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authorVivek Goyal <vgoyal@redhat.com>2010-10-01 14:51:14 +0200
committerJens Axboe <jaxboe@fusionio.com>2010-10-01 14:51:14 +0200
commit3aad5d3ee4e4fce8f4b5bb6ca73342dcade42b33 (patch)
tree1ba65d361b6d77761f53769fc8891a56085422c6 /block
parentfe0714377ee2ca161bf2afb7773e22f15f1786d4 (diff)
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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>
Diffstat (limited to 'block')
-rw-r--r--block/blk-throttle.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 11713ed852f..a4670025571 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -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)