part_dos: align disk buffers on cache line to enable DMA and cache

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>

disk/part_dos.c

diff --git a/disk/part_dos.c b/disk/part_dos.c
index b5bcb37..c028aaf 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -87,7 +87,7 @@
 
 int test_part_dos (block_dev_desc_t *dev_desc)
 {
-	unsigned char buffer[dev_desc->blksz];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 
 	if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
 	    (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
@@ -102,7 +102,7 @@
 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
 							   int part_num)
 {
-	unsigned char buffer[dev_desc->blksz];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 	dos_partition_t *pt;
 	int i;
 
@@ -166,7 +166,7 @@
 				 int relative, int part_num,
 				 int which_part, disk_partition_t *info)
 {
-	unsigned char buffer[dev_desc->blksz];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 	dos_partition_t *pt;
 	int i;