dm bufio: hide bogus warning

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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: be0c37c985
("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@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Arnd Bergmann 2017-05-05 21:46:50 +02:00 • committed by Ben Hutchings

parent e14bf178a4

commit bc51148bb9

1 changed files with 1 additions and 0 deletions

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drivers/md/dm-bufio.c

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