diff --git a/drivers/scsi/NCR53c406a.c b/drivers/scsi/NCR53c406a.c
index b2002ba..79ae73b 100644
--- a/drivers/scsi/NCR53c406a.c
+++ b/drivers/scsi/NCR53c406a.c
@@ -182,13 +182,13 @@
 static void *bios_base;
 #endif
 
-#if PORT_BASE
+#ifdef PORT_BASE
 static int port_base = PORT_BASE;
 #else
 static int port_base;
 #endif
 
-#if IRQ_LEV
+#ifdef IRQ_LEV
 static int irq_level = IRQ_LEV;
 #else
 static int irq_level = -1;	/* 0 is 'no irq', so use -1 for 'uninitialized' */
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 6466a18..329cb23 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -1505,7 +1505,7 @@
 	memset(recovery_cmd, 0, sizeof(struct scsi_cmnd));
 	recovery_cmd->device = cmd->device;
 	recovery_cmd->scsi_done = ahd_linux_dev_reset_complete;
-#if AHD_DEBUG
+#ifdef AHD_DEBUG
 	if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 		printf("%s:%d:%d:%d: Device reset called for cmd %p\n",
 		       ahd_name(ahd), cmd->device->channel, cmd->device->id,
diff --git a/drivers/scsi/aic7xxx/aic79xx_pci.c b/drivers/scsi/aic7xxx/aic79xx_pci.c
index 4c3bb7b..703f6e44 100644
--- a/drivers/scsi/aic7xxx/aic79xx_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_pci.c
@@ -582,7 +582,7 @@
 		}
 	}
 
-#if AHD_DEBUG
+#ifdef AHD_DEBUG
 	if (have_seeprom != 0
 	 && (ahd_debug & AHD_DUMP_SEEPROM) != 0) {
 		uint16_t *sc_data;
diff --git a/drivers/scsi/dpt/dptsig.h b/drivers/scsi/dpt/dptsig.h
index 95a4cce..4bf4477 100644
--- a/drivers/scsi/dpt/dptsig.h
+++ b/drivers/scsi/dpt/dptsig.h
@@ -76,7 +76,7 @@
 #endif  /* aix */
 #endif
 /* For the Macintosh */
-#if STRUCTALIGNMENTSUPPORTED
+#ifdef STRUCTALIGNMENTSUPPORTED
 #pragma options align=mac68k
 #endif
 
@@ -332,7 +332,7 @@
 #endif  /* aix */
 #endif
 /* For the Macintosh */
-#if STRUCTALIGNMENTSUPPORTED
+#ifdef STRUCTALIGNMENTSUPPORTED
 #pragma options align=reset
 #endif
 
diff --git a/drivers/scsi/dtc.c b/drivers/scsi/dtc.c
index ab9de39..897743b 100644
--- a/drivers/scsi/dtc.c
+++ b/drivers/scsi/dtc.c
@@ -92,10 +92,6 @@
 
 #define DTC_PUBLIC_RELEASE 2
 
-/*#define DTCDEBUG 0x1*/
-#define DTCDEBUG_INIT	0x1
-#define DTCDEBUG_TRANSFER 0x2
-
 /*
  * The DTC3180 & 3280 boards are memory mapped.
  * 
diff --git a/drivers/scsi/dtc.h b/drivers/scsi/dtc.h
index ed73629..277cd01 100644
--- a/drivers/scsi/dtc.h
+++ b/drivers/scsi/dtc.h
@@ -28,6 +28,10 @@
 #ifndef DTC3280_H
 #define DTC3280_H
 
+#define DTCDEBUG 0
+#define DTCDEBUG_INIT	0x1
+#define DTCDEBUG_TRANSFER 0x2
+
 static int dtc_abort(Scsi_Cmnd *);
 static int dtc_biosparam(struct scsi_device *, struct block_device *,
 		         sector_t, int*);
diff --git a/drivers/scsi/initio.c b/drivers/scsi/initio.c
index 2094d48..ea6f3c0 100644
--- a/drivers/scsi/initio.c
+++ b/drivers/scsi/initio.c
@@ -716,7 +716,7 @@
 	pCurHcb->HCS_SCSI_ID = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
 	pCurHcb->HCS_IdMask = ~(1 << pCurHcb->HCS_SCSI_ID);
 
-#if CHK_PARITY
+#ifdef CHK_PARITY
 	/* Enable parity error response */
 	TUL_WR(pCurHcb->HCS_Base + TUL_PCMD, TUL_RD(pCurHcb->HCS_Base, TUL_PCMD) | 0x40);
 #endif
diff --git a/drivers/scsi/lpfc/lpfc_compat.h b/drivers/scsi/lpfc/lpfc_compat.h
index 275ba34..a11f1ae 100644
--- a/drivers/scsi/lpfc/lpfc_compat.h
+++ b/drivers/scsi/lpfc/lpfc_compat.h
@@ -30,8 +30,9 @@
 However on a big-endian host, copy 4 bytes at a time,
 using writel() and readl().
  *******************************************************************/
+#include <asm/byteorder.h>
 
