Staging: comedi: make use of ARRAY_SIZE macro

Replace instances of computing number of elements in an array with
sizeof(foo)/sizeof(struct footype) with the ARRAY_SIZE macro.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

40 files changed, 43 insertions, 67 deletions

diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index cabbf090f60b..e5185ac3604c 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -853,7 +853,8 @@ int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name)
 	/*  pci slot */
 	options[1] = PCI_SLOT(pcidev->devfn);
 
-	return comedi_auto_config(&pcidev->dev, board_name, options, sizeof(options) / sizeof(options[0]));
+	return comedi_auto_config(&pcidev->dev, board_name,
+				  options, ARRAY_SIZE(options));
 }
 
 void comedi_pci_auto_unconfig(struct pci_dev *pcidev)
diff --git a/drivers/staging/comedi/drivers/adl_pci6208.c b/drivers/staging/comedi/drivers/adl_pci6208.c
index 7cd6043ed49f..b4807fc7eb01 100644
--- a/drivers/staging/comedi/drivers/adl_pci6208.c
+++ b/drivers/staging/comedi/drivers/adl_pci6208.c
@@ -110,9 +110,6 @@ struct pci6208_private {
 static int pci6208_attach(struct comedi_device *dev, struct comedi_devconfig *it);
 static int pci6208_detach(struct comedi_device *dev);
 
-#define pci6208_board_nbr \
-	(sizeof(pci6208_boards) / sizeof(struct pci6208_board))
-
 static struct comedi_driver driver_pci6208 = {
 	.driver_name = PCI6208_DRIVER_NAME,
 	.module = THIS_MODULE,
@@ -315,7 +312,7 @@ static int pci6208_find_device(struct comedi_device *dev, int bus, int slot)
 		pci_dev != NULL;
 		pci_dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) {
 		if (pci_dev->vendor == PCI_VENDOR_ID_ADLINK) {
-			for (i = 0; i < pci6208_board_nbr; i++) {
+			for (i = 0; i < ARRAY_SIZE(pci6208_boards); i++) {
 				if (pci6208_boards[i].dev_id == pci_dev->device) {
 					/*  was a particular bus/slot requested? */
 					if ((bus != 0) || (slot != 0)) {
diff --git a/drivers/staging/comedi/drivers/adq12b.c b/drivers/staging/comedi/drivers/adq12b.c
index 54724653a792..c51e9ba58808 100644
--- a/drivers/staging/comedi/drivers/adq12b.c
+++ b/drivers/staging/comedi/drivers/adq12b.c
@@ -171,7 +171,7 @@ static struct comedi_driver driver_adq12b={
         detach:         adq12b_detach,
         board_name:     &adq12b_boards[0].name,
         offset:         sizeof(struct adq12b_board),
-        num_names:      sizeof(adq12b_boards) / sizeof(struct adq12b_board),
+        num_names:      ARRAY_SIZE(adq12b_boards),
 };
 
 static int adq12b_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data);
diff --git a/drivers/staging/comedi/drivers/aio_iiro_16.c b/drivers/staging/comedi/drivers/aio_iiro_16.c
index 764cac2fd7d2..d062f8619b6e 100644
--- a/drivers/staging/comedi/drivers/aio_iiro_16.c
+++ b/drivers/staging/comedi/drivers/aio_iiro_16.c
@@ -78,7 +78,7 @@ static struct comedi_driver driver_aio_iiro_16 = {
 	.detach = aio_iiro_16_detach,
 	.board_name = &aio_iiro_16_boards[0].name,
 	.offset = sizeof(struct aio_iiro_16_board),
-	.num_names = sizeof(aio_iiro_16_boards) / sizeof(struct aio_iiro_16_board),
+	.num_names = ARRAY_SIZE(aio_iiro_16_boards),
 };
 
 static int aio_iiro_16_dio_insn_bits_read(struct comedi_device *dev,
diff --git a/drivers/staging/comedi/drivers/amplc_dio200.c b/drivers/staging/comedi/drivers/amplc_dio200.c
index 582d6a2cfef6..ddf58d4866eb 100644
--- a/drivers/staging/comedi/drivers/amplc_dio200.c
+++ b/drivers/staging/comedi/drivers/amplc_dio200.c
@@ -484,7 +484,7 @@ static struct comedi_driver driver_amplc_dio200 = {
 	.detach = dio200_detach,
 	.board_name = &dio200_boards[0].name,
 	.offset = sizeof(struct dio200_board),
-	.num_names = sizeof(dio200_boards) / sizeof(struct dio200_board),
+	.num_names = ARRAY_SIZE(dio200_boards),
 };
 
