---

yaml
---
r: 17111
b: refs/heads/master
c: 8b78e83
h: refs/heads/master
i:
  17109: 453f062
  17107: 7c11115
  17103: ab69bec
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b887030aec0971a47ca97a18e93ff446bc7d049e
+refs/heads/master: 8b78e83bfbc12f7e9bdefd400abdfde9e6c9ac51

trunk/Documentation/networking/bonding.txt

@@ -945,15 +945,13 @@ bond0     Link encap:Ethernet  HWaddr 00:C0:F0:1F:37:B4
           collisions:0 txqueuelen:0
 
 eth0      Link encap:Ethernet  HWaddr 00:C0:F0:1F:37:B4
-          inet addr:XXX.XXX.XXX.YYY  Bcast:XXX.XXX.XXX.255  Mask:255.255.252.0
           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
           RX packets:3573025 errors:0 dropped:0 overruns:0 frame:0
           TX packets:1643167 errors:1 dropped:0 overruns:1 carrier:0
           collisions:0 txqueuelen:100
           Interrupt:10 Base address:0x1080
 
 eth1      Link encap:Ethernet  HWaddr 00:C0:F0:1F:37:B4
-          inet addr:XXX.XXX.XXX.YYY  Bcast:XXX.XXX.XXX.255  Mask:255.255.252.0
           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
           RX packets:3651769 errors:0 dropped:0 overruns:0 frame:0
           TX packets:1643480 errors:0 dropped:0 overruns:0 carrier:0

trunk/MAINTAINERS

@@ -1697,7 +1697,6 @@ S: Maintained
 
 MARVELL MV64340 ETHERNET DRIVER
 P:	Manish Lachwani
-M:	Manish_Lachwani@pmc-sierra.com
 L:	linux-mips@linux-mips.org
 L:	netdev@vger.kernel.org
 S:	Supported

trunk/block/elevator.c

@@ -64,7 +64,7 @@ inline int elv_rq_merge_ok(struct request *rq, struct bio *bio)
 }
 EXPORT_SYMBOL(elv_rq_merge_ok);
 
-inline int elv_try_merge(struct request *__rq, struct bio *bio)
+static inline int elv_try_merge(struct request *__rq, struct bio *bio)
 {
 	int ret = ELEVATOR_NO_MERGE;
 
@@ -80,7 +80,6 @@ inline int elv_try_merge(struct request *__rq, struct bio *bio)
 
 	return ret;
 }
-EXPORT_SYMBOL(elv_try_merge);
 
 static struct elevator_type *elevator_find(const char *name)
 {

trunk/block/ll_rw_blk.c

@@ -26,7 +26,8 @@
 #include <linux/slab.h>
 #include <linux/swap.h>
 #include <linux/writeback.h>
-#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/cpu.h>
 
 /*
  * for max sense size
@@ -62,13 +63,15 @@ static wait_queue_head_t congestion_wqh[2] = {
 /*
  * Controlling structure to kblockd
  */
-static struct workqueue_struct *kblockd_workqueue; 
+static struct workqueue_struct *kblockd_workqueue;
 
 unsigned long blk_max_low_pfn, blk_max_pfn;
 
 EXPORT_SYMBOL(blk_max_low_pfn);
 EXPORT_SYMBOL(blk_max_pfn);
 
+static DEFINE_PER_CPU(struct list_head, blk_cpu_done);
+
 /* Amount of time in which a process may batch requests */
 #define BLK_BATCH_TIME	(HZ/50UL)
 
@@ -207,6 +210,13 @@ void blk_queue_merge_bvec(request_queue_t *q, merge_bvec_fn *mbfn)
 
 EXPORT_SYMBOL(blk_queue_merge_bvec);
 
+void blk_queue_softirq_done(request_queue_t *q, softirq_done_fn *fn)
+{
+	q->softirq_done_fn = fn;
+}
+
+EXPORT_SYMBOL(blk_queue_softirq_done);
+
 /**
  * blk_queue_make_request - define an alternate make_request function for a device
  * @q:  the request queue for the device to be affected
@@ -270,6 +280,7 @@ EXPORT_SYMBOL(blk_queue_make_request);
 static inline void rq_init(request_queue_t *q, struct request *rq)
 {
 	INIT_LIST_HEAD(&rq->queuelist);
+	INIT_LIST_HEAD(&rq->donelist);
 
 	rq->errors = 0;
 	rq->rq_status = RQ_ACTIVE;
@@ -286,6 +297,7 @@ static inline void rq_init(request_queue_t *q, struct request *rq)
 	rq->sense = NULL;
 	rq->end_io = NULL;
 	rq->end_io_data = NULL;
+	rq->completion_data = NULL;
 }
 
 /**
@@ -2735,30 +2747,6 @@ static inline int attempt_front_merge(request_queue_t *q, struct request *rq)
 	return 0;
 }
 
-/**
- * blk_attempt_remerge  - attempt to remerge active head with next request
- * @q:    The &request_queue_t belonging to the device
- * @rq:   The head request (usually)
- *
- * Description:
- *    For head-active devices, the queue can easily be unplugged so quickly
- *    that proper merging is not done on the front request. This may hurt
- *    performance greatly for some devices. The block layer cannot safely
- *    do merging on that first request for these queues, but the driver can
- *    call this function and make it happen any way. Only the driver knows
- *    when it is safe to do so.
- **/
-void blk_attempt_remerge(request_queue_t *q, struct request *rq)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(q->queue_lock, flags);
-	attempt_back_merge(q, rq);
-	spin_unlock_irqrestore(q->queue_lock, flags);
-}
-
-EXPORT_SYMBOL(blk_attempt_remerge);
-
 static void init_request_from_bio(struct request *req, struct bio *bio)
 {
 	req->flags |= REQ_CMD;
@@ -3286,6 +3274,87 @@ int end_that_request_chunk(struct request *req, int uptodate, int nr_bytes)
 
 EXPORT_SYMBOL(end_that_request_chunk);
 
+/*
+ * splice the completion data to a local structure and hand off to
+ * process_completion_queue() to complete the requests
+ */
+static void blk_done_softirq(struct softirq_action *h)
+{
+	struct list_head *cpu_list;
+	LIST_HEAD(local_list);
+
+	local_irq_disable();
+	cpu_list = &__get_cpu_var(blk_cpu_done);
+	list_splice_init(cpu_list, &local_list);
+	local_irq_enable();
+
+	while (!list_empty(&local_list)) {
+		struct request *rq = list_entry(local_list.next, struct request, donelist);
+
+		list_del_init(&rq->donelist);
+		rq->q->softirq_done_fn(rq);
+	}
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+
+static int blk_cpu_notify(struct notifier_block *self, unsigned long action,
+			  void *hcpu)
+{
+	/*
+	 * If a CPU goes away, splice its entries to the current CPU
+	 * and trigger a run of the softirq
+	 */
+	if (action == CPU_DEAD) {
+		int cpu = (unsigned long) hcpu;
+
+		local_irq_disable();
+		list_splice_init(&per_cpu(blk_cpu_done, cpu),
+				 &__get_cpu_var(blk_cpu_done));
+		raise_softirq_irqoff(BLOCK_SOFTIRQ);
+		local_irq_enable();
+	}
+
+	return NOTIFY_OK;
+}
+
+
+static struct notifier_block __devinitdata blk_cpu_notifier = {
+	.notifier_call	= blk_cpu_notify,
+};
+
+#endif /* CONFIG_HOTPLUG_CPU */
+
+