diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index 5908deae960..1f7d65f29e7 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -814,7 +814,7 @@ void __init setup_arch(char **cmdline_p)
 	 * - by now the stack is part of the init task */
 	printk("Memory %08lx-%08lx\n", memory_start, memory_end);
 
-	if (memory_start == memory_end) BUG();
+	BUG_ON(memory_start == memory_end);
 
 	init_mm.start_code = (unsigned long) &_stext;
 	init_mm.end_code = (unsigned long) &_etext;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index abb83d95df5..6de3cd3d6e8 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1725,8 +1725,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 		}
 	}
 
-	if (HWGROUP(drive)->handler != NULL)
-		BUG();
+	BUG_ON(HWGROUP(drive)->handler != NULL);
 
 	ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL);
 	return ide_started;
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index c481be8b807..783a2475ee8 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -206,8 +206,7 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 	ide_hwif_t *hwif = HWIF(drive);
 	struct scatterlist *sg = hwif->sg_table;
 
-	if ((rq->flags & REQ_DRIVE_TASKFILE) && rq->nr_sectors > 256)
-		BUG();
+	BUG_ON((rq->flags & REQ_DRIVE_TASKFILE) && rq->nr_sectors > 256);
 
 	ide_map_sg(drive, rq);
 
@@ -947,8 +946,7 @@ void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_p
 	}
 	printk("\n");
 
-	if (!(hwif->dma_master))
-		BUG();
+	BUG_ON(!hwif->dma_master);
 }
 
 EXPORT_SYMBOL_GPL(ide_setup_dma);
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index a53e3ce4a14..a1179e92496 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -898,8 +898,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 					"to send us more data than expected "
 					"- discarding data\n");
 				idefloppy_discard_data(drive,bcount.all);
-				if (HWGROUP(drive)->handler != NULL)
-					BUG();
+				BUG_ON(HWGROUP(drive)->handler != NULL);
 				ide_set_handler(drive,
 						&idefloppy_pc_intr,
 						IDEFLOPPY_WAIT_CMD,
@@ -932,8 +931,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	pc->actually_transferred += bcount.all;
 	pc->current_position += bcount.all;
 
-	if (HWGROUP(drive)->handler != NULL)
-		BUG();
+	BUG_ON(HWGROUP(drive)->handler != NULL);
 	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);		/* And set the interrupt handler again */
 	return ide_started;
 }
@@ -960,8 +958,7 @@ static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 				"issuing a packet command\n");
 		return ide_do_reset(drive);
 	}
-	if (HWGROUP(drive)->handler != NULL)
-		BUG();
+	BUG_ON(HWGROUP(drive)->handler != NULL);
 	/* Set the interrupt routine */
 	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 	/* Send the actual packet */
@@ -1017,8 +1014,7 @@ static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 	 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 	 * used until after the packet is moved in about 50 msec.
 	 */
-	if (HWGROUP(drive)->handler != NULL)
-		BUG();
+	BUG_ON(HWGROUP(drive)->handler != NULL);
 	ide_set_handler(drive, 
 	  &idefloppy_pc_intr, 		/* service routine for packet command */
 	  floppy->ticks,		/* wait this long before "failing" */
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index b72dde70840..97a49e77a8f 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -939,8 +939,7 @@ void ide_execute_command(ide_drive_t *drive, task_ioreg_t cmd, ide_handler_t *ha
 	
 	spin_lock_irqsave(&ide_lock, flags);
 	