 #ifdef CONFIG_COMEDI_PCI
diff --git a/drivers/staging/comedi/drivers/amplc_pc236.c b/drivers/staging/comedi/drivers/amplc_pc236.c
index 3befe507ce2f..235cbfffa14b 100644
--- a/drivers/staging/comedi/drivers/amplc_pc236.c
+++ b/drivers/staging/comedi/drivers/amplc_pc236.c
@@ -176,7 +176,7 @@ static struct comedi_driver driver_amplc_pc236 = {
 	.detach = pc236_detach,
 	.board_name = &pc236_boards[0].name,
 	.offset = sizeof(struct pc236_board),
-	.num_names = sizeof(pc236_boards) / sizeof(struct pc236_board),
+	.num_names = ARRAY_SIZE(pc236_boards),
 };
 
 #ifdef CONFIG_COMEDI_PCI
diff --git a/drivers/staging/comedi/drivers/amplc_pc263.c b/drivers/staging/comedi/drivers/amplc_pc263.c
index 1d516b1f1591..c804c7c649c1 100644
--- a/drivers/staging/comedi/drivers/amplc_pc263.c
+++ b/drivers/staging/comedi/drivers/amplc_pc263.c
@@ -141,7 +141,7 @@ static struct comedi_driver driver_amplc_pc263 = {
 	.detach = pc263_detach,
 	.board_name = &pc263_boards[0].name,
 	.offset = sizeof(struct pc263_board),
-	.num_names = sizeof(pc263_boards) / sizeof(struct pc263_board),
+	.num_names = ARRAY_SIZE(pc263_boards),
 };
 
 static int pc263_request_region(unsigned minor, unsigned long from,
diff --git a/drivers/staging/comedi/drivers/amplc_pci224.c b/drivers/staging/comedi/drivers/amplc_pci224.c
index 19e4428c3380..6b53cb4b93f9 100644
--- a/drivers/staging/comedi/drivers/amplc_pci224.c
+++ b/drivers/staging/comedi/drivers/amplc_pci224.c
@@ -437,7 +437,7 @@ static struct comedi_driver driver_amplc_pci224 = {
 	.detach = pci224_detach,
 	.board_name = &pci224_boards[0].name,
 	.offset = sizeof(struct pci224_board),
-	.num_names = sizeof(pci224_boards) / sizeof(struct pci224_board),
+	.num_names = ARRAY_SIZE(pci224_boards),
 };
 
 COMEDI_PCI_INITCLEANUP(driver_amplc_pci224, pci224_pci_table);
diff --git a/drivers/staging/comedi/drivers/amplc_pci230.c b/drivers/staging/comedi/drivers/amplc_pci230.c
index 1d675173cd32..057443551c23 100644
--- a/drivers/staging/comedi/drivers/amplc_pci230.c
+++ b/drivers/staging/comedi/drivers/amplc_pci230.c
@@ -612,7 +612,7 @@ static struct comedi_driver driver_amplc_pci230 = {
 	.detach = pci230_detach,
 	.board_name = &pci230_boards[0].name,
 	.offset = sizeof(pci230_boards[0]),
-	.num_names = sizeof(pci230_boards) / sizeof(pci230_boards[0]),
+	.num_names = ARRAY_SIZE(pci230_boards),
 };
 
 COMEDI_PCI_INITCLEANUP(driver_amplc_pci230, pci230_pci_table);
diff --git a/drivers/staging/comedi/drivers/cb_pcidas.c b/drivers/staging/comedi/drivers/cb_pcidas.c
index 17dec7567481..11212b01d493 100644
--- a/drivers/staging/comedi/drivers/cb_pcidas.c
+++ b/drivers/staging/comedi/drivers/cb_pcidas.c
@@ -375,9 +375,6 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = {
 		},
 };
 
