diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9c13be3..7c8ca05 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -810,7 +810,7 @@
 
 struct io_context;			/* See blkdev.h */
 #define NGROUPS_SMALL		32
-#define NGROUPS_PER_BLOCK	((int)(PAGE_SIZE / sizeof(gid_t)))
+#define NGROUPS_PER_BLOCK	((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
 struct group_info {
 	int ngroups;
 	atomic_t usage;
diff --git a/kernel/sys.c b/kernel/sys.c
index 2b8e2da..e3c08d4 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1145,16 +1145,16 @@
     struct group_info *group_info)
 {
 	int i;
-	int count = group_info->ngroups;
+	unsigned int count = group_info->ngroups;
 
 	for (i = 0; i < group_info->nblocks; i++) {
-		int cp_count = min(NGROUPS_PER_BLOCK, count);
-		int off = i * NGROUPS_PER_BLOCK;
-		int len = cp_count * sizeof(*grouplist);
+		unsigned int cp_count = min(NGROUPS_PER_BLOCK, count);
+		unsigned int len = cp_count * sizeof(*grouplist);
 
-		if (copy_to_user(grouplist+off, group_info->blocks[i], len))
+		if (copy_to_user(grouplist, group_info->blocks[i], len))
 			return -EFAULT;
 
+		grouplist += NGROUPS_PER_BLOCK;
 		count -= cp_count;
 	}
 	return 0;
@@ -1165,16 +1165,16 @@
     gid_t __user *grouplist)
 {
 	int i;
-	int count = group_info->ngroups;
+	unsigned int count = group_info->ngroups;
 
 	for (i = 0; i < group_info->nblocks; i++) {
-		int cp_count = min(NGROUPS_PER_BLOCK, count);
-		int off = i * NGROUPS_PER_BLOCK;
-		int len = cp_count * sizeof(*grouplist);
+		unsigned int cp_count = min(NGROUPS_PER_BLOCK, count);
+		unsigned int len = cp_count * sizeof(*grouplist);
 
-		if (copy_from_user(group_info->blocks[i], grouplist+off, len))
+		if (copy_from_user(group_info->blocks[i], grouplist, len))
 			return -EFAULT;
 
+		grouplist += NGROUPS_PER_BLOCK;
 		count -= cp_count;
 	}
 	return 0;