On Fri, May 03, 2019 at 10:21:05AM +1000, Stephen Rothwell wrote:
> Hi David,
>
> After merging the btrfs-kdave tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
>
> fs/btrfs/props.c: In function 'inherit_props':
> fs/btrfs/props.c:389:4: warning: 'num_bytes' may be used uninitialized in this function [-Wmaybe-uninitialized]
> btrfs_block_rsv_release(fs_info, trans->block_rsv,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> num_bytes);
> ~~~~~~~~~~
>
> Probably introduced by commit
>
> b835a4a3faec ("btrfs: use the existing reserved items for our first prop for inheritance")
>
> Looks like a false positive to me.
Agreed and gcc 8.3.1 does not report that. Kbuild bot reported that as
well and it uses 7.x.