-/* Number of boards in cb_pcidas_boards */
-#define N_BOARDS	(sizeof(cb_pcidas_boards) / sizeof(struct cb_pcidas_board))
-
 static DEFINE_PCI_DEVICE_TABLE(cb_pcidas_pci_table) = {
 	{PCI_VENDOR_ID_CB, 0x0001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{PCI_VENDOR_ID_CB, 0x000f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
@@ -536,7 +533,7 @@ static int cb_pcidas_attach(struct comedi_device *dev, struct comedi_devconfig *
 		if (pcidev->vendor != PCI_VENDOR_ID_CB)
 			continue;
 		/*  loop through cards supported by this driver */
-		for (index = 0; index < N_BOARDS; index++) {
+		for (index = 0; index < ARRAY_SIZE(cb_pcidas_boards); index++) {
 			if (cb_pcidas_boards[index].device_id != pcidev->device)
 				continue;
 			/*  was a particular bus/slot requested? */
diff --git a/drivers/staging/comedi/drivers/cb_pcidas64.c b/drivers/staging/comedi/drivers/cb_pcidas64.c
index adce530adc53..caa8b568871d 100644
--- a/drivers/staging/comedi/drivers/cb_pcidas64.c
+++ b/drivers/staging/comedi/drivers/cb_pcidas64.c
@@ -1014,12 +1014,6 @@ static const struct pcidas64_board pcidas64_boards[] = {
 #endif
 };
 
-/* Number of boards in cb_pcidas_boards */
-static inline unsigned int num_boards(void)
-{
-	return sizeof(pcidas64_boards) / sizeof(struct pcidas64_board);
-}
-
 static DEFINE_PCI_DEVICE_TABLE(pcidas64_pci_table) = {
 	{PCI_VENDOR_ID_COMPUTERBOARDS, 0x001d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{PCI_VENDOR_ID_COMPUTERBOARDS, 0x001e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
@@ -1702,7 +1696,7 @@ static int attach(struct comedi_device *dev, struct comedi_devconfig *it)
 		if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
 			continue;
 		/*  loop through cards supported by this driver */
-		for (index = 0; index < num_boards(); index++) {
+		for (index = 0; index < ARRAY_SIZE(pcidas64_boards); index++) {
 			if (pcidas64_boards[index].device_id != pcidev->device)
 				continue;
 			/*  was a particular bus/slot requested? */
diff --git a/drivers/staging/comedi/drivers/cb_pcidio.c b/drivers/staging/comedi/drivers/cb_pcidio.c
index 799b5aded13c..dc701273167c 100644
--- a/drivers/staging/comedi/drivers/cb_pcidio.c
+++ b/drivers/staging/comedi/drivers/cb_pcidio.c
@@ -204,7 +204,7 @@ static int pcidio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 			continue;
 		/*  loop through cards supported by this driver */
 		for (index = 0;
-			index < sizeof pcidio_boards / sizeof(struct pcidio_board);
+			index < ARRAY_SIZE(pcidio_boards);
 			index++) {
 			if (pcidio_pci_table[index].device != pcidev->device)
 				continue;
diff --git a/drivers/staging/comedi/drivers/cb_pcimdda.c b/drivers/staging/comedi/drivers/cb_pcimdda.c
index 3ce133c69e27..57bb1182480d 100644
--- a/drivers/staging/comedi/drivers/cb_pcimdda.c
+++ b/drivers/staging/comedi/drivers/cb_pcimdda.c
@@ -135,8 +135,6 @@ static const struct board_struct boards[] = {
  */
 #define thisboard    ((const struct board_struct *)dev->board_ptr)
 
-/* Number of boards in boards[] */
-#define N_BOARDS	(sizeof(boards) / sizeof(struct board_struct))
 #define REG_SZ (thisboard->reg_sz)
 #define REGS_BADRINDEX (thisboard->regs_badrindex)
 
@@ -439,7 +437,7 @@ static int probe(struct comedi_device *dev, const struct comedi_devconfig *it)
 		if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
 			continue;
 		/*  loop through cards supported by this driver */
-		for (index = 0; index < N_BOARDS; index++) {
+		for (index = 0; index < ARRAY_SIZE(boards); index++) {
 			if (boards[index].device_id != pcidev->device)
 				continue;
 			/*  was a particular bus/slot requested? */
diff --git a/drivers/staging/comedi/drivers/comedi_bond.c b/drivers/staging/comedi/drivers/comedi_bond.c
index 1ee489864d3b..45cd41f7fd29 100644
--- a/drivers/staging/comedi/drivers/comedi_bond.c
+++ b/drivers/staging/comedi/drivers/comedi_bond.c
@@ -210,7 +210,7 @@ static struct comedi_driver driver_bonding = {
 	 */
       .board_name =	&bondingBoards[0].name,
       .offset =		sizeof(struct BondingBoard),
-      .num_names =	sizeof(bondingBoards) / sizeof(struct BondingBoard),
+      .num_names =	ARRAY_SIZE(bondingBoards),
 };
 
