Re: linux-next: build warning after merge of the tip tree

From: Ingo Molnar
Date: Wed Dec 14 2016 - 03:33:41 EST

* Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:

> Hi all,
> After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
> produced this warning:
> fs/ubifs/dir.c: In function 'ubifs_readdir':
> fs/ubifs/dir.c:629:13: warning: 'fstr_real_len' may be used uninitialized in this function [-Wmaybe-uninitialized]
> fstr.len = fstr_real_len;
> ^
> Introduced by commit
> f4f61d2cc6d8 ("ubifs: Implement encrypted filenames")
> This is a false positive because assignment and use are both protected by
> "if (encrypted)".
> I have no idea why this did not turn up earlier in my builds.

FYI, f4f61d2cc6d8 is not in the -tip tree, so it cannot possibly have introduced
this warning.