Merge branch 'for-4.15/timer' into for-linus

Post initial pull timer related changes for block drivers. Not merged
with the first pull, since they were dependent on this commit in
mainline:

commit 686fef92
Author: Kees Cook <keescook@chromium.org>
Date:   Thu Sep 28 06:38:17 2017 -0700

    timer: Prepare to change timer callback argument type

drivers/block/amiflop.c

@@ -146,6 +146,7 @@ static struct amiga_floppy_struct unit[FD_MAX_UNITS];
 
 static struct timer_list flush_track_timer[FD_MAX_UNITS];
 static struct timer_list post_write_timer;
+static unsigned long post_write_timer_drive;
 static struct timer_list motor_on_timer;
 static struct timer_list motor_off_timer[FD_MAX_UNITS];
 static int on_attempts;
@@ -323,7 +324,7 @@ static void fd_deselect (int drive)
 
 }
 
-static void motor_on_callback(unsigned long ignored)
+static void motor_on_callback(struct timer_list *unused)
 {
 	if (!(ciaa.pra & DSKRDY) || --on_attempts == 0) {
 		complete_all(&motor_on_completion);
@@ -355,7 +356,7 @@ static int fd_motor_on(int nr)
 		on_attempts = -1;
 #if 0
 		printk (KERN_ERR "motor_on failed, turning motor off\n");
-		fd_motor_off (nr);
+		fd_motor_off (motor_off_timer + nr);
 		return 0;
 #else
 		printk (KERN_WARNING "DSKRDY not set after 1.5 seconds - assuming drive is spinning notwithstanding\n");
@@ -365,20 +366,17 @@ static int fd_motor_on(int nr)
 	return 1;
 }
 
-static void fd_motor_off(unsigned long drive)
+static void fd_motor_off(struct timer_list *timer)
 {
-	long calledfromint;
-#ifdef MODULE
-	long decusecount;
+	unsigned long drive = ((unsigned long)timer -
+			       (unsigned long)&motor_off_timer[0]) /
+					sizeof(motor_off_timer[0]);
 
-	decusecount = drive & 0x40000000;
-#endif
-	calledfromint = drive & 0x80000000;
 	drive&=3;
-	if (calledfromint && !try_fdc(drive)) {
+	if (!try_fdc(drive)) {
 		/* We would be blocked in an interrupt, so try again later */
-		motor_off_timer[drive].expires = jiffies + 1;
-		add_timer(motor_off_timer + drive);
+		timer->expires = jiffies + 1;
+		add_timer(timer);
 		return;
 	}
 	unit[drive].motor = 0;
@@ -392,8 +390,6 @@ static void floppy_off (unsigned int nr)
 	int drive;
 
 	drive = nr & 3;
-	/* called this way it is always from interrupt */
-	motor_off_timer[drive].data = nr | 0x80000000;
 	mod_timer(motor_off_timer + drive, jiffies + 3*HZ);
 }
 
@@ -435,7 +431,7 @@ static int fd_calibrate(int drive)
 			break;
 		if (--n == 0) {
 			printk (KERN_ERR "fd%d: calibrate failed, turning motor off\n", drive);
-			fd_motor_off (drive);
+			fd_motor_off (motor_off_timer + drive);
 			unit[drive].track = -1;
 			rel_fdc();
 			return 0;
@@ -564,7 +560,7 @@ static irqreturn_t fd_block_done(int irq, void *dummy)
 	if (block_flag == 2) { /* writing */
 		writepending = 2;
 		post_write_timer.expires = jiffies + 1; /* at least 2 ms */
-		post_write_timer.data = selected;
+		post_write_timer_drive = selected;
 		add_timer(&post_write_timer);
 	}
 	else {                /* reading */
@@ -651,6 +647,10 @@ static void post_write (unsigned long drive)
 	rel_fdc(); /* corresponds to get_fdc() in raw_write */
 }
 
+static void post_write_callback(struct timer_list *timer)
+{
+	post_write(post_write_timer_drive);
+}
 
 /*
  * The following functions are to convert the block contents into raw data
@@ -1244,8 +1244,12 @@ static void dos_write(int disk)
 /* FIXME: this assumes the drive is still spinning -
  * which is only true if we complete writing a track within three seconds
  */
-static void flush_track_callback(unsigned long nr)
+static void flush_track_callback(struct timer_list *timer)
 {
+	unsigned long nr = ((unsigned long)timer -
+			       (unsigned long)&flush_track_timer[0]) /
+					sizeof(flush_track_timer[0]);
+
 	nr&=3;
 	writefromint = 1;
 	if (!try_fdc(nr)) {
@@ -1649,8 +1653,7 @@ static void floppy_release(struct gendisk *disk, fmode_t mode)
 		fd_ref[drive] = 0;
 	}
 #ifdef MODULE
-/* the mod_use counter is handled this way */
-	floppy_off (drive | 0x40000000);
+	floppy_off (drive);
 #endif
 	mutex_unlock(&amiflop_mutex);
 }
@@ -1791,27 +1794,19 @@ static int __init amiga_floppy_probe(struct platform_device *pdev)
 				floppy_find, NULL, NULL);
 