 static int bonding_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
diff --git a/drivers/staging/comedi/drivers/comedi_test.c b/drivers/staging/comedi/drivers/comedi_test.c
index e679328a4f8f..93ed1a0ae126 100644
--- a/drivers/staging/comedi/drivers/comedi_test.c
+++ b/drivers/staging/comedi/drivers/comedi_test.c
@@ -102,7 +102,7 @@ static struct comedi_driver driver_waveform = {
       .detach =		waveform_detach,
       .board_name =	&waveform_boards[0].name,
       .offset =		sizeof(struct waveform_board),
-      .num_names =	sizeof(waveform_boards) / sizeof(struct waveform_board),
+      .num_names =	ARRAY_SIZE(waveform_boards),
 };
 
 COMEDI_INITCLEANUP(driver_waveform);
diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c
index 982837d879ce..6ca888429e6a 100644
--- a/drivers/staging/comedi/drivers/das16.c
+++ b/drivers/staging/comedi/drivers/das16.c
@@ -696,8 +696,6 @@ static const struct das16_board das16_boards[] = {
 #endif
 };
 
-#define n_das16_boards ((sizeof(das16_boards))/(sizeof(struct das16_board)))
-
 static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it);
 static int das16_detach(struct comedi_device *dev);
 static struct comedi_driver driver_das16 = {
@@ -706,7 +704,7 @@ static struct comedi_driver driver_das16 = {
 	.attach = das16_attach,
 	.detach = das16_detach,
 	.board_name = &das16_boards[0].name,
-	.num_names = n_das16_boards,
+	.num_names = ARRAY_SIZE(das16_boards),
 	.offset = sizeof(das16_boards[0]),
 };
 
diff --git a/drivers/staging/comedi/drivers/das16m1.c b/drivers/staging/comedi/drivers/das16m1.c
index 91b1a0e7575c..e22f546e8162 100644
--- a/drivers/staging/comedi/drivers/das16m1.c
+++ b/drivers/staging/comedi/drivers/das16m1.c
@@ -164,8 +164,6 @@ static const struct das16m1_board das16m1_boards[] = {
 		},
 };
 
-#define das16m1_num_boards ((sizeof(das16m1_boards)) / (sizeof(das16m1_boards[0])))
-
 static int das16m1_attach(struct comedi_device *dev, struct comedi_devconfig *it);
 static int das16m1_detach(struct comedi_device *dev);
 static struct comedi_driver driver_das16m1 = {
@@ -174,7 +172,7 @@ static struct comedi_driver driver_das16m1 = {
 	.attach = das16m1_attach,
 	.detach = das16m1_detach,
 	.board_name = &das16m1_boards[0].name,
-	.num_names = das16m1_num_boards,
+	.num_names = ARRAY_SIZE(das16m1_boards),
 	.offset = sizeof(das16m1_boards[0]),
 };
 
