Changed uint32_t to chunk_t, so that there is no 32-bit limitation on systems
with 64-bit sector numbers. chunk_t is 64-bit only if the architecture is
64-bit or if the user explicitly enabled large devices in kernel config, so
there will be no performance or code-size penalty for normal uses.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

---
 drivers/md/dm-exception-store.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Index: linux-2.6.26-fast/drivers/md/dm-exception-store.c
===================================================================
--- linux-2.6.26-fast.orig/drivers/md/dm-exception-store.c	2008-07-16 22:58:19.000000000 +0200
+++ linux-2.6.26-fast/drivers/md/dm-exception-store.c	2008-07-16 23:03:58.000000000 +0200
@@ -108,12 +108,12 @@ struct pstore {
 	 * Used to keep track of which metadata area the data in
 	 * 'chunk' refers to.
 	 */
-	uint32_t current_area;
+	chunk_t current_area;
 
 	/*
 	 * The next free chunk for an exception.
 	 */
-	uint32_t next_free;
+	chunk_t next_free;
 
 	/*
 	 * The index of next free exception in the current
@@ -175,7 +175,7 @@ static void do_metadata(struct work_stru
 /*
  * Read or write a chunk aligned and sized block of data from a device.
  */
-static int chunk_io(struct pstore *ps, uint32_t chunk, int rw, int metadata)
+static int chunk_io(struct pstore *ps, chunk_t chunk, int rw, int metadata)
 {
 	struct dm_io_region where = {
 		.bdev = ps->snap->cow->bdev,
@@ -212,10 +212,10 @@ static int chunk_io(struct pstore *ps, u
  * Read or write a metadata area.  Remembering to skip the first
  * chunk which holds the header.
  */
-static int area_io(struct pstore *ps, uint32_t area, int rw)
+static int area_io(struct pstore *ps, chunk_t area, int rw)
 {
 	int r;
-	uint32_t chunk;
+	chunk_t chunk;
 
 	/* convert a metadata area index to a chunk index */
 	chunk = 1 + ((ps->exceptions_per_area + 1) * area);
@@ -228,7 +228,7 @@ static int area_io(struct pstore *ps, ui
 	return 0;
 }
 
-static int zero_area(struct pstore *ps, uint32_t area)
+static int zero_area(struct pstore *ps, chunk_t area)
 {
 	memset(ps->area, 0, ps->snap->chunk_size << SECTOR_SHIFT);
 	return area_io(ps, area, WRITE);
@@ -407,7 +407,7 @@ static int insert_exceptions(struct psto
 
 static int read_exceptions(struct pstore *ps)
 {
-	uint32_t area;
+	chunk_t area;
 	int r, full = 1;
 
 	/*