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authorMikulas Patocka <mpatocka@redhat.com>2017-04-18 23:51:46 +0300
committerMike Snitzer <snitzer@redhat.com>2017-04-24 19:04:31 +0300
commit3c12016910061c2a19d985fba7f7dec19d6a3a09 (patch)
treea14e713808ce97a29ab9daa99b628bb89334cc4b /drivers/md/dm-table.c
parentcc7e394024770d4bfd8463fab1a9e2e262a7d7c1 (diff)
downloadlinux-3c12016910061c2a19d985fba7f7dec19d6a3a09.tar.xz
dm table: replace while loops with for loops
Also remove some unnecessary use of uninitialized_var(). Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-table.c')
-rw-r--r--drivers/md/dm-table.c63
1 files changed, 32 insertions, 31 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index b0600840e734..7fb29db478cd 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -373,7 +373,7 @@ static int upgrade_mode(struct dm_dev_internal *dd, fmode_t new_mode,
*/
dev_t dm_get_dev_t(const char *path)
{
- dev_t uninitialized_var(dev);
+ dev_t dev;
struct block_device *bdev;
bdev = lookup_bdev(path);
@@ -627,13 +627,13 @@ static int validate_hardware_logical_block_alignment(struct dm_table *table,
struct dm_target *uninitialized_var(ti);
struct queue_limits ti_limits;
- unsigned i = 0;
+ unsigned i;
/*
* Check each entry in the table in turn.
*/
- while (i < dm_table_get_num_targets(table)) {
- ti = dm_table_get_target(table, i++);
+ for (i = 0; i < dm_table_get_num_targets(table); i++) {
+ ti = dm_table_get_target(table, i);
blk_set_stacking_limits(&ti_limits);
@@ -854,11 +854,11 @@ static int device_supports_dax(struct dm_target *ti, struct dm_dev *dev,
static bool dm_table_supports_dax(struct dm_table *t)
{
struct dm_target *ti;
- unsigned i = 0;
+ unsigned i;
/* Ensure that all targets support DAX. */
- while (i < dm_table_get_num_targets(t)) {
- ti = dm_table_get_target(t, i++);
+ for (i = 0; i < dm_table_get_num_targets(t); i++) {
+ ti = dm_table_get_target(t, i);
if (!ti->type->direct_access)
return false;
@@ -1010,11 +1010,11 @@ struct dm_target *dm_table_get_immutable_target(struct dm_table *t)
struct dm_target *dm_table_get_wildcard_target(struct dm_table *t)
{
- struct dm_target *uninitialized_var(ti);
- unsigned i = 0;
+ struct dm_target *ti;
+ unsigned i;
- while (i < dm_table_get_num_targets(t)) {
- ti = dm_table_get_target(t, i++);
+ for (i = 0; i < dm_table_get_num_targets(t); i++) {
+ ti = dm_table_get_target(t, i);
if (dm_target_is_wildcard(ti->type))
return ti;
}
@@ -1321,15 +1321,16 @@ static int count_device(struct dm_target *ti, struct dm_dev *dev,
*/
bool dm_table_has_no_data_devices(struct dm_table *table)
{
- struct dm_target *uninitialized_var(ti);
- unsigned i = 0, num_devices = 0;
+ struct dm_target *ti;
+ unsigned i, num_devices;
- while (i < dm_table_get_num_targets(table)) {
- ti = dm_table_get_target(table, i++);
+ for (i = 0; i < dm_table_get_num_targets(table); i++) {
+ ti = dm_table_get_target(table, i);
if (!ti->type->iterate_devices)
return false;
+ num_devices = 0;
ti->type->iterate_devices(ti, count_device, &num_devices);
if (num_devices)
return false;
@@ -1344,16 +1345,16 @@ bool dm_table_has_no_data_devices(struct dm_table *table)
int dm_calculate_queue_limits(struct dm_table *table,
struct queue_limits *limits)
{
- struct dm_target *uninitialized_var(ti);
+ struct dm_target *ti;
struct queue_limits ti_limits;
- unsigned i = 0;
+ unsigned i;
blk_set_stacking_limits(limits);
- while (i < dm_table_get_num_targets(table)) {
+ for (i = 0; i < dm_table_get_num_targets(table); i++) {
blk_set_stacking_limits(&ti_limits);
- ti = dm_table_get_target(table, i++);
+ ti = dm_table_get_target(table, i);
if (!ti->type->iterate_devices)
goto combine_limits;
@@ -1435,7 +1436,7 @@ static int device_flush_capable(struct dm_target *ti, struct dm_dev *dev,
static bool dm_table_supports_flush(struct dm_table *t, unsigned long flush)
{
struct dm_target *ti;
- unsigned i = 0;
+ unsigned i;
/*
* Require at least one underlying device to support flushes.
@@ -1443,8 +1444,8 @@ static bool dm_table_supports_flush(struct dm_table *t, unsigned long flush)
* so we need to use iterate_devices here, which targets
* supporting flushes must provide.
*/
- while (i < dm_table_get_num_targets(t)) {
- ti = dm_table_get_target(t, i++);
+ for (i = 0; i < dm_table_get_num_targets(t); i++) {
+ ti = dm_table_get_target(t, i);
if (!ti->num_flush_bios)
continue;
@@ -1504,10 +1505,10 @@ static bool dm_table_all_devices_attribute(struct dm_table *t,
iterate_devices_callout_fn func)
{
struct dm_target *ti;
- unsigned i = 0;
+ unsigned i;
- while (i < dm_table_get_num_targets(t)) {
- ti = dm_table_get_target(t, i++);
+ for (i = 0; i < dm_table_get_num_targets(t); i++) {
+ ti = dm_table_get_target(t, i);
if (!ti->type->iterate_devices ||
!ti->type->iterate_devices(ti, func, NULL))
@@ -1528,10 +1529,10 @@ static int device_not_write_same_capable(struct dm_target *ti, struct dm_dev *de
static bool dm_table_supports_write_same(struct dm_table *t)
{
struct dm_target *ti;
- unsigned i = 0;
+ unsigned i;
- while (i < dm_table_get_num_targets(t)) {
- ti = dm_table_get_target(t, i++);
+ for (i = 0; i < dm_table_get_num_targets(t); i++) {
+ ti = dm_table_get_target(t, i);
if (!ti->num_write_same_bios)
return false;
@@ -1555,7 +1556,7 @@ static int device_discard_capable(struct dm_target *ti, struct dm_dev *dev,
static bool dm_table_supports_discards(struct dm_table *t)
{
struct dm_target *ti;
- unsigned i = 0;
+ unsigned i;
/*
* Unless any target used by the table set discards_supported,
@@ -1564,8 +1565,8 @@ static bool dm_table_supports_discards(struct dm_table *t)
* so we need to use iterate_devices here, which targets
* supporting discard selectively must provide.
*/
- while (i < dm_table_get_num_targets(t)) {
- ti = dm_table_get_target(t, i++);
+ for (i = 0; i < dm_table_get_num_targets(t); i++) {
+ ti = dm_table_get_target(t, i);
if (!ti->num_discard_bios)
continue;