[PATCH] drivers/block/*: use time_after() and friends

They deal with wrapping correctly and are nicer to read.

Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 14 insertions, 12 deletions

diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 49c7cd558ddf..45bcda544880 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -41,6 +41,7 @@
 #include <linux/timer.h>
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/jiffies.h>
 #include <linux/random.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -3654,8 +3655,8 @@ static void DAC960_V1_ProcessCompletedCommand(DAC960_Command_T *Command)
               (NewEnquiry->EventLogSequenceNumber !=
                OldEnquiry->EventLogSequenceNumber) ||
               Controller->MonitoringTimerCount == 0 ||
-              (jiffies - Controller->SecondaryMonitoringTime
-               >= DAC960_SecondaryMonitoringInterval))
+              time_after_eq(jiffies, Controller->SecondaryMonitoringTime
+               + DAC960_SecondaryMonitoringInterval))
             {
               Controller->V1.NeedLogicalDriveInformation = true;
               Controller->V1.NewEventLogSequenceNumber =
@@ -5640,8 +5641,8 @@ static void DAC960_MonitoringTimerFunction(unsigned long TimerData)
       unsigned int StatusChangeCounter =
         Controller->V2.HealthStatusBuffer->StatusChangeCounter;
       boolean ForceMonitoringCommand = false;
-      if (jiffies - Controller->SecondaryMonitoringTime
-          > DAC960_SecondaryMonitoringInterval)
+      if (time_after(jiffies, Controller->SecondaryMonitoringTime
+          + DAC960_SecondaryMonitoringInterval))
         {
           int LogicalDriveNumber;
           for (LogicalDriveNumber = 0;
@@ -5669,8 +5670,8 @@ static void DAC960_MonitoringTimerFunction(unsigned long TimerData)
            ControllerInfo->ConsistencyChecksActive +
            ControllerInfo->RebuildsActive +
            ControllerInfo->OnlineExpansionsActive == 0 ||
-           jiffies - Controller->PrimaryMonitoringTime
-           < DAC960_MonitoringTimerInterval) &&
+           time_before(jiffies, Controller->PrimaryMonitoringTime
+           + DAC960_MonitoringTimerInterval)) &&
           !ForceMonitoringCommand)
         {
           Controller->MonitoringTimer.expires =
@@ -5807,8 +5808,8 @@ static void DAC960_Message(DAC960_MessageLevel_T MessageLevel,
       Controller->ProgressBufferLength = Length;
       if (Controller->EphemeralProgressMessage)
         {
-          if (jiffies - Controller->LastProgressReportTime
-              >= DAC960_ProgressReportingInterval)
+          if (time_after_eq(jiffies, Controller->LastProgressReportTime
+              + DAC960_ProgressReportingInterval))
             {
               printk("%sDAC960#%d: %s", DAC960_MessageLevelMap[MessageLevel],
                      Controller->ControllerNumber, Buffer);
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index d3ad9081697e..bedb689b051f 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -170,6 +170,7 @@ static int print_unex = 1;
 #include <linux/mm.h>
 #include <linux/bio.h>
 #include <linux/string.h>
+#include <linux/jiffies.h>
 #include <linux/fcntl.h>
 #include <linux/delay.h>
 #include <linux/mc146818rtc.h>  /* CMOS defines */
@@ -747,7 +748,7 @@ static int disk_change(int drive)
 {
         int fdc = FDC(drive);
 #ifdef FLOPPY_SANITY_CHECK
-        if (jiffies - UDRS->select_date < UDP->select_delay)
+        if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
                 DPRINT("WARNING disk change called early\n");
         if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
             (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
@@ -1075,7 +1076,7 @@ static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
                 return 1;
         }
 
-        if ((signed)(jiffies - delay) < 0) {
+        if (time_before(jiffies, delay)) {
                 del_timer(&fd_timer);
                 fd_timer.function = function;
                 fd_timer.expires = delay;
@@ -1535,7 +1536,7 @@ static void setup_rw_floppy(void)
                  * again just before spinup completion. Beware that
                  * after scandrives, we must again wait for selection.
                  */
-                if ((signed)(ready_date - jiffies) > DP->select_delay) {
+                if (time_after(ready_date, jiffies + DP->select_delay)) {
                         ready_date -= DP->select_delay;
                         function = (timeout_fn) floppy_start;
                 } else
@@ -3823,7 +3824,7 @@ static int check_floppy_change(struct gendisk *disk)
         if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
                 return 1;
 
-        if (UDP->checkfreq < (int)(jiffies - UDRS->last_checked)) {
+        if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
                 if (floppy_grab_irq_and_dma()) {
                         return 1;
                 }