diff --git a/drivers/staging/comedi/drivers/das1800.c b/drivers/staging/comedi/drivers/das1800.c
index 9c6c9b89558a..7fbcfb107e6d 100644
--- a/drivers/staging/comedi/drivers/das1800.c
+++ b/drivers/staging/comedi/drivers/das1800.c
@@ -509,7 +509,7 @@ static struct comedi_driver driver_das1800 = {
 	.module = THIS_MODULE,
 	.attach = das1800_attach,
 	.detach = das1800_detach,
-	.num_names = sizeof(das1800_boards) / sizeof(struct das1800_board),
+	.num_names = ARRAY_SIZE(das1800_boards),
 	.board_name = &das1800_boards[0].name,
 	.offset = sizeof(struct das1800_board),
 };
diff --git a/drivers/staging/comedi/drivers/das800.c b/drivers/staging/comedi/drivers/das800.c
index db646598619e..6ee9648e5e18 100644
--- a/drivers/staging/comedi/drivers/das800.c
+++ b/drivers/staging/comedi/drivers/das800.c
@@ -251,7 +251,7 @@ static struct comedi_driver driver_das800 = {
 	.module = THIS_MODULE,
 	.attach = das800_attach,
 	.detach = das800_detach,
-	.num_names = sizeof(das800_boards) / sizeof(struct das800_board),
+	.num_names = ARRAY_SIZE(das800_boards),
 	.board_name = &das800_boards[0].name,
 	.offset = sizeof(struct das800_board),
 };
diff --git a/drivers/staging/comedi/drivers/dmm32at.c b/drivers/staging/comedi/drivers/dmm32at.c
index e7c5130de8d0..47b3ebc34a68 100644
--- a/drivers/staging/comedi/drivers/dmm32at.c
+++ b/drivers/staging/comedi/drivers/dmm32at.c
@@ -285,7 +285,7 @@ static struct comedi_driver driver_dmm32at = {
  */
 	.board_name = &dmm32at_boards[0].name,
 	.offset = sizeof(struct dmm32at_board),
-	.num_names = sizeof(dmm32at_boards) / sizeof(struct dmm32at_board),
+	.num_names = ARRAY_SIZE(dmm32at_boards),
 };
 
 /* prototypes for driver functions below */
diff --git a/drivers/staging/comedi/drivers/dt2801.c b/drivers/staging/comedi/drivers/dt2801.c
index 335e3a0660cf..9b100405b8b7 100644
--- a/drivers/staging/comedi/drivers/dt2801.c
+++ b/drivers/staging/comedi/drivers/dt2801.c
@@ -217,7 +217,6 @@ static const struct dt2801_board boardtypes[] = {
 	.dabits = 12},
 };
 
-#define n_boardtypes ((sizeof(boardtypes))/(sizeof(boardtypes[0])))
 #define boardtype (*(const struct dt2801_board *)dev->board_ptr)
 
 struct dt2801_private {
@@ -506,7 +505,7 @@ static int dt2801_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	if (!board_code)
 		board_code = dt2801_reset(dev);
 
-	for (type = 0; type < n_boardtypes; type++) {
+	for (type = 0; type < ARRAY_SIZE(boardtypes); type++) {
 		if (boardtypes[type].boardcode == board_code)
 			goto havetype;
 	}
diff --git a/drivers/staging/comedi/drivers/dt2811.c b/drivers/staging/comedi/drivers/dt2811.c
index 7e6995ed886d..f05b3e711157 100644
--- a/drivers/staging/comedi/drivers/dt2811.c
+++ b/drivers/staging/comedi/drivers/dt2811.c
@@ -222,7 +222,7 @@ static struct comedi_driver driver_dt2811 = {
 	.attach = dt2811_attach,
 	.detach = dt2811_detach,
 	.board_name = &boardtypes[0].name,
-	.num_names = sizeof(boardtypes) / sizeof(struct dt2811_board),
+	.num_names = ARRAY_SIZE(boardtypes),
 	.offset = sizeof(struct dt2811_board),
 };
 
diff --git a/drivers/staging/comedi/drivers/gsc_hpdi.c b/drivers/staging/comedi/drivers/gsc_hpdi.c
index 098a78e9307a..a344e2cebde1 100644
--- a/drivers/staging/comedi/drivers/gsc_hpdi.c
+++ b/drivers/staging/comedi/drivers/gsc_hpdi.c
@@ -283,11 +283,6 @@ static const struct hpdi_board hpdi_boards[] = {
 #endif
 };
 
-static inline unsigned int num_boards(void)
-{
-	return sizeof(hpdi_boards) / sizeof(struct hpdi_board);
-}
-
 static DEFINE_PCI_DEVICE_TABLE(hpdi_pci_table) = {
 	{PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9080, PCI_VENDOR_ID_PLX, 0x2400,
 		0, 0, 0},
@@ -568,7 +563,7 @@ static int hpdi_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 		return -ENOMEM;
 
 	pcidev = NULL;
-	for (i = 0; i < num_boards() && dev->board_ptr == NULL; i++) {
+	for (i = 0; i < ARRAY_SIZE(hpdi_boards) && dev->board_ptr == NULL; i++) {
 		do {
 			pcidev = pci_get_subsys(PCI_VENDOR_ID_PLX,
 				hpdi_boards[i].device_id, PCI_VENDOR_ID_PLX,
diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c
index c3db3b80eba4..bffa3cf91c84 100644
--- a/drivers/staging/comedi/drivers/me4000.c
+++ b/drivers/staging/comedi/drivers/me4000.c
@@ -113,7 +113,7 @@ static const struct me4000_board me4000_boards[] = {
 	{0},
 };
 
