Merge branch 'master'

arch/powerpc/kernel/ioctl32.c

@@ -40,10 +40,6 @@ IOCTL_TABLE_START
 #define DECLARES
 #include "compat_ioctl.c"
 
-/* Little p (/dev/rtc, /dev/envctrl, etc.) */
-COMPATIBLE_IOCTL(_IOR('p', 20, int[7])) /* RTCGET */
-COMPATIBLE_IOCTL(_IOW('p', 21, int[7])) /* RTCSET */
-
 IOCTL_TABLE_END
 
 int ioctl_table_size = ARRAY_SIZE(ioctl_start);

arch/sparc64/kernel/ioctl32.c

@@ -12,86 +12,10 @@
 #define INCLUDES
 #include "compat_ioctl.c"
 #include <linux/syscalls.h>
-#include <asm/fbio.h>
-
-/* Use this to get at 32-bit user passed pointers. 
- * See sys_sparc32.c for description about it.
- */
-#define A(__x) compat_ptr(__x)
 
 #define CODE
 #include "compat_ioctl.c"
 
-struct  fbcmap32 {
-	int             index;          /* first element (0 origin) */
-	int             count;
-	u32		red;
-	u32		green;
-	u32		blue;
-};
-
-#define FBIOPUTCMAP32	_IOW('F', 3, struct fbcmap32)
-#define FBIOGETCMAP32	_IOW('F', 4, struct fbcmap32)
-
-static int fbiogetputcmap(unsigned int fd, unsigned int cmd, unsigned long arg)
-{
-	struct fbcmap32 __user *argp = (void __user *)arg;
-	struct fbcmap __user *p = compat_alloc_user_space(sizeof(*p));
-	u32 addr;
-	int ret;
-
-	ret = copy_in_user(p, argp, 2 * sizeof(int));
-	ret |= get_user(addr, &argp->red);
-	ret |= put_user(compat_ptr(addr), &p->red);
-	ret |= get_user(addr, &argp->green);
-	ret |= put_user(compat_ptr(addr), &p->green);
-	ret |= get_user(addr, &argp->blue);
-	ret |= put_user(compat_ptr(addr), &p->blue);
-	if (ret)
-		return -EFAULT;
-	return sys_ioctl(fd, (cmd == FBIOPUTCMAP32) ? FBIOPUTCMAP_SPARC : FBIOGETCMAP_SPARC, (unsigned long)p);
-}
-
-struct fbcursor32 {
-	short set;		/* what to set, choose from the list above */
-	short enable;		/* cursor on/off */
-	struct fbcurpos pos;	/* cursor position */
-	struct fbcurpos hot;	/* cursor hot spot */
-	struct fbcmap32 cmap;	/* color map info */
-	struct fbcurpos size;	/* cursor bit map size */
-	u32	image;		/* cursor image bits */
-	u32	mask;		/* cursor mask bits */
-};
-
-#define FBIOSCURSOR32	_IOW('F', 24, struct fbcursor32)
-#define FBIOGCURSOR32	_IOW('F', 25, struct fbcursor32)
-
-static int fbiogscursor(unsigned int fd, unsigned int cmd, unsigned long arg)
-{
-	struct fbcursor __user *p = compat_alloc_user_space(sizeof(*p));
-	struct fbcursor32 __user *argp =  (void __user *)arg;
-	compat_uptr_t addr;
-	int ret;
-
-	ret = copy_in_user(p, argp,
-			      2 * sizeof (short) + 2 * sizeof(struct fbcurpos));
-	ret |= copy_in_user(&p->size, &argp->size, sizeof(struct fbcurpos));
-	ret |= copy_in_user(&p->cmap, &argp->cmap, 2 * sizeof(int));
-	ret |= get_user(addr, &argp->cmap.red);
-	ret |= put_user(compat_ptr(addr), &p->cmap.red);
-	ret |= get_user(addr, &argp->cmap.green);
-	ret |= put_user(compat_ptr(addr), &p->cmap.green);
-	ret |= get_user(addr, &argp->cmap.blue);
-	ret |= put_user(compat_ptr(addr), &p->cmap.blue);
-	ret |= get_user(addr, &argp->mask);
-	ret |= put_user(compat_ptr(addr), &p->mask);
-	ret |= get_user(addr, &argp->image);
-	ret |= put_user(compat_ptr(addr), &p->image);
-	if (ret)
-		return -EFAULT;
-	return sys_ioctl (fd, FBIOSCURSOR, (unsigned long)p);
-}
-
 #define COMPATIBLE_IOCTL(cmd)		HANDLE_IOCTL((cmd),sys_ioctl)
 #define HANDLE_IOCTL(cmd,handler)	{ (cmd), (ioctl_trans_handler_t)(handler), NULL },
 #define IOCTL_TABLE_START \
@@ -103,22 +27,6 @@ IOCTL_TABLE_START
 #include <linux/compat_ioctl.h>
 #define DECLARES
 #include "compat_ioctl.c"
-COMPATIBLE_IOCTL(FBIOGTYPE)
-COMPATIBLE_IOCTL(FBIOSATTR)
-COMPATIBLE_IOCTL(FBIOGATTR)
-COMPATIBLE_IOCTL(FBIOSVIDEO)
-COMPATIBLE_IOCTL(FBIOGVIDEO)
-COMPATIBLE_IOCTL(FBIOGCURSOR32)  /* This is not implemented yet. Later it should be converted... */
-COMPATIBLE_IOCTL(FBIOSCURPOS)
-COMPATIBLE_IOCTL(FBIOGCURPOS)
-COMPATIBLE_IOCTL(FBIOGCURMAX)
-/* Little k */
-/* Little v, the video4linux ioctls */
-/* And these ioctls need translation */
-/* Note SIOCRTMSG is no longer, so this is safe and * the user would have seen just an -EINVAL anyways. */
-HANDLE_IOCTL(FBIOPUTCMAP32, fbiogetputcmap)
-HANDLE_IOCTL(FBIOGETCMAP32, fbiogetputcmap)
-HANDLE_IOCTL(FBIOSCURSOR32, fbiogscursor)
 #if 0
 HANDLE_IOCTL(RTC32_IRQP_READ, do_rtc_ioctl)
 HANDLE_IOCTL(RTC32_IRQP_SET, do_rtc_ioctl)