 	/* initialize variables */
-	init_timer(&motor_on_timer);
+	timer_setup(&motor_on_timer, motor_on_callback, 0);
 	motor_on_timer.expires = 0;
-	motor_on_timer.data = 0;
-	motor_on_timer.function = motor_on_callback;
 	for (i = 0; i < FD_MAX_UNITS; i++) {
-		init_timer(&motor_off_timer[i]);
+		timer_setup(&motor_off_timer[i], fd_motor_off, 0);
 		motor_off_timer[i].expires = 0;
-		motor_off_timer[i].data = i|0x80000000;
-		motor_off_timer[i].function = fd_motor_off;
-		init_timer(&flush_track_timer[i]);
+		timer_setup(&flush_track_timer[i], flush_track_callback, 0);
 		flush_track_timer[i].expires = 0;
-		flush_track_timer[i].data = i;
-		flush_track_timer[i].function = flush_track_callback;
 
 		unit[i].track = -1;
 	}
 
-	init_timer(&post_write_timer);
+	timer_setup(&post_write_timer, post_write_callback, 0);
 	post_write_timer.expires = 0;
-	post_write_timer.data = 0;
-	post_write_timer.function = post_write;
   
 	for (i = 0; i < 128; i++)
 		mfmdecode[i]=255;

drivers/block/aoe/aoecmd.c

@@ -744,7 +744,7 @@ count_targets(struct aoedev *d, int *untainted)
 }
 
 static void
-rexmit_timer(ulong vp)
+rexmit_timer(struct timer_list *timer)
 {
 	struct aoedev *d;
 	struct aoetgt *t;
@@ -758,7 +758,7 @@ rexmit_timer(ulong vp)
 	int utgts;	/* number of aoetgt descriptors (not slots) */
 	int since;
 
-	d = (struct aoedev *) vp;
+	d = from_timer(d, timer, timer);
 
 	spin_lock_irqsave(&d->lock, flags);
 
@@ -1429,7 +1429,7 @@ aoecmd_ata_id(struct aoedev *d)
 
 	d->rttavg = RTTAVG_INIT;
 	d->rttdev = RTTDEV_INIT;
-	d->timer.function = rexmit_timer;
+	d->timer.function = (TIMER_FUNC_TYPE)rexmit_timer;
 
 	skb = skb_clone(skb, GFP_ATOMIC);
 	if (skb) {

drivers/block/aoe/aoedev.c

@@ -15,7 +15,6 @@
 #include <linux/string.h>
 #include "aoe.h"
 
-static void dummy_timer(ulong);
 static void freetgt(struct aoedev *d, struct aoetgt *t);
 static void skbpoolfree(struct aoedev *d);
 
@@ -146,11 +145,11 @@ aoedev_put(struct aoedev *d)
 }
 
 static void
-dummy_timer(ulong vp)
+dummy_timer(struct timer_list *t)
 {
 	struct aoedev *d;
 
-	d = (struct aoedev *)vp;
+	d = from_timer(d, t, timer);
 	if (d->flags & DEVFL_TKILL)
 		return;
 	d->timer.expires = jiffies + HZ;
@@ -466,9 +465,7 @@ aoedev_by_aoeaddr(ulong maj, int min, int do_alloc)
 	INIT_WORK(&d->work, aoecmd_sleepwork);
 	spin_lock_init(&d->lock);
 	skb_queue_head_init(&d->skbpool);
-	init_timer(&d->timer);
-	d->timer.data = (ulong) d;
-	d->timer.function = dummy_timer;
+	timer_setup(&d->timer, dummy_timer, 0);
 	d->timer.expires = jiffies + HZ;
 	add_timer(&d->timer);
 	d->bufpool = NULL;	/* defer to aoeblk_gdalloc */

drivers/block/floppy.c

@@ -903,10 +903,14 @@ static void unlock_fdc(void)
 }
 
 /* switches the motor off after a given timeout */
-static void motor_off_callback(unsigned long nr)
+static void motor_off_callback(struct timer_list *t)
 {
+	unsigned long nr = t - motor_off_timer;
 	unsigned char mask = ~(0x10 << UNIT(nr));
 
+	if (WARN_ON_ONCE(nr >= N_DRIVE))
+		return;
+
 	set_dor(FDC(nr), mask, 0);
 }
 
@@ -3047,7 +3051,7 @@ static void raw_cmd_done(int flag)
 		else
 			raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
 		if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
-			motor_off_callback(current_drive);
+			motor_off_callback(&motor_off_timer[current_drive]);
 
 		if (raw_cmd->next &&
 		    (!(raw_cmd->flags & FD_RAW_FAILURE) ||
@@ -4542,7 +4546,7 @@ static int __init do_floppy_init(void)
 		disks[drive]->fops = &floppy_fops;
 		sprintf(disks[drive]->disk_name, "fd%d", drive);
 