-#define ME4000_BOARD_VERSIONS (sizeof(me4000_boards) / sizeof(struct me4000_board) - 1)
+#define ME4000_BOARD_VERSIONS (ARRAY_SIZE(me4000_boards) - 1)
 
 /*-----------------------------------------------------------------------------
   Comedi function prototypes
diff --git a/drivers/staging/comedi/drivers/ni_at_ao.c b/drivers/staging/comedi/drivers/ni_at_ao.c
index 1b752f615002..4e8bf9ed167c 100644
--- a/drivers/staging/comedi/drivers/ni_at_ao.c
+++ b/drivers/staging/comedi/drivers/ni_at_ao.c
@@ -190,7 +190,7 @@ static struct comedi_driver driver_atao = {
 	.detach = atao_detach,
 	.board_name = &atao_boards[0].name,
 	.offset = sizeof(struct atao_board),
-	.num_names = sizeof(atao_boards) / sizeof(struct atao_board),
+	.num_names = ARRAY_SIZE(atao_boards),
 };
 
 COMEDI_INITCLEANUP(driver_atao);
diff --git a/drivers/staging/comedi/drivers/ni_daq_700.c b/drivers/staging/comedi/drivers/ni_daq_700.c
index 3f0c1b3694dc..f01c0b008b50 100644
--- a/drivers/staging/comedi/drivers/ni_daq_700.c
+++ b/drivers/staging/comedi/drivers/ni_daq_700.c
@@ -104,7 +104,7 @@ static struct comedi_driver driver_dio700 = {
 	.module = THIS_MODULE,
 	.attach = dio700_attach,
 	.detach = dio700_detach,
-	.num_names = sizeof(dio700_boards) / sizeof(struct dio700_board),
+	.num_names = ARRAY_SIZE(dio700_boards),
 	.board_name = &dio700_boards[0].name,
 	.offset = sizeof(struct dio700_board),
 };
diff --git a/drivers/staging/comedi/drivers/ni_daq_dio24.c b/drivers/staging/comedi/drivers/ni_daq_dio24.c
index a0b3dd254384..68c3121c1b32 100644
--- a/drivers/staging/comedi/drivers/ni_daq_dio24.c
+++ b/drivers/staging/comedi/drivers/ni_daq_dio24.c
@@ -104,7 +104,7 @@ static struct comedi_driver driver_dio24 = {
 	.module = THIS_MODULE,
 	.attach = dio24_attach,
 	.detach = dio24_detach,
-	.num_names = sizeof(dio24_boards) / sizeof(struct dio24_board_struct),
+	.num_names = ARRAY_SIZE(dio24_boards),
 	.board_name = &dio24_boards[0].name,
 	.offset = sizeof(struct dio24_board_struct),
 };
diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c
index d1a2b5065036..031d994ed227 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -434,7 +434,7 @@ static struct comedi_driver driver_labpc = {
 	.module = THIS_MODULE,
 	.attach = labpc_attach,
 	.detach = labpc_common_detach,
-	.num_names = sizeof(labpc_boards) / sizeof(struct labpc_board_struct),
+	.num_names = ARRAY_SIZE(labpc_boards),
 	.board_name = &labpc_boards[0].name,
 	.offset = sizeof(struct labpc_board_struct),
 };
diff --git a/drivers/staging/comedi/drivers/ni_labpc_cs.c b/drivers/staging/comedi/drivers/ni_labpc_cs.c
index 41538c3c80ff..fb56c03a1b9f 100644
--- a/drivers/staging/comedi/drivers/ni_labpc_cs.c
+++ b/drivers/staging/comedi/drivers/ni_labpc_cs.c
@@ -121,7 +121,7 @@ static struct comedi_driver driver_labpc_cs = {
 	.module = THIS_MODULE,
 	.attach = &labpc_attach,
 	.detach = &labpc_common_detach,
-	.num_names = sizeof(labpc_cs_boards) / sizeof(struct labpc_board_struct),
+	.num_names = ARRAY_SIZE(labpc_cs_boards),
 	.board_name = &labpc_cs_boards[0].name,
 	.offset = sizeof(struct labpc_board_struct),
 };
diff --git a/drivers/staging/comedi/drivers/ni_stc.h b/drivers/staging/comedi/drivers/ni_stc.h
index d4d352b6b465..f97b18181534 100644
--- a/drivers/staging/comedi/drivers/ni_stc.h
+++ b/drivers/staging/comedi/drivers/ni_stc.h
@@ -1084,7 +1084,7 @@ static inline int M_Offset_Static_AI_Control(int i)
 		0x262,
 		0x263,
 	};
-	if (((unsigned)i) >= sizeof(offset) / sizeof(offset[0])) {
+	if (((unsigned)i) >= ARRAY_SIZE(offset)) {
 		rt_printk("%s: invalid channel=%i\n", __func__, i);
 		return offset[0];
 	}
@@ -1098,7 +1098,7 @@ static inline int M_Offset_AO_Reference_Attenuation(int channel)
 		0x266,
 		0x267
 	};
-	if (((unsigned)channel) >= sizeof(offset) / sizeof(offset[0])) {
+	if (((unsigned)channel) >= ARRAY_SIZE(offset)) {
 		rt_printk("%s: invalid channel=%i\n", __func__, channel);
 		return offset[0];
 	}
diff --git a/drivers/staging/comedi/drivers/pcmda12.c b/drivers/staging/comedi/drivers/pcmda12.c
index 7bc4d7ef9505..f1a8cdfaaa48 100644
--- a/drivers/staging/comedi/drivers/pcmda12.c
+++ b/drivers/staging/comedi/drivers/pcmda12.c
@@ -137,7 +137,7 @@ static struct comedi_driver driver = {
 	 */
 	.board_name = &pcmda12_boards[0].name,
 	.offset = sizeof(struct pcmda12_board),
-	.num_names = sizeof(pcmda12_boards) / sizeof(struct pcmda12_board),
+	.num_names = ARRAY_SIZE(pcmda12_boards),
 };
 