block/cfq-iosched.c

@@ -861,8 +861,8 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 	 * store what was left of this slice, if the queue idled out
 	 * or was preempted
 	 */
-	if (time_after(now, cfqq->slice_end))
-		cfqq->slice_left = now - cfqq->slice_end;
+	if (time_after(cfqq->slice_end, now))
+		cfqq->slice_left = cfqq->slice_end - now;
 	else
 		cfqq->slice_left = 0;
 
@@ -999,7 +999,7 @@ cfq_prio_to_maxrq(struct cfq_data *cfqd, struct cfq_queue *cfqq)
 /*
  * get next queue for service
  */
-static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd, int force)
+static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd)
 {
 	unsigned long now = jiffies;
 	struct cfq_queue *cfqq;
@@ -1023,7 +1023,7 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd, int force)
 	 */
 	if (!RB_EMPTY(&cfqq->sort_list))
 		goto keep_queue;
-	else if (!force && cfq_cfqq_class_sync(cfqq) &&
+	else if (cfq_cfqq_class_sync(cfqq) &&
 		 time_before(now, cfqq->slice_end)) {
 		if (cfq_arm_slice_timer(cfqd, cfqq))
 			return NULL;
@@ -1091,6 +1091,42 @@ __cfq_dispatch_requests(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 	return dispatched;
 }
 
+static int
+cfq_forced_dispatch_cfqqs(struct list_head *list)
+{
+	int dispatched = 0;
+	struct cfq_queue *cfqq, *next;
+	struct cfq_rq *crq;
+
+	list_for_each_entry_safe(cfqq, next, list, cfq_list) {
+		while ((crq = cfqq->next_crq)) {
+			cfq_dispatch_insert(cfqq->cfqd->queue, crq);
+			dispatched++;
+		}
+		BUG_ON(!list_empty(&cfqq->fifo));
+	}
+	return dispatched;
+}
+
+static int
+cfq_forced_dispatch(struct cfq_data *cfqd)
+{
+	int i, dispatched = 0;
+
+	for (i = 0; i < CFQ_PRIO_LISTS; i++)
+		dispatched += cfq_forced_dispatch_cfqqs(&cfqd->rr_list[i]);
+
+	dispatched += cfq_forced_dispatch_cfqqs(&cfqd->busy_rr);
+	dispatched += cfq_forced_dispatch_cfqqs(&cfqd->cur_rr);
+	dispatched += cfq_forced_dispatch_cfqqs(&cfqd->idle_rr);
+
+	cfq_slice_expired(cfqd, 0);
+
+	BUG_ON(cfqd->busy_queues);
+
+	return dispatched;
+}
+
 static int
 cfq_dispatch_requests(request_queue_t *q, int force)
 {
@@ -1100,7 +1136,10 @@ cfq_dispatch_requests(request_queue_t *q, int force)
 	if (!cfqd->busy_queues)
 		return 0;
 