-#if __BIG_ENDIAN
+#ifdef __BIG_ENDIAN
 
 static inline void
 lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
diff --git a/drivers/scsi/lpfc/lpfc_scsi.h b/drivers/scsi/lpfc/lpfc_scsi.h
index d8fd201..0fd9ba1 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.h
+++ b/drivers/scsi/lpfc/lpfc_scsi.h
@@ -18,6 +18,8 @@
  * included with this package.                                     *
  *******************************************************************/
 
+#include <asm/byteorder.h>
+
 struct lpfc_hba;
 
 #define list_remove_head(list, entry, type, member)		\
@@ -81,7 +83,7 @@
 	/* # of bits to shift lun id to end up in right
 	 * payload word, little endian = 8, big = 16.
 	 */
-#if __BIG_ENDIAN
+#ifdef __BIG_ENDIAN
 #define FC_LUN_SHIFT         16
 #define FC_ADDR_MODE_SHIFT   24
 #else	/*  __LITTLE_ENDIAN */
diff --git a/drivers/scsi/pas16.c b/drivers/scsi/pas16.c
index 363e0eb..72bc947 100644
--- a/drivers/scsi/pas16.c
+++ b/drivers/scsi/pas16.c
@@ -2,6 +2,7 @@
 #define PSEUDO_DMA
 #define FOO
 #define UNSAFE  /* Not unsafe for PAS16 -- use it */
+#define PDEBUG 0
 
 /*
  * This driver adapted from Drew Eckhardt's Trantor T128 driver
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.h b/drivers/scsi/sym53c8xx_2/sym_hipd.h
index c55c7a5..3131a6b 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.h
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.h
@@ -151,6 +151,16 @@
  */
 #define	SYM_CONF_MIN_ASYNC (40)
 
+
+/*
+ * MEMORY ALLOCATOR.
+ */
+
+#define SYM_MEM_WARN	1	/* Warn on failed operations */
+
+#define SYM_MEM_PAGE_ORDER 0	/* 1 PAGE  maximum */
+#define SYM_MEM_CLUSTER_SHIFT	(PAGE_SHIFT+SYM_MEM_PAGE_ORDER)
+#define SYM_MEM_FREE_UNUSED	/* Free unused pages immediately */
 /*
  *  Shortest memory chunk is (1<<SYM_MEM_SHIFT), currently 16.
  *  Actual allocations happen as SYM_MEM_CLUSTER_SIZE sized.
@@ -1192,12 +1202,6 @@
  *  MEMORY ALLOCATOR.
  */
 
-#define SYM_MEM_PAGE_ORDER 0	/* 1 PAGE  maximum */
-#define SYM_MEM_CLUSTER_SHIFT	(PAGE_SHIFT+SYM_MEM_PAGE_ORDER)
-#define SYM_MEM_FREE_UNUSED	/* Free unused pages immediately */
-
-#define SYM_MEM_WARN	1	/* Warn on failed operations */
-
 #define sym_get_mem_cluster()	\
 	(void *) __get_free_pages(GFP_ATOMIC, SYM_MEM_PAGE_ORDER)
 #define sym_free_mem_cluster(p)	\
diff --git a/drivers/scsi/sym53c8xx_2/sym_nvram.c b/drivers/scsi/sym53c8xx_2/sym_nvram.c
index cd9140e15..994b756 100644
--- a/drivers/scsi/sym53c8xx_2/sym_nvram.c
+++ b/drivers/scsi/sym53c8xx_2/sym_nvram.c
@@ -367,7 +367,7 @@
 	S24C16_write_ack(np, ack_data, gpreg, gpcntl);
 }
 
-#if SYM_CONF_NVRAM_WRITE_SUPPORT
+#ifdef SYM_CONF_NVRAM_WRITE_SUPPORT
 /*
  *  Write 'len' bytes starting at 'offset'.
  */
diff --git a/drivers/scsi/t128.h b/drivers/scsi/t128.h
index 9ad1d68..596f3a3 100644
--- a/drivers/scsi/t128.h
+++ b/drivers/scsi/t128.h
@@ -43,6 +43,7 @@
 
 #define T128_PUBLIC_RELEASE 3
 
+#define TDEBUG		0
 #define TDEBUG_INIT	0x1
 #define TDEBUG_TRANSFER 0x2