 static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
diff --git a/drivers/staging/comedi/drivers/pcmmio.c b/drivers/staging/comedi/drivers/pcmmio.c
index 9d025ab5b9f3..2ff2fe94b704 100644
--- a/drivers/staging/comedi/drivers/pcmmio.c
+++ b/drivers/staging/comedi/drivers/pcmmio.c
@@ -292,7 +292,7 @@ static struct comedi_driver driver = {
 	 */
 	.board_name = &pcmmio_boards[0].name,
 	.offset = sizeof(struct pcmmio_board),
-	.num_names = sizeof(pcmmio_boards) / sizeof(struct pcmmio_board),
+	.num_names = ARRAY_SIZE(pcmmio_boards),
 };
 
 static int pcmmio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c
index e515eadc0fb5..c28e6dfd0f9c 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -250,7 +250,7 @@ static struct comedi_driver driver = {
 	 */
 	.board_name = &pcmuio_boards[0].name,
 	.offset = sizeof(struct pcmuio_board),
-	.num_names = sizeof(pcmuio_boards) / sizeof(struct pcmuio_board),
+	.num_names = ARRAY_SIZE(pcmuio_boards),
 };
 
 static int pcmuio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index 0e765641838b..6af081b04a0c 100644
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -757,7 +757,7 @@ static int rtd_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 				continue;
 			}
 		}
-		for (i = 0; i < sizeof (rtd520Boards) / sizeof (rtd520Boards[0]); ++i)
+		for (i = 0; i < ARRAY_SIZE(rtd520Boards); ++i)
 		{
 			if (pcidev->device == rtd520Boards[i].device_id)
 			{
diff --git a/drivers/staging/comedi/drivers/rti800.c b/drivers/staging/comedi/drivers/rti800.c
index 57541d52a159..3986459a1645 100644
--- a/drivers/staging/comedi/drivers/rti800.c
+++ b/drivers/staging/comedi/drivers/rti800.c
@@ -138,7 +138,7 @@ static struct comedi_driver driver_rti800 = {
 	.module = THIS_MODULE,
 	.attach = rti800_attach,
 	.detach = rti800_detach,
-	.num_names = sizeof(boardtypes) / sizeof(struct rti800_board),
+	.num_names = ARRAY_SIZE(boardtypes),
 	.board_name = &boardtypes[0].name,
 	.offset = sizeof(struct rti800_board),
 };
@@ -199,8 +199,7 @@ static int rti800_ai_insn_read(struct comedi_device *dev, struct comedi_subdevic
 		/* without a delay here, the RTI_OVERRUN bit
 		 * gets set, and you will have an error. */
 		if (insn->n > 0) {
-			BUG_ON(gain >=
-				sizeof(gaindelay) / sizeof(gaindelay[0]));
+			BUG_ON(gain >= ARRAY_SIZE(gaindelay));
 			comedi_udelay(gaindelay[gain]);
 		}
 	}
diff --git a/drivers/staging/comedi/drivers/s526.c b/drivers/staging/comedi/drivers/s526.c
index d9b8f837bfdb..7a6be1ee8f61 100644
--- a/drivers/staging/comedi/drivers/s526.c
+++ b/drivers/staging/comedi/drivers/s526.c