-	cfqq = cfq_select_queue(cfqd, force);
+	if (unlikely(force))
+		return cfq_forced_dispatch(cfqd);
+
+	cfqq = cfq_select_queue(cfqd);
 	if (cfqq) {
 		int max_dispatch;
 
@@ -1115,12 +1154,9 @@ cfq_dispatch_requests(request_queue_t *q, int force)
 		cfq_clear_cfqq_wait_request(cfqq);
 		del_timer(&cfqd->idle_slice_timer);
 
-		if (!force) {
-			max_dispatch = cfqd->cfq_quantum;
-			if (cfq_class_idle(cfqq))
-				max_dispatch = 1;
-		} else
-			max_dispatch = INT_MAX;
+		max_dispatch = cfqd->cfq_quantum;
+		if (cfq_class_idle(cfqq))
+			max_dispatch = 1;
 
 		return __cfq_dispatch_requests(cfqd, cfqq, max_dispatch);
 	}

block/elevator.c

@@ -155,9 +155,10 @@ static void elevator_setup_default(void)
  	/*
  	 * If the given scheduler is not available, fall back to no-op.
  	 */
- 	if (!(e = elevator_find(chosen_elevator)))
+ 	if ((e = elevator_find(chosen_elevator)))
+		elevator_put(e);
+	else
  		strcpy(chosen_elevator, "noop");
-	elevator_put(e);
 }
 
 static int __init elevator_setup(char *str)
@@ -190,14 +191,14 @@ int elevator_init(request_queue_t *q, char *name)
 
 	eq = kmalloc(sizeof(struct elevator_queue), GFP_KERNEL);
 	if (!eq) {
-		elevator_put(e->elevator_type);
+		elevator_put(e);
 		return -ENOMEM;
 	}
 
 	ret = elevator_attach(q, e, eq);
 	if (ret) {
 		kfree(eq);
-		elevator_put(e->elevator_type);
+		elevator_put(e);
 	}
 
 	return ret;
@@ -225,6 +226,7 @@ void elv_dispatch_sort(request_queue_t *q, struct request *rq)
 
 	if (q->last_merge == rq)
 		q->last_merge = NULL;
+	q->nr_sorted--;
 
 	boundary = q->end_sector;
 
@@ -283,6 +285,7 @@ void elv_merge_requests(request_queue_t *q, struct request *rq,
 
 	if (e->ops->elevator_merge_req_fn)
 		e->ops->elevator_merge_req_fn(q, rq, next);
+	q->nr_sorted--;
 
 	q->last_merge = rq;
 }
@@ -314,6 +317,20 @@ void elv_requeue_request(request_queue_t *q, struct request *rq)
 	__elv_add_request(q, rq, ELEVATOR_INSERT_FRONT, 0);
 }
 
+static void elv_drain_elevator(request_queue_t *q)
+{
+	static int printed;
+	while (q->elevator->ops->elevator_dispatch_fn(q, 1))
+		;
+	if (q->nr_sorted == 0)
+		return;
+	if (printed++ < 10) {
+		printk(KERN_ERR "%s: forced dispatching is broken "
+		       "(nr_sorted=%u), please report this\n",
+		       q->elevator->elevator_type->elevator_name, q->nr_sorted);
+	}
+}
+
 void __elv_add_request(request_queue_t *q, struct request *rq, int where,
 		       int plug)
 {
@@ -348,9 +365,7 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where,
 
