diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page-writeback.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 325f753c80ed..0802d5177997 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -618,8 +618,8 @@ static unsigned long bdi_position_ratio(struct backing_dev_info *bdi, x_intercept = bdi_setpoint + span; if (bdi_dirty < x_intercept - span / 4) { - pos_ratio *= x_intercept - bdi_dirty; - do_div(pos_ratio, x_intercept - bdi_setpoint + 1); + pos_ratio = div_u64(pos_ratio * (x_intercept - bdi_dirty), + x_intercept - bdi_setpoint + 1); } else pos_ratio /= 4; @@ -630,10 +630,9 @@ static unsigned long bdi_position_ratio(struct backing_dev_info *bdi, */ x_intercept = bdi_thresh / 2; if (bdi_dirty < x_intercept) { - if (bdi_dirty > x_intercept / 8) { - pos_ratio *= x_intercept; - do_div(pos_ratio, bdi_dirty); - } else + if (bdi_dirty > x_intercept / 8) + pos_ratio = div_u64(pos_ratio * x_intercept, bdi_dirty); + else pos_ratio *= 8; } @@ -1010,10 +1009,10 @@ static void balance_dirty_pages(struct address_space *mapping, unsigned long dirty_thresh; unsigned long bdi_thresh; long pause = 0; - long max_pause; + long uninitialized_var(max_pause); bool dirty_exceeded = false; unsigned long task_ratelimit; - unsigned long dirty_ratelimit; + unsigned long uninitialized_var(dirty_ratelimit); unsigned long pos_ratio; struct backing_dev_info *bdi = mapping->backing_dev_info; unsigned long start_time = jiffies; |