-	if(hwgroup->handler)
-		BUG();
+	BUG_ON(hwgroup->handler);
 	hwgroup->handler	= handler;
 	hwgroup->expiry		= expiry;
 	hwgroup->timer.expires	= jiffies + timeout;
@@ -981,8 +980,7 @@ static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
 		printk("%s: ATAPI reset complete\n", drive->name);
 	} else {
 		if (time_before(jiffies, hwgroup->poll_timeout)) {
-			if (HWGROUP(drive)->handler != NULL)
-				BUG();
+			BUG_ON(HWGROUP(drive)->handler != NULL);
 			ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
 			/* continue polling */
 			return ide_started;
@@ -1021,8 +1019,7 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
 
 	if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
 		if (time_before(jiffies, hwgroup->poll_timeout)) {
-			if (HWGROUP(drive)->handler != NULL)
-				BUG();
+			BUG_ON(HWGROUP(drive)->handler != NULL);
 			ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
 			/* continue polling */
 			return ide_started;
@@ -1138,8 +1135,7 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
 	hwgroup = HWGROUP(drive);
 
 	/* We must not reset with running handlers */
-	if(hwgroup->handler != NULL)
-		BUG();
+	BUG_ON(hwgroup->handler != NULL);
 
 	/* For an ATAPI device, first try an ATAPI SRST. */
 	if (drive->media != ide_disk && !do_not_try_atapi) {
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index 41d46dbe6c2..16a143133f9 100644
--- a/drivers/ide/ide-lib.c
+++ b/drivers/ide/ide-lib.c
@@ -164,8 +164,7 @@ u8 ide_rate_filter (u8 mode, u8 speed)
 //	printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
 
 	/* So that we remember to update this if new modes appear */
-	if (mode > 4)
-		BUG();
+	BUG_ON(mode > 4);
 	return min(speed, speed_max[mode]);
 #else /* !CONFIG_BLK_DEV_IDEDMA */
 	return min(speed, (u8)XFER_PIO_4);
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 9233b8109a0..a839b2a8f6f 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -196,8 +196,7 @@ ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 	if (stat & (ERR_STAT|DRQ_STAT))
 		return ide_error(drive, "set_geometry_intr", stat);
 
-	if (HWGROUP(drive)->handler != NULL)
-		BUG();
+	BUG_ON(HWGROUP(drive)->handler != NULL);
 	ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 	return ide_started;
 }
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index f5a60912c27..9799aed772e 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -1367,8 +1367,7 @@ int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device
 
 			ide_abort(drive, "drive reset");
 
-			if(HWGROUP(drive)->handler)
-				BUG();
+			BUG_ON(HWGROUP(drive)->handler);
 				
 			/* Ensure nothing gets queued after we
 			   drop the lock. Reset will clear the busy */
diff --git a/drivers/ide/pci/trm290.c b/drivers/ide/pci/trm290.c
index c26c8ca90dd..fe80295974e 100644
--- a/drivers/ide/pci/trm290.c
+++ b/drivers/ide/pci/trm290.c
@@ -183,8 +183,7 @@ static void trm290_ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
 
-	if (HWGROUP(drive)->handler != NULL)	/* paranoia check */
-		BUG();
+	BUG_ON(HWGROUP(drive)->handler != NULL);	/* paranoia check */
 	ide_set_handler(drive, &ide_dma_intr, WAIT_CMD, NULL);
 	/* issue cmd to drive */
 	hwif->OUTB(command, IDE_COMMAND_REG);
diff --git a/drivers/scsi/53c700.h b/drivers/scsi/53c700.h
index d8041952b1b..7f22a06fe5e 100644
--- a/drivers/scsi/53c700.h
+++ b/drivers/scsi/53c700.h
@@ -474,8 +474,7 @@ NCR_700_readl(struct Scsi_Host *host, __u32 reg)
 		ioread32(hostdata->base + reg);
 #if 1
 	/* sanity check the register */
-	if((reg & 0x3) != 0)
-		BUG();
+	BUG_ON((reg & 0x3) != 0);
 #endif
 
 	return value;
@@ -498,8 +497,7 @@ NCR_700_writel(__u32 value, struct Scsi_Host *host, __u32 reg)
 