 	case ELEVATOR_INSERT_BACK:
 		rq->flags |= REQ_SOFTBARRIER;
-
-		while (q->elevator->ops->elevator_dispatch_fn(q, 1))
-			;
+		elv_drain_elevator(q);
 		list_add_tail(&rq->queuelist, &q->queue_head);
 		/*
 		 * We kick the queue here for the following reasons.
@@ -369,6 +384,7 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where,
 	case ELEVATOR_INSERT_SORT:
 		BUG_ON(!blk_fs_request(rq));
 		rq->flags |= REQ_SORTED;
+		q->nr_sorted++;
 		if (q->last_merge == NULL && rq_mergeable(rq))
 			q->last_merge = rq;
 		/*
@@ -525,33 +541,19 @@ int elv_queue_empty(request_queue_t *q)
 
 struct request *elv_latter_request(request_queue_t *q, struct request *rq)
 {
-	struct list_head *next;
-
 	elevator_t *e = q->elevator;
 
 	if (e->ops->elevator_latter_req_fn)
 		return e->ops->elevator_latter_req_fn(q, rq);
-
-	next = rq->queuelist.next;
-	if (next != &q->queue_head && next != &rq->queuelist)
-		return list_entry_rq(next);
-
 	return NULL;
 }
 
 struct request *elv_former_request(request_queue_t *q, struct request *rq)
 {
-	struct list_head *prev;
-
 	elevator_t *e = q->elevator;
 
 	if (e->ops->elevator_former_req_fn)
 		return e->ops->elevator_former_req_fn(q, rq);
-
-	prev = rq->queuelist.prev;
-	if (prev != &q->queue_head && prev != &rq->queuelist)
-		return list_entry_rq(prev);
-
 	return NULL;
 }
 
@@ -691,13 +693,15 @@ static void elevator_switch(request_queue_t *q, struct elevator_type *new_e)
 
 	set_bit(QUEUE_FLAG_ELVSWITCH, &q->queue_flags);
 
-	while (q->elevator->ops->elevator_dispatch_fn(q, 1))
-		;
+	elv_drain_elevator(q);
 
 	while (q->rq.elvpriv) {
+		blk_remove_plug(q);
+		q->request_fn(q);
 		spin_unlock_irq(q->queue_lock);
 		msleep(10);
 		spin_lock_irq(q->queue_lock);
+		elv_drain_elevator(q);
 	}
 
 	spin_unlock_irq(q->queue_lock);
@@ -744,13 +748,15 @@ static void elevator_switch(request_queue_t *q, struct elevator_type *new_e)
 ssize_t elv_iosched_store(request_queue_t *q, const char *name, size_t count)
 {
 	char elevator_name[ELV_NAME_MAX];
+	size_t len;
 	struct elevator_type *e;
 
-	memset(elevator_name, 0, sizeof(elevator_name));
-	strncpy(elevator_name, name, sizeof(elevator_name));
+	elevator_name[sizeof(elevator_name) - 1] = '\0';
+	strncpy(elevator_name, name, sizeof(elevator_name) - 1);
+	len = strlen(elevator_name);
 
-	if (elevator_name[strlen(elevator_name) - 1] == '\n')
-		elevator_name[strlen(elevator_name) - 1] = '\0';
+	if (len && elevator_name[len - 1] == '\n')
+		elevator_name[len - 1] = '\0';
 
 	e = elevator_get(elevator_name);
 	if (!e) {

block/genhd.c

@@ -391,12 +391,14 @@ static ssize_t disk_stats_read(struct gendisk * disk, char *page)
 		"%8u %8u %8llu %8u "
 		"%8u %8u %8u"
 		"\n",
-		disk_stat_read(disk, ios[0]), disk_stat_read(disk, merges[0]),
-		(unsigned long long)disk_stat_read(disk, sectors[0]),
-		jiffies_to_msecs(disk_stat_read(disk, ticks[0])),
-		disk_stat_read(disk, ios[1]), disk_stat_read(disk, merges[1]),
-		(unsigned long long)disk_stat_read(disk, sectors[1]),
-		jiffies_to_msecs(disk_stat_read(disk, ticks[1])),
+		disk_stat_read(disk, ios[READ]),
+		disk_stat_read(disk, merges[READ]),
+		(unsigned long long)disk_stat_read(disk, sectors[READ]),
+		jiffies_to_msecs(disk_stat_read(disk, ticks[READ])),
+		disk_stat_read(disk, ios[WRITE]),
+		disk_stat_read(disk, merges[WRITE]),
+		(unsigned long long)disk_stat_read(disk, sectors[WRITE]),
+		jiffies_to_msecs(disk_stat_read(disk, ticks[WRITE])),
 		disk->in_flight,
 		jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
 		jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));