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kbuild test robot gets the following compilation warning using gcc 7.4
cross compilation for c6x (GCC_VERSION=7.4.0 make.cross ARCH=c6x).
In file included from include/asm-generic/bug.h:18:0,
from arch/c6x/include/asm/bug.h:12,
from include/linux/bug.h:5,
from include/linux/thread_info.h:12,
from include/asm-generic/current.h:5,
from ./arch/c6x/include/generated/asm/current.h:1,
from include/linux/sched.h:12,
from include/linux/blkdev.h:5,
from drivers//scsi/sd_zbc.c:11:
drivers//scsi/sd_zbc.c: In function 'sd_zbc_read_zones':
>> include/linux/kernel.h:62:48: warning: 'zone_blocks' may be used
uninitialized in this function [-Wmaybe-uninitialized]
#define __round_mask(x, y) ((__typeof__(x))((y)-1))
^
drivers//scsi/sd_zbc.c:464:6: note: 'zone_blocks' was declared here
u32 zone_blocks;
^~~~~~~~~~~
This is a false-positive report. The variable zone_blocks is always
initialized in sd_zbc_check_zones() before use. It is not initialized
only and only if sd_zbc_check_zones() fails.
Avoid this warning by initializing the zone_blocks variable to 0.
Fixes: 5f832a395859 ("scsi: sd_zbc: Fix sd_zbc_check_zones() error checks")
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
0cdc58580b