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blkio-throttle: Fix link failure failure on i386 

o Randy Dunlap reported following linux-next failure. This patch fixes it.

on i386:

blk-throttle.c:(.text+0x1abb8): undefined reference to `__udivdi3'
blk-throttle.c:(.text+0x1b1dc): undefined reference to `__udivdi3'

o bytes_per_second interface is 64bit and I was continuing to do 64 bit
  division even on 32bit platform without help of special macros/functions
  hence the failure.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Vivek Goyal 2010-10-01 14:51:14 +02:00 committed by Jens Axboe
parent fe0714377e
commit 3aad5d3ee4
1 changed files with 10 additions and 6 deletions
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16
block/blk-throttle.c
View File

@ -378,7 +378,8 @@ throtl_slice_used(struct throtl_data *td, struct throtl_grp *tg, bool rw)
static inline void
throtl_trim_slice(struct throtl_data *td, struct throtl_grp *tg, bool rw)
{
unsigned long nr_slices, bytes_trim, time_elapsed, io_trim;
unsigned long nr_slices, time_elapsed, io_trim;
u64 bytes_trim, tmp;
BUG_ON(time_before(tg->slice_end[rw], tg->slice_start[rw]));
@ -396,8 +397,10 @@ throtl_trim_slice(struct throtl_data *td, struct throtl_grp *tg, bool rw)
if (!nr_slices)
return;
tmp = tg->bps[rw] * throtl_slice * nr_slices;
do_div(tmp, HZ);
bytes_trim = tmp;
bytes_trim = (tg->bps[rw] * throtl_slice * nr_slices)/HZ;
io_trim = (tg->iops[rw] * throtl_slice * nr_slices)/HZ;
if (!bytes_trim && !io_trim)
@ -415,7 +418,7 @@ throtl_trim_slice(struct throtl_data *td, struct throtl_grp *tg, bool rw)
tg->slice_start[rw] += nr_slices * throtl_slice;
throtl_log_tg(td, tg, "[%c] trim slice nr=%lu bytes=%lu io=%lu"
throtl_log_tg(td, tg, "[%c] trim slice nr=%lu bytes=%llu io=%lu"
" start=%lu end=%lu jiffies=%lu",
rw == READ ? 'R' : 'W', nr_slices, bytes_trim, io_trim,
tg->slice_start[rw], tg->slice_end[rw], jiffies);
@ -462,7 +465,7 @@ static bool tg_with_in_bps_limit(struct throtl_data *td, struct throtl_grp *tg,
struct bio *bio, unsigned long *wait)
{
bool rw = bio_data_dir(bio);
u64 bytes_allowed, extra_bytes;
u64 bytes_allowed, extra_bytes, tmp;
unsigned long jiffy_elapsed, jiffy_wait, jiffy_elapsed_rnd;
jiffy_elapsed = jiffy_elapsed_rnd = jiffies - tg->slice_start[rw];
@ -473,8 +476,9 @@ static bool tg_with_in_bps_limit(struct throtl_data *td, struct throtl_grp *tg,
jiffy_elapsed_rnd = roundup(jiffy_elapsed_rnd, throtl_slice);
bytes_allowed = (tg->bps[rw] * jiffies_to_msecs(jiffy_elapsed_rnd))
/ MSEC_PER_SEC;
tmp = tg->bps[rw] * jiffies_to_msecs(jiffy_elapsed_rnd);
do_div(tmp, MSEC_PER_SEC);
bytes_allowed = tmp;
if (tg->bytes_disp[rw] + bio->bi_size <= bytes_allowed) {
if (wait)