patch-2.1.87 linux/kernel/time.c

• Lines: 159
• Date: Thu Feb 12 16:44:15 1998
• Orig file: v2.1.86/linux/kernel/time.c
• Orig date: Mon Dec 8 23:58:05 1997

diff -u --recursive --new-file v2.1.86/linux/kernel/time.c linux/kernel/time.c
@@ -216,32 +216,24 @@
 /* adjtimex mainly allows reading (and writing, if superuser) of
  * kernel time-keeping variables. used by xntpd.
  */
-asmlinkage int sys_adjtimex(struct timex *txc_p)
+int do_adjtimex(struct timex *txc)
 {
         long ltemp, mtemp, save_adjust;
-	struct timex txc;		/* Local copy of parameter */
-
-	/* Copy the user data space into the kernel copy
-	 * structure. But bear in mind that the structures
-	 * may change
-	 */
-	if(copy_from_user(&txc, txc_p, sizeof(struct timex)))
-		return -EFAULT;
 
 	/* In order to modify anything, you gotta be super-user! */
-	if (txc.modes && !suser())
+	if (txc->modes && !suser())
 		return -EPERM;
 		
 	/* Now we validate the data before disabling interrupts */
 
-	if (txc.modes != ADJ_OFFSET_SINGLESHOT && (txc.modes & ADJ_OFFSET))
+	if (txc->modes != ADJ_OFFSET_SINGLESHOT && (txc->modes & ADJ_OFFSET))
 	  /* adjustment Offset limited to +- .512 seconds */
-		if (txc.offset <= - MAXPHASE || txc.offset >= MAXPHASE )
+		if (txc->offset <= - MAXPHASE || txc->offset >= MAXPHASE )
 			return -EINVAL;	
 
 	/* if the quartz is off by more than 10% something is VERY wrong ! */
-	if (txc.modes & ADJ_TICK)
-		if (txc.tick < 900000/HZ || txc.tick > 1100000/HZ)
+	if (txc->modes & ADJ_TICK)
+		if (txc->tick < 900000/HZ || txc->tick > 1100000/HZ)
 			return -EINVAL;
 
 	cli(); /* SMP: global cli() is enough protection. */
@@ -250,37 +242,37 @@
 	save_adjust = time_adjust;
 
 	/* If there are input parameters, then process them */
-	if (txc.modes)
+	if (txc->modes)
 	{
 	    if (time_state == TIME_BAD)
 		time_state = TIME_OK;
 
-	    if (txc.modes & ADJ_STATUS)
-		time_status = txc.status;
+	    if (txc->modes & ADJ_STATUS)
+		time_status = txc->status;
 
-	    if (txc.modes & ADJ_FREQUENCY)
-		time_freq = txc.freq;
+	    if (txc->modes & ADJ_FREQUENCY)
+		time_freq = txc->freq;
 
-	    if (txc.modes & ADJ_MAXERROR)
-		time_maxerror = txc.maxerror;
+	    if (txc->modes & ADJ_MAXERROR)
+		time_maxerror = txc->maxerror;
 
-	    if (txc.modes & ADJ_ESTERROR)
-		time_esterror = txc.esterror;
+	    if (txc->modes & ADJ_ESTERROR)
+		time_esterror = txc->esterror;
 
-	    if (txc.modes & ADJ_TIMECONST)
-		time_constant = txc.constant;
+	    if (txc->modes & ADJ_TIMECONST)
+		time_constant = txc->constant;
 
-	    if (txc.modes & ADJ_OFFSET)
-	      if ((txc.modes == ADJ_OFFSET_SINGLESHOT)
+	    if (txc->modes & ADJ_OFFSET)
+	      if ((txc->modes == ADJ_OFFSET_SINGLESHOT)
 		  || !(time_status & STA_PLL))
 		{
-		  time_adjust = txc.offset;
+		  time_adjust = txc->offset;
 		}
 	      else if ((time_status & STA_PLL)||(time_status & STA_PPSTIME))
 		{
 		  ltemp = (time_status & STA_PPSTIME &&
 			   time_status & STA_PPSSIGNAL) ?
-		    pps_offset : txc.offset;
+		    pps_offset : txc->offset;
 
 		  /*
 		   * Scale the phase adjustment and
@@ -335,30 +327,46 @@
 		  else if (time_freq < -time_tolerance)
 		    time_freq = -time_tolerance;
 		} /* STA_PLL || STA_PPSTIME */
-	    if (txc.modes & ADJ_TICK)
-	      tick = txc.tick;
+	    if (txc->modes & ADJ_TICK)
+	      tick = txc->tick;
 
 	}
-	txc.offset	   = save_adjust;
-	txc.freq	   = time_freq;
-	txc.maxerror	   = time_maxerror;
-	txc.esterror	   = time_esterror;
-	txc.status	   = time_status;
-	txc.constant	   = time_constant;
-	txc.precision	   = time_precision;
-	txc.tolerance	   = time_tolerance;
-	txc.time	   = xtime;
-	txc.tick	   = tick;
-	txc.ppsfreq	   = pps_freq;
-	txc.jitter	   = pps_jitter;
-	txc.shift	   = pps_shift;
-	txc.stabil	   = pps_stabil;
-	txc.jitcnt	   = pps_jitcnt;
-	txc.calcnt	   = pps_calcnt;
-	txc.errcnt	   = pps_errcnt;
-	txc.stbcnt	   = pps_stbcnt;
+	txc->offset	   = save_adjust;
+	txc->freq	   = time_freq;
+	txc->maxerror	   = time_maxerror;
+	txc->esterror	   = time_esterror;
+	txc->status	   = time_status;
+	txc->constant	   = time_constant;
+	txc->precision	   = time_precision;
+	txc->tolerance	   = time_tolerance;
+	txc->time	   = xtime;
+	txc->tick	   = tick;
+	txc->ppsfreq	   = pps_freq;
+	txc->jitter	   = pps_jitter;
+	txc->shift	   = pps_shift;
+	txc->stabil	   = pps_stabil;
+	txc->jitcnt	   = pps_jitcnt;
+	txc->calcnt	   = pps_calcnt;
+	txc->errcnt	   = pps_errcnt;
+	txc->stbcnt	   = pps_stbcnt;
 
 	sti();
+	return 0;
+}
+
+asmlinkage int sys_adjtimex(struct timex *txc_p)
+{
+	struct timex txc;		/* Local copy of parameter */
+	int ret;
+
+	/* Copy the user data space into the kernel copy
+	 * structure. But bear in mind that the structures
+	 * may change
+	 */
+	if(copy_from_user(&txc, txc_p, sizeof(struct timex)))
+		return -EFAULT;
+	if ((ret = do_adjtimex(&txc)))
+	  return ret;
 
 	return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : time_state;
 }