Move malloc_cache_aligned() to its own header

At present malloc.h is included everywhere since it recently was added to
common.h in this commit:

   4519668 mtd/nand/ubi: assortment of alignment fixes

This seems wasteful and unnecessary. We have been trying to trim down
common.h and put separate functions into separate header files and that
change goes in the opposite direction.

Move malloc_cache_aligned() to a new header so that this can be avoided.
The header would perhaps be better named as alignmem.h but it needs to be
included after common.h and people might be confused by this. With the name
memalign.h it fits nicely after malloc() in most cases.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>

common/cmd_ubi.c

@@ -14,7 +14,7 @@
 #include <common.h>
 #include <command.h>
 #include <exports.h>
-
+#include <memalign.h>
 #include <nand.h>
 #include <onenand_uboot.h>
 #include <linux/mtd/mtd.h>

drivers/mtd/nand/nand_util.c

@@ -23,6 +23,7 @@
 #include <command.h>
 #include <watchdog.h>
 #include <malloc.h>
+#include <memalign.h>
 #include <div64.h>
 
 #include <asm/errno.h>

fs/ubifs/super.c

@@ -28,6 +28,9 @@
 #include <linux/writeback.h>
 #else
 
+#include <common.h>
+#include <malloc.h>
+#include <memalign.h>
 #include <linux/compat.h>
 #include <linux/stat.h>
 #include <linux/err.h>

fs/ubifs/ubifs.c

@@ -23,6 +23,8 @@
  *          Adrian Hunter
  */
 
+#include <common.h>
+#include <memalign.h>
 #include "ubifs.h"
 #include <u-boot/zlib.h>
 

include/common.h

@@ -1060,15 +1060,6 @@ int cpu_release(int nr, int argc, char * const argv[]);
 #define DEFINE_CACHE_ALIGN_BUFFER(type, name, size)			\
 	DEFINE_ALIGN_BUFFER(type, name, size, ARCH_DMA_MINALIGN)
 
-#ifndef __ASSEMBLY__
-#include <malloc.h>
-
-static inline void *malloc_cache_aligned(size_t size)
-{
-	return memalign(ARCH_DMA_MINALIGN, ALIGN(size, ARCH_DMA_MINALIGN));
-}
-#endif
-
 /*
  * check_member() - Check the offset of a structure member
  *

include/memalign.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef __ALIGNMEM_H
+#define __ALIGNMEM_H
+
+/*
+ * ARCH_DMA_MINALIGN is defined in asm/cache.h for each architecture.  It
+ * is used to align DMA buffers.
+ */
+#ifndef __ASSEMBLY__
+#include <asm/cache.h>
+
+#include <malloc.h>
+
+static inline void *malloc_cache_aligned(size_t size)
+{
+	return memalign(ARCH_DMA_MINALIGN, ALIGN(size, ARCH_DMA_MINALIGN));
+}
+#endif
+
+#endif /* __ALIGNMEM_H */

lib/gzip.c

@@ -10,6 +10,7 @@
 #include <command.h>
 #include <image.h>
 #include <malloc.h>
+#include <memalign.h>
 #include <u-boot/zlib.h>
 #include "zlib/zutil.h"
 

lib/zlib/zutil.c

@@ -43,7 +43,9 @@ void z_error (m)
  */
 #ifndef MY_ZCALLOC /* Any system without a special alloc function */
 
-#ifndef __UBOOT__
+#ifdef __UBOOT__
+#include <malloc.h>
+#else
 #ifndef STDC
 extern voidp    malloc OF((uInt size));
 extern voidp    calloc OF((uInt items, uInt size));