrfs: remove buffer_heads form super block mirror integrity checking")

I think this is not a false positive since ret is only assigned is a
"goto out" is executed.

Stephen Rothwell

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