Merge branch 'DIV_ROUND_UP-uapi'

Nicolas Dichtel says:

====================
uapi: consolidate DIV_ROUND_UP definition

The inital goal was to consolidate ethtool.h uapi header. But I took the
opportunity to remove all duplicate definitions of DIV_ROUND_UP.

v3: add patch #2 and #3

v2: split the patch
    define DIV_ROUND_UP in uapi
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/gpu/drm/vmwgfx/device_include/svga3d_surfacedefs.h

@@ -25,6 +25,8 @@
  *
  **************************************************************************/
 
+#include <linux/kernel.h>
+
 #ifdef __KERNEL__
 
 #include <drm/vmwgfx_drm.h>
@@ -36,7 +38,6 @@
 #define ARRAY_SIZE(_A) (sizeof(_A) / sizeof((_A)[0]))
 #endif /* ARRAY_SIZE */
 
-#define DIV_ROUND_UP(x, y)  (((x) + (y) - 1) / (y))
 #define max_t(type, x, y)  ((x) > (y) ? (x) : (y))
 #define surf_size_struct SVGA3dSize
 #define u32 uint32
@@ -987,12 +988,12 @@ svga3dsurface_get_size_in_blocks(const struct svga3d_surface_desc *desc,
 				 const surf_size_struct *pixel_size,
 				 surf_size_struct *block_size)
 {
-	block_size->width = DIV_ROUND_UP(pixel_size->width,
-					 desc->block_size.width);
-	block_size->height = DIV_ROUND_UP(pixel_size->height,
-					  desc->block_size.height);
-	block_size->depth = DIV_ROUND_UP(pixel_size->depth,
-					 desc->block_size.depth);
+	block_size->width = __KERNEL_DIV_ROUND_UP(pixel_size->width,
+						  desc->block_size.width);
+	block_size->height = __KERNEL_DIV_ROUND_UP(pixel_size->height,
+						   desc->block_size.height);
+	block_size->depth = __KERNEL_DIV_ROUND_UP(pixel_size->depth,
+						  desc->block_size.depth);
 }
 
 static inline bool
@@ -1100,8 +1101,9 @@ svga3dsurface_get_pixel_offset(SVGA3dSurfaceFormat format,
 	const struct svga3d_surface_desc *desc = svga3dsurface_get_desc(format);
 	const u32 bw = desc->block_size.width, bh = desc->block_size.height;
 	const u32 bd = desc->block_size.depth;
-	const u32 rowstride = DIV_ROUND_UP(width, bw) * desc->bytes_per_block;
-	const u32 imgstride = DIV_ROUND_UP(height, bh) * rowstride;
+	const u32 rowstride = __KERNEL_DIV_ROUND_UP(width, bw) *
+			      desc->bytes_per_block;
+	const u32 imgstride = __KERNEL_DIV_ROUND_UP(height, bh) * rowstride;
 	const u32 offset = (z / bd * imgstride +
 			    y / bh * rowstride +
 			    x / bw * desc->bytes_per_block);

drivers/scsi/cxgbi/cxgb4i/cxgb4i.c

@@ -13,6 +13,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <scsi/scsi_host.h>
@@ -158,7 +159,6 @@ static struct scsi_transport_template *cxgb4i_stt;
  * open/close/abort and data send/receive.
  */
 
-#define DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
 #define RCV_BUFSIZ_MASK		0x3FFU
 #define MAX_IMM_TX_PKT_LEN	256
 

include/linux/kernel.h

@@ -64,7 +64,7 @@
 #define round_down(x, y) ((x) & ~__round_mask(x, y))
 
 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
-#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+#define DIV_ROUND_UP __KERNEL_DIV_ROUND_UP
 #define DIV_ROUND_UP_ULL(ll,d) \
 	({ unsigned long long _tmp = (ll)+(d)-1; do_div(_tmp, d); _tmp; })
 

include/uapi/linux/ethtool.h

@@ -13,9 +13,14 @@
 #ifndef _UAPI_LINUX_ETHTOOL_H
 #define _UAPI_LINUX_ETHTOOL_H
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/if_ether.h>
 
+#ifndef __KERNEL__
+#include <limits.h> /* for INT_MAX */
+#endif
+
 /* All structures exposed to userland should be defined such that they
  * have the same layout for 32-bit and 64-bit userland.
  */
@@ -1215,7 +1220,7 @@ enum ethtool_sfeatures_retval_bits {
 struct ethtool_per_queue_op {
 	__u32	cmd;
 	__u32	sub_command;
-	__u32	queue_mask[DIV_ROUND_UP(MAX_NUM_QUEUE, 32)];
+	__u32	queue_mask[__KERNEL_DIV_ROUND_UP(MAX_NUM_QUEUE, 32)];
 	char	data[];
 };
 

include/uapi/linux/kernel.h

@@ -9,5 +9,6 @@
 #define __ALIGN_KERNEL(x, a)		__ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
 #define __ALIGN_KERNEL_MASK(x, mask)	(((x) + (mask)) & ~(mask))
 
+#define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
 
 #endif /* _UAPI_LINUX_KERNEL_H */

include/uapi/linux/mroute6.h

 #ifndef _UAPI__LINUX_MROUTE6_H
 #define _UAPI__LINUX_MROUTE6_H
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/sockios.h>
 
@@ -46,14 +47,8 @@ typedef unsigned short mifi_t;
 typedef	__u32		if_mask;
 #define NIFBITS (sizeof(if_mask) * 8)        /* bits per mask */
 
-#if !defined(__KERNEL__)
-#if !defined(DIV_ROUND_UP)
-#define	DIV_ROUND_UP(x,y)	(((x) + ((y) - 1)) / (y))
-#endif
-#endif
-
 typedef struct if_set {
-	if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
+	if_mask ifs_bits[__KERNEL_DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
 } if_set;
 
 #define IF_SET(n, p)    ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))