 #if 1
 	/* sanity check the register */
-	if((reg & 0x3) != 0)
-		BUG();
+	BUG_ON((reg & 0x3) != 0);
 #endif
 
 	bEBus ? iowrite32be(value, hostdata->base + reg): 
diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index ea9e038813e..83b5c7d085f 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -396,8 +396,7 @@ static void get_container_name_callback(void *context, struct fib * fibptr)
 	scsicmd->SCp.phase = AAC_OWNER_MIDLEVEL;
 
 	dprintk((KERN_DEBUG "get_container_name_callback[cpu %d]: t = %ld.\n", smp_processor_id(), jiffies));
-	if (fibptr == NULL)
-		BUG();
+	BUG_ON(fibptr == NULL);
 
 	get_name_reply = (struct aac_get_name_resp *) fib_data(fibptr);
 	/* Failure is irrelevant, using default value instead */
@@ -956,8 +955,7 @@ static void io_callback(void *context, struct fib * fibptr)
 		  smp_processor_id(), (unsigned long long)lba, jiffies);
 	}
 
-	if (fibptr == NULL)
-		BUG();
+	BUG_ON(fibptr == NULL);
 		
 	if(scsicmd->use_sg)
 		pci_unmap_sg(dev->pdev, 
@@ -1092,8 +1090,7 @@ static int aac_read(struct scsi_cmnd * scsicmd, int cid)
 		
 		aac_build_sgraw(scsicmd, &readcmd->sg);
 		fibsize = sizeof(struct aac_raw_io) + ((le32_to_cpu(readcmd->sg.count) - 1) * sizeof (struct sgentryraw));
-		if (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))
-			BUG();
+		BUG_ON(fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)));
 		/*
 		 *	Now send the Fib to the adapter
 		 */
@@ -1261,8 +1258,7 @@ static int aac_write(struct scsi_cmnd * scsicmd, int cid)
 		
 		aac_build_sgraw(scsicmd, &writecmd->sg);
 		fibsize = sizeof(struct aac_raw_io) + ((le32_to_cpu(writecmd->sg.count) - 1) * sizeof (struct sgentryraw));
-		if (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))
-			BUG();
+		BUG_ON(fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)));
 		/*
 		 *	Now send the Fib to the adapter
 		 */
@@ -1904,8 +1900,7 @@ static void aac_srb_callback(void *context, struct fib * fibptr)
 	scsicmd->SCp.phase = AAC_OWNER_MIDLEVEL;
 	dev = (struct aac_dev *)scsicmd->device->host->hostdata;
 
-	if (fibptr == NULL)
-		BUG();
+	BUG_ON(fibptr == NULL);
 
 	srbreply = (struct aac_srb_reply *) fib_data(fibptr);
 
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index d2ef17ea44f..3f27419c66a 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -229,8 +229,7 @@ void aac_fib_init(struct fib *fibptr)
 static void fib_dealloc(struct fib * fibptr)
 {
 	struct hw_fib *hw_fib = fibptr->hw_fib;
-	if(hw_fib->header.StructType != FIB_MAGIC) 
-		BUG();
+	BUG_ON(hw_fib->header.StructType != FIB_MAGIC);
 	hw_fib->header.XferState = 0;        
 }
 
@@ -530,8 +529,7 @@ int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
 			}
 		} else
 			down(&fibptr->event_wait);
-		if(fibptr->done == 0)
-			BUG();
+		BUG_ON(fibptr->done == 0);
 			
 		if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
 			return -ETIMEDOUT;
diff --git a/drivers/scsi/arm/queue.c b/drivers/scsi/arm/queue.c
index b10750bb5c0..8caa5903ce3 100644
--- a/drivers/scsi/arm/queue.c
+++ b/drivers/scsi/arm/queue.c
@@ -118,8 +118,7 @@ int __queue_add(Queue_t *queue, Scsi_Cmnd *SCpnt, int head)
 	list_del(l);
 
 	q = list_entry(l, QE_t, list);
-	if (BAD_MAGIC(q, QUEUE_MAGIC_FREE))
-		BUG();
+	BUG_ON(BAD_MAGIC(q, QUEUE_MAGIC_FREE));
 
