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nbd: use correct div_s64 helper

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The do_div() macro now checks its arguments for the correct type,
and refuses anything other than u64, so we get a warning about
nbd_ioctl passing in an loff_t:

drivers/block/nbd.c: In function '__nbd_ioctl':
drivers/block/nbd.c:757:77: error: comparison of distinct pointer types lacks a cast [-Werror]

This changes the nbd code to use div_s64() instead, which takes
a signed argument.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 37091fdd83 ("nbd: Create size change events for userspace")
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Arnd Bergmann 2016-03-05 00:49:31 +01:00 • committed by Jens Axboe
parent 90beb2e7a0
commit 5e454c67fc
1 changed files with 1 additions and 2 deletions
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3
drivers/block/nbd.c
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@ -753,8 +753,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
}
case NBD_SET_BLKSIZE: {
loff_t bsize = nbd->bytesize;
do_div(bsize, arg);
loff_t bsize = div_s64(nbd->bytesize, arg);
return nbd_size_set(nbd, bdev, arg, bsize);
}