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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-03-31 02:29:46 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-31 12:18:48 -0800
commitb175d03dd207283609b7f8bfdaa5dc93ac9b16dd (patch)
tree2a570c584d29fccf8159e87ddbd9b1cf4096b00b /drivers/mtd/cmdlinepart.c
parent87d10f3c7954d143e509a2af2bca2a27aeb3114d (diff)
downloadop-kernel-dev-b175d03dd207283609b7f8bfdaa5dc93ac9b16dd.zip
op-kernel-dev-b175d03dd207283609b7f8bfdaa5dc93ac9b16dd.tar.gz
[PATCH] mtd cmdlinepart: allow zero offset value
Current cmdlinepart.c uses offset value 0 to specify a continuous partition. This prevents creating a second partition starting at 0. For example, I can split 4MB device using "mtdparts=id:2M,2M", but I can not do "mtdparts=id:2M@2M,2M@0" to swap mtd0 and mtd1. This patch introduces special OFFSET_CONTINUOUS value for a continuous partition and allows 0 for offset value. Also this patch replaces 0xffffffff with UINT_MAX for SIZE_REMAINING. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/mtd/cmdlinepart.c')
-rw-r--r--drivers/mtd/cmdlinepart.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c
index 6b8bb2e..a7a7bfe 100644
--- a/drivers/mtd/cmdlinepart.c
+++ b/drivers/mtd/cmdlinepart.c
@@ -42,7 +42,8 @@
/* special size referring to all the remaining space in a partition */
-#define SIZE_REMAINING 0xffffffff
+#define SIZE_REMAINING UINT_MAX
+#define OFFSET_CONTINUOUS UINT_MAX
struct cmdline_mtd_partition {
struct cmdline_mtd_partition *next;
@@ -75,7 +76,7 @@ static struct mtd_partition * newpart(char *s,
{
struct mtd_partition *parts;
unsigned long size;
- unsigned long offset = 0;
+ unsigned long offset = OFFSET_CONTINUOUS;
char *name;
int name_len;
unsigned char *extra_mem;
@@ -314,7 +315,7 @@ static int parse_cmdline_partitions(struct mtd_info *master,
{
for(i = 0, offset = 0; i < part->num_parts; i++)
{
- if (!part->parts[i].offset)
+ if (part->parts[i].offset == OFFSET_CONTINUOUS)
part->parts[i].offset = offset;
else
offset = part->parts[i].offset;
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