 	SET_MAGIC(q, QUEUE_MAGIC_USED);
 	q->SCpnt = SCpnt;
@@ -144,8 +143,7 @@ static Scsi_Cmnd *__queue_remove(Queue_t *queue, struct list_head *ent)
 	 */
 	list_del(ent);
 	q = list_entry(ent, QE_t, list);
-	if (BAD_MAGIC(q, QUEUE_MAGIC_USED))
-		BUG();
+	BUG_ON(BAD_MAGIC(q, QUEUE_MAGIC_USED));
 
 	SET_MAGIC(q, QUEUE_MAGIC_FREE);
 	list_add(ent, &queue->free);
diff --git a/drivers/scsi/ibmmca.c b/drivers/scsi/ibmmca.c
index 0c6dc31bb14..115f55471ed 100644
--- a/drivers/scsi/ibmmca.c
+++ b/drivers/scsi/ibmmca.c
@@ -2241,8 +2241,7 @@ static int __ibmmca_host_reset(Scsi_Cmnd * cmd)
 	int host_index;
 	unsigned long imm_command;
 
-	if (cmd == NULL)
-		BUG();
+	BUG_ON(cmd == NULL);
 
 	ticks = IM_RESET_DELAY * HZ;
 	shpnt = cmd->device->host;
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 39b760a2424..988e6f7af01 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -600,8 +600,7 @@ static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
 				"issuing a packet command\n");
 		return ide_do_reset (drive);
 	}
-	if (HWGROUP(drive)->handler != NULL)
-		BUG();
+	BUG_ON(HWGROUP(drive)->handler != NULL);
 	/* Set the interrupt routine */
 	ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
 	/* Send the actual packet */
@@ -691,8 +690,7 @@ static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc)
 		set_bit(PC_DMA_OK, &pc->flags);
 
 	if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) {
-		if (HWGROUP(drive)->handler != NULL)
-			BUG();
+		BUG_ON(HWGROUP(drive)->handler != NULL);
 		ide_set_handler(drive, &idescsi_transfer_pc,
 				get_timeout(pc), idescsi_expiry);
 		/* Issue the packet command */
diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index c33857e7b33..5d2cefb5e52 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -1828,7 +1828,7 @@ mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
 
 	scb->dma_type = MEGA_SGLIST;
 
-	if( sgcnt > adapter->sglen ) BUG();
+	BUG_ON(sgcnt > adapter->sglen);
 
 	*len = 0;
 
diff --git a/kernel/exit.c b/kernel/exit.c
index e06d0c10a24..a3baf92462b 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -579,7 +579,7 @@ static void exit_mm(struct task_struct * tsk)
 		down_read(&mm->mmap_sem);
 	}
 	atomic_inc(&mm->mm_count);
-	if (mm != tsk->active_mm) BUG();
+	BUG_ON(mm != tsk->active_mm);
 	/* more a memory barrier than a real lock */
 	task_lock(tsk);
 	tsk->mm = NULL;
@@ -1530,8 +1530,7 @@ check_continued:
 		if (options & __WNOTHREAD)
 			break;
 		tsk = next_thread(tsk);
-		if (tsk->signal != current->signal)
-			BUG();
+		BUG_ON(tsk->signal != current->signal);
 	} while (tsk != current);
 
 	read_unlock(&tasklist_lock);
diff --git a/mm/pdflush.c b/mm/pdflush.c
index c4b6d0afd73..df7e50b8f70 100644
--- a/mm/pdflush.c
+++ b/mm/pdflush.c
@@ -202,8 +202,7 @@ int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0)
 	unsigned long flags;
 	int ret = 0;
 
-	if (fn == NULL)
-		BUG();		/* Hard to diagnose if it's deferred */
+	BUG_ON(fn == NULL);	/* Hard to diagnose if it's deferred */
 
 	spin_lock_irqsave(&pdflush_lock, flags);
 	if (list_empty(&pdflush_list)) {