[PATCH] md: fix sync_completed reporting for very large drives (>2TB)

["Rémi Rérolle" <remi.rerolle@gmail.com>]

From: Rémi Rérolle <rrerolle@lacie.com>

The values exported in the sync_completed file are unsigned long, which
overflows with very large drives, resulting in wrong values reported.

Since sync_completed uses sectors as unit, we'll start getting wrong
values with components larger than 2TB.

This patch simply replaces the use of unsigned long by unsigned long long.

Signed-off-by: Rémi Rérolle <rrerolle@lacie.com>
---
 drivers/md/md.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 175c424..ea46b3b 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3912,7 +3912,7 @@ static struct md_sysfs_entry md_sync_speed = __ATTR_RO(sync_speed);
 static ssize_t
 sync_completed_show(mddev_t *mddev, char *page)
 {
-	unsigned long max_sectors, resync;
+	unsigned long long max_sectors, resync;
 
 	if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
 		return sprintf(page, "none\n");
@@ -3923,7 +3923,7 @@ sync_completed_show(mddev_t *mddev, char *page)
 		max_sectors = mddev->dev_sectors;
 
 	resync = mddev->curr_resync_completed;
-	return sprintf(page, "%lu / %lu\n", resync, max_sectors);
+	return sprintf(page, "%llu / %llu\n", resync, max_sectors);
 }
 
 static struct md_sysfs_entry md_sync_completed = __ATTR_RO(sync_completed);
-- 
1.7.1

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