ide: use DIV_ROUND_UP

The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /
(d)) but is perhaps more readable.

An extract of the semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@haskernel@
@@

#include <linux/kernel.h>

@depends on haskernel@
expression n,d;
@@

(
- (n + d - 1) / d
+ DIV_ROUND_UP(n,d)
|
- (n + (d - 1)) / d
+ DIV_ROUND_UP(n,d)
)

@depends on haskernel@
expression n,d;
@@

- DIV_ROUND_UP((n),d)
+ DIV_ROUND_UP(n,d)

@depends on haskernel@
expression n,d;
@@

- DIV_ROUND_UP(n,(d))
+ DIV_ROUND_UP(n,d)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/ide/pci/cmd640.c b/drivers/ide/pci/cmd640.c
index fed93417d54a..662099a98a72 100644
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -561,15 +561,15 @@ static void cmd640_set_mode(ide_drive_t *drive, unsigned int index,
         active_time = ide_pio_timings[pio_mode].active_time;
         recovery_time = cycle_time - (setup_time + active_time);
         clock_time = 1000 / bus_speed;
-        cycle_count = (cycle_time + clock_time - 1) / clock_time;
+        cycle_count = DIV_ROUND_UP(cycle_time, clock_time);
 
-        setup_count = (setup_time + clock_time - 1) / clock_time;
+        setup_count = DIV_ROUND_UP(setup_time, clock_time);
 
-        active_count = (active_time + clock_time - 1) / clock_time;
+        active_count = DIV_ROUND_UP(active_time, clock_time);
         if (active_count < 2)
                 active_count = 2; /* minimum allowed by cmd640 */
 
-        recovery_count = (recovery_time + clock_time - 1) / clock_time;
+        recovery_count = DIV_ROUND_UP(recovery_time, clock_time);
         recovery_count2 = cycle_count - (setup_count + active_count);
         if (recovery_count2 > recovery_count)
                 recovery_count = recovery_count2;