-		setup_timer(&motor_off_timer[drive], motor_off_callback, drive);
+		timer_setup(&motor_off_timer[drive], motor_off_callback, 0);
 	}
 
 	err = register_blkdev(FLOPPY_MAJOR, "fd");

drivers/block/swim3.c

@@ -239,10 +239,10 @@ static unsigned short write_postamble[] = {
 static void seek_track(struct floppy_state *fs, int n);
 static void init_dma(struct dbdma_cmd *cp, int cmd, void *buf, int count);
 static void act(struct floppy_state *fs);
-static void scan_timeout(unsigned long data);
-static void seek_timeout(unsigned long data);
-static void settle_timeout(unsigned long data);
-static void xfer_timeout(unsigned long data);
+static void scan_timeout(struct timer_list *t);
+static void seek_timeout(struct timer_list *t);
+static void settle_timeout(struct timer_list *t);
+static void xfer_timeout(struct timer_list *t);
 static irqreturn_t swim3_interrupt(int irq, void *dev_id);
 /*static void fd_dma_interrupt(int irq, void *dev_id);*/
 static int grab_drive(struct floppy_state *fs, enum swim_state state,
@@ -392,13 +392,12 @@ static void do_fd_request(struct request_queue * q)
 }
 
 static void set_timeout(struct floppy_state *fs, int nticks,
-			void (*proc)(unsigned long))
+			void (*proc)(struct timer_list *t))
 {
 	if (fs->timeout_pending)
 		del_timer(&fs->timeout);
 	fs->timeout.expires = jiffies + nticks;
-	fs->timeout.function = proc;
-	fs->timeout.data = (unsigned long) fs;
+	fs->timeout.function = (TIMER_FUNC_TYPE)proc;
 	add_timer(&fs->timeout);
 	fs->timeout_pending = 1;
 }
@@ -569,9 +568,9 @@ static void act(struct floppy_state *fs)
 	}
 }
 
-static void scan_timeout(unsigned long data)
+static void scan_timeout(struct timer_list *t)
 {
-	struct floppy_state *fs = (struct floppy_state *) data;
+	struct floppy_state *fs = from_timer(fs, t, timeout);
 	struct swim3 __iomem *sw = fs->swim3;
 	unsigned long flags;
 
@@ -594,9 +593,9 @@ static void scan_timeout(unsigned long data)
 	spin_unlock_irqrestore(&swim3_lock, flags);
 }
 
-static void seek_timeout(unsigned long data)
+static void seek_timeout(struct timer_list *t)
 {
-	struct floppy_state *fs = (struct floppy_state *) data;
+	struct floppy_state *fs = from_timer(fs, t, timeout);
 	struct swim3 __iomem *sw = fs->swim3;
 	unsigned long flags;
 
@@ -614,9 +613,9 @@ static void seek_timeout(unsigned long data)
 	spin_unlock_irqrestore(&swim3_lock, flags);
 }
 
-static void settle_timeout(unsigned long data)
+static void settle_timeout(struct timer_list *t)
 {
-	struct floppy_state *fs = (struct floppy_state *) data;
+	struct floppy_state *fs = from_timer(fs, t, timeout);
 	struct swim3 __iomem *sw = fs->swim3;
 	unsigned long flags;
 
@@ -644,9 +643,9 @@ static void settle_timeout(unsigned long data)
 	spin_unlock_irqrestore(&swim3_lock, flags);
 }
 
-static void xfer_timeout(unsigned long data)
+static void xfer_timeout(struct timer_list *t)
 {
-	struct floppy_state *fs = (struct floppy_state *) data;
+	struct floppy_state *fs = from_timer(fs, t, timeout);
 	struct swim3 __iomem *sw = fs->swim3;
 	struct dbdma_regs __iomem *dr = fs->dma;
 	unsigned long flags;
@@ -1182,7 +1181,7 @@ static int swim3_add_device(struct macio_dev *mdev, int index)
 		return -EBUSY;
 	}
 
-	init_timer(&fs->timeout);
+	timer_setup(&fs->timeout, NULL, 0);
 
 	swim3_info("SWIM3 floppy controller %s\n",
 		mdev->media_bay ? "in media bay" : "");

drivers/md/bcache/stats.c

@@ -147,9 +147,9 @@ 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);		\
@@ -234,9 +234,7 @@ 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);
 }

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);

drivers/md/dm-integrity.c

@@ -1094,9 +1094,9 @@ 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);
@@ -2942,7 +2942,7 @@ 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)) {

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);
 

drivers/md/md.c

@@ -541,7 +541,7 @@ 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)
 {
@@ -550,8 +550,7 @@ 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);
@@ -5404,9 +5403,9 @@ 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)