net: ethernet: Use DIV_ROUND_UP instead of reimplementing its function

DIV_ROUND_UP has implemented the code-opened function. Therefore, just
replace the implementation with DIV_ROUND_UP.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Acked-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/sb1250-mac.c

@@ -156,7 +156,7 @@ enum sbmac_state {
 			  (d)->sbdma_dscrtable : (d)->f+1)
 
 
-#define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES)
+#define NUMCACHEBLKS(x) DIV_ROUND_UP(x, SMP_CACHE_BYTES)
 
 #define SBMAC_MAX_TXDESCR	256
 #define SBMAC_MAX_RXDESCR	256

drivers/net/ethernet/cavium/liquidio/octeon_droq.c

@@ -526,7 +526,7 @@ int octeon_retry_droq_refill(struct octeon_droq *droq)
 static inline u32
 octeon_droq_get_bufcount(u32 buf_size, u32 total_len)
 {
-	return ((total_len + buf_size - 1) / buf_size);
+	return DIV_ROUND_UP(total_len, buf_size);
 }
 
 static int

drivers/net/ethernet/freescale/gianfar_ethtool.c

@@ -230,7 +230,7 @@ static unsigned int gfar_usecs2ticks(struct gfar_private *priv,
 
 	/* Make sure we return a number greater than 0
 	 * if usecs > 0 */
-	return (usecs * 1000 + count - 1) / count;
+	return DIV_ROUND_UP(usecs * 1000, count);
 }
 
 /* Convert ethernet clock ticks to microseconds */

drivers/net/ethernet/ibm/emac/mal.h

@@ -136,7 +136,7 @@ static inline int mal_rx_size(int len)
 
 static inline int mal_tx_chunks(int len)
 {
-	return (len + MAL_MAX_TX_SIZE - 1) / MAL_MAX_TX_SIZE;
+	return DIV_ROUND_UP(len, MAL_MAX_TX_SIZE);
 }
 
 #define MAL_CHAN_MASK(n)	(0x80000000 >> (n))

drivers/net/ethernet/mellanox/mlx4/alloc.c

@@ -614,7 +614,7 @@ int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
 		int i;
 
 		buf->direct.buf = NULL;
-		buf->nbufs	= (size + PAGE_SIZE - 1) / PAGE_SIZE;
+		buf->nbufs      = DIV_ROUND_UP(size, PAGE_SIZE);
 		buf->npages	= buf->nbufs;
 		buf->page_shift  = PAGE_SHIFT;
 		buf->page_list   = kcalloc(buf->nbufs, sizeof(*buf->page_list),

drivers/net/ethernet/mellanox/mlx4/icm.c

@@ -406,7 +406,7 @@ int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
 	obj_per_chunk = MLX4_TABLE_CHUNK_SIZE / obj_size;
 	if (WARN_ON(!obj_per_chunk))
 		return -EINVAL;
-	num_icm = (nobj + obj_per_chunk - 1) / obj_per_chunk;
+	num_icm = DIV_ROUND_UP(nobj, obj_per_chunk);
 
 	table->icm      = kvcalloc(num_icm, sizeof(*table->icm), GFP_KERNEL);
 	if (!table->icm)

drivers/net/ethernet/mellanox/mlx5/core/srq.c

@@ -73,7 +73,7 @@ static int get_pas_size(struct mlx5_srq_attr *in)
 	u32 rq_sz	  = 1 << (log_srq_size + 4 + log_rq_stride);
 	u32 page_size	  = 1 << log_page_size;
 	u32 rq_sz_po      = rq_sz + (page_offset * po_quanta);
-	u32 rq_num_pas	  = (rq_sz_po + page_size - 1) / page_size;
+	u32 rq_num_pas    = DIV_ROUND_UP(rq_sz_po, page_size);
 
 	return rq_num_pas * sizeof(u64);
 }

drivers/net/ethernet/neterion/s2io.c

@@ -491,7 +491,7 @@ static struct pci_driver s2io_driver = {
 };
 
 /* A simplifier macro used both by init and free shared_mem Fns(). */
-#define TXD_MEM_PAGE_CNT(len, per_each) ((len+per_each - 1) / per_each)
+#define TXD_MEM_PAGE_CNT(len, per_each) DIV_ROUND_UP(len, per_each)
 
 /* netqueue manipulation helper functions */
 static inline void s2io_stop_all_tx_queue(struct s2io_nic *sp)