[dm-devel] [PATCH 3.18-stable] dm bufio: hide bogus warning

[Greg KH]

On Fri, Apr 21, 2017 at 03:41:10PM +0200, Arnd Bergmann wrote:
> mips-gcc-5.3 warns about correct code on linux-3.18 and earlier:
> 
> In file included from ../include/linux/blkdev.h:4:0,
>                  from ../drivers/md/dm-bufio.h:12,
>                  from ../drivers/md/dm-bufio.c:9:
> ../drivers/md/dm-bufio.c: In function 'alloc_buffer':
> ../include/linux/sched.h:1975:56: warning: 'noio_flag' may be used uninitialized in this function [-Wmaybe-uninitialized]
>   current->flags = (current->flags & ~PF_MEMALLOC_NOIO) | flags;
>                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
> ../drivers/md/dm-bufio.c:325:11: note: 'noio_flag' was declared here
> 
> The warning disappeared on later kernels with this commit: be0c37c985ed
> ("MIPS: Rearrange PTE bits into fixed positions.")  I assume this only
> happened because it changed some inlining decisions.
> 
> On 3.18.y, we can shut up the warning by adding an extra initialization.
> 
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

Now applied, thanks.

greg k-h