Re: [PATCH] btrfs: Fix -Wmaybe-uninitialized warning

[Qiang Ma]

在 2025/12/19 04:37, David Sterba 写道:
> On Thu, Dec 18, 2025 at 04:16:18PM +0800, Qiang Ma wrote:
> > Fix a -Wmaybe-uninitialized warning by initializing
> > the variable to NULL.
> >
> > $ make CFLAGS_tree-log.o=-Wmaybe-uninitialized
> >
> > In file included from fs/btrfs/ctree.h:21,
> >                   from fs/btrfs/tree-log.c:12:
> > fs/btrfs/accessors.h: In function 'replay_one_buffer':
> > fs/btrfs/accessors.h:66:16: warning: 'inode_item' may be used uninitialized [-Wmaybe-uninitialized]
> >     66 |         return btrfs_get_##bits(eb, s, offsetof(type, member));         \
> >        |                ^~~~~~~~~~
> > fs/btrfs/tree-log.c:2803:42: note: 'inode_item' declared here
> >   2803 |                 struct btrfs_inode_item *inode_item;
> >        |                                          ^~~~~~~~~~
> >
> > Warning was found when compiling using loongarch64-gcc 12.3.1.
> We have the -Wmaybe-uninitialized warning enabled per fs/btrfs/
> directory, there are no other known reports fixing the uninitialized
> inode_item so this might be specific to loongarch gcc 12.x. I'll add the
Yes, x86 and arm64 did not report this warning issue.
> patch to for-next as we still want to get all the warnings fixed, thanks.