[PATCH] md: Convert timers to use timer_setup()

Kees Cook
2017-10-17T00:01:53Z

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Shaohua Li <shli@kernel.org>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: dm-devel@redhat.com
Cc: linux-bcache@vger.kernel.org
Cc: linux-raid@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/md/bcache/stats.c | 8 +++-----
drivers/md/dm-delay.c | 6 +++---
drivers/md/dm-integrity.c | 6 +++---
drivers/md/dm-raid1.c | 8 +++-----
drivers/md/md.c | 9 ++++-----
5 files changed, 16 insertions(+), 21 deletions(-)

diff --git a/drivers/md/bcache/stats.c b/drivers/md/bcache/stats.c
index 0ca072c20d0d..93a89c528760 100644
--- a/drivers/md/bcache/stats.c
+++ b/drivers/md/bcache/stats.c
@@ -146,9 +146,9 @@ static void scale_stats(struct cache_stats *stats, unsigned long rescale_at)
}
}

-static void scale_accounting(unsigned long data)
+static void scale_accounting(struct timer_list *t)
{
- struct cache_accounting *acc = (struct cache_accounting *) data;
+ struct cache_accounting *acc = from_timer(acc, t, timer);

#define move_stat(name) do { \
unsigned t = atomic_xchg(&acc->collector.name, 0); \
@@ -233,9 +233,7 @@ void bch_cache_accounting_init(struct cache_accounting *acc,
kobject_init(&acc->day.kobj, &bch_stats_ktype);

closure_init(&acc->cl, parent);
- init_timer(&acc->timer);
+ timer_setup(&acc->timer, scale_accounting, 0);
acc->timer.expires = jiffies + accounting_delay;
- acc->timer.data = (unsigned long) acc;
- acc->timer.function = scale_accounting;
add_timer(&acc->timer);
}
diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index 2209a9700acd..288386bfbfb5 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -44,9 +44,9 @@ struct dm_delay_info {

static DEFINE_MUTEX(delayed_bios_lock);

-static void handle_delayed_timer(unsigned long data)
+static void handle_delayed_timer(struct timer_list *t)
{
- struct delay_c *dc = (struct delay_c *)data;
+ struct delay_c *dc = from_timer(dc, t, delay_timer);

queue_work(dc->kdelayd_wq, &dc->flush_expired_bios);
}
@@ -195,7 +195,7 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto bad_queue;
}

- setup_timer(&dc->delay_timer, handle_delayed_timer, (unsigned long)dc);
+ timer_setup(&dc->delay_timer, handle_delayed_timer, 0);

INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);
INIT_LIST_HEAD(&dc->delayed_bios);
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 096fe9b66c50..98f0b645b839 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1093,9 +1093,9 @@ static void sleep_on_endio_wait(struct dm_integrity_c *ic)
__remove_wait_queue(&ic->endio_wait, &wait);
}

-static void autocommit_fn(unsigned long data)
+static void autocommit_fn(struct timer_list *t)
{
- struct dm_integrity_c *ic = (struct dm_integrity_c *)data;
+ struct dm_integrity_c *ic = from_timer(ic, t, autocommit_timer);

if (likely(!dm_integrity_failed(ic)))
queue_work(ic->commit_wq, &ic->commit_work);
@@ -2941,7 +2941,7 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)

ic->autocommit_jiffies = msecs_to_jiffies(sync_msec);
ic->autocommit_msec = sync_msec;
- setup_timer(&ic->autocommit_timer, autocommit_fn, (unsigned long)ic);
+ timer_setup(&ic->autocommit_timer, autocommit_fn, 0);

ic->io = dm_io_client_create();
if (IS_ERR(ic->io)) {
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index c0b82136b2d1..580c49cc8079 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -94,9 +94,9 @@ static void wakeup_mirrord(void *context)
queue_work(ms->kmirrord_wq, &ms->kmirrord_work);
}

-static void delayed_wake_fn(unsigned long data)
+static void delayed_wake_fn(struct timer_list *t)
{
- struct mirror_set *ms = (struct mirror_set *) data;
+ struct mirror_set *ms = from_timer(ms, t, timer);

clear_bit(0, &ms->timer_pending);
wakeup_mirrord(ms);
@@ -108,8 +108,6 @@ static void delayed_wake(struct mirror_set *ms)
return;

ms->timer.expires = jiffies + HZ / 5;
- ms->timer.data = (unsigned long) ms;
- ms->timer.function = delayed_wake_fn;
add_timer(&ms->timer);
}

@@ -1133,7 +1131,7 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto err_free_context;
}
INIT_WORK(&ms->kmirrord_work, do_mirror);
- init_timer(&ms->timer);
+ timer_setup(&ms->timer, delayed_wake_fn, 0);
ms->timer_pending = 0;
INIT_WORK(&ms->trigger_event, trigger_event);

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 97afb28c6f51..873a20f44197 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -520,7 +520,7 @@ static void mddev_put(struct mddev *mddev)
bioset_free(sync_bs);
}

-static void md_safemode_timeout(unsigned long data);
+static void md_safemode_timeout(struct timer_list *t);

void mddev_init(struct mddev *mddev)
{
@@ -529,8 +529,7 @@ void mddev_init(struct mddev *mddev)
mutex_init(&mddev->bitmap_info.mutex);
INIT_LIST_HEAD(&mddev->disks);
INIT_LIST_HEAD(&mddev->all_mddevs);
- setup_timer(&mddev->safemode_timer, md_safemode_timeout,
- (unsigned long) mddev);
+ timer_setup(&mddev->safemode_timer, md_safemode_timeout, 0);
atomic_set(&mddev->active, 1);
atomic_set(&mddev->openers, 0);
atomic_set(&mddev->active_io, 0);
@@ -5386,9 +5385,9 @@ static int add_named_array(const char *val, struct kernel_param *kp)
return -EINVAL;
}

-static void md_safemode_timeout(unsigned long data)
+static void md_safemode_timeout(struct timer_list *t)
{
- struct mddev *mddev = (struct mddev *) data;
+ struct mddev *mddev = from_timer(mddev, t, safemode_timer);

mddev->safemode = 1;
if (mddev->external)
--
2.7.4

--
Kees Cook
Pixel Security