block: iolatency: avoid 64-bit division

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On 32-bit architectures, dividing a 64-bit number needs to use the
do_div() function or something like it to avoid a link failure:

block/blk-iolatency.o: In function `iolatency_prfill_limit':
blk-iolatency.c:(.text+0x8cc): undefined reference to `__aeabi_uldivmod'

Using div_u64() gives us the best output and avoids the need for an
explicit cast.

Fixes: d706751215 ("block: introduce blk-iolatency io controller")
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Arnd Bergmann 2018-07-10 17:21:34 +02:00 • committed by Jens Axboe

parent 3993e501bf

commit 88b7210c81

1 changed files with 1 additions and 2 deletions

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block/blk-iolatency.c

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