@@ -244,7 +244,7 @@ static struct comedi_driver driver_s526 = {
 	 */
 	.board_name = &s526_boards[0].name,
 	.offset = sizeof(struct s526_board),
-	.num_names = sizeof(s526_boards) / sizeof(struct s526_board),
+	.num_names = ARRAY_SIZE(s526_boards),
 };
 
 static int s526_gpct_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
index 6e78194fe551..ff8ec589298c 100644
--- a/drivers/staging/comedi/drivers/s626.c
+++ b/drivers/staging/comedi/drivers/s626.c
@@ -2358,7 +2358,7 @@ static void LoadTrimDACs(struct comedi_device *dev)
 	register uint8_t i;
 
 	/*  Copy TrimDac setpoint values from EEPROM to TrimDacs. */
-	for (i = 0; i < (sizeof(trimchan) / sizeof(trimchan[0])); i++)
+	for (i = 0; i < ARRAY_SIZE(trimchan); i++)
 		WriteTrimDAC(dev, i, I2Cread(dev, trimadrs[i]));
 }
 
diff --git a/drivers/staging/comedi/drivers/serial2002.c b/drivers/staging/comedi/drivers/serial2002.c
index cf3e925261a0..89f97e85eff3 100644
--- a/drivers/staging/comedi/drivers/serial2002.c
+++ b/drivers/staging/comedi/drivers/serial2002.c
@@ -98,7 +98,7 @@ struct comedi_driver driver_serial2002 = {
 	.detach = serial2002_detach,
 	.board_name = &serial2002_boards[0].name,
 	.offset = sizeof(struct serial2002_board),
-	.num_names = sizeof(serial2002_boards) / sizeof(struct serial2002_board),
+	.num_names = ARRAY_SIZE(serial2002_boards),
 };
 
 static int serial2002_di_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
diff --git a/drivers/staging/comedi/drivers/skel.c b/drivers/staging/comedi/drivers/skel.c
index a0764f81917b..b73518129f85 100644
--- a/drivers/staging/comedi/drivers/skel.c
+++ b/drivers/staging/comedi/drivers/skel.c
@@ -181,7 +181,7 @@ static struct comedi_driver driver_skel = {
 	 */
 	.board_name = &skel_boards[0].name,
 	.offset = sizeof(struct skel_board),
-	.num_names = sizeof(skel_boards) / sizeof(struct skel_board),
+	.num_names = ARRAY_SIZE(skel_boards),
 };
 
 static int skel_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
diff --git a/drivers/staging/comedi/drivers/ssv_dnp.c b/drivers/staging/comedi/drivers/ssv_dnp.c
index b12c42991bba..13c29bb99100 100644
--- a/drivers/staging/comedi/drivers/ssv_dnp.c
+++ b/drivers/staging/comedi/drivers/ssv_dnp.c
@@ -99,7 +99,7 @@ static struct comedi_driver driver_dnp = {
 	.board_name = &dnp_boards[0].name,
 	/* only necessary for non-PnP devs   */
 	.offset = sizeof(struct dnp_board),/* like ISA-PnP, PCI or PCMCIA.      */
-	.num_names = sizeof(dnp_boards) / sizeof(struct dnp_board),
+	.num_names = ARRAY_SIZE(dnp_boards),
 };
 
 COMEDI_INITCLEANUP(driver_dnp);