linux-kernel - Re: linux-next: build warnings after merge of the overlayfs tree

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Date:   Wed, 8 Mar 2017 10:44:01 +0200
From:   Amir Goldstein <amir73il@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Miklos Szeredi <miklos@...redi.hu>, linux-next@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build warnings after merge of the overlayfs tree

On Wed, Mar 8, 2017 at 1:16 AM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi Miklos,
>
> After merging the overlayfs tree, today's linux-next build (powerpc
> ppc64_defconfig) produced these warnings:
>
> fs/overlayfs/inode.c:322:30: warning: 'ovl_i_mutex_key' defined but not used [-Wunused-variable]
>  static struct lock_class_key ovl_i_mutex_key[FILESYSTEM_MAX_STACK_DEPTH];
>                               ^
> fs/overlayfs/inode.c:323:30: warning: 'ovl_i_mutex_dir_key' defined but not used [-Wunused-variable]
>  static struct lock_class_key ovl_i_mutex_dir_key[FILESYSTEM_MAX_STACK_DEPTH];
>                               ^
>
> Introduced by commit
>
>   a41471e8eff8 ("ovl: lockdep annotate of nested stacked overlayfs inode lock")
>
> CONFIG_LOCKDEP is not set for this build.
>

Thanks Stephen!

Miklos, I posted v5 of the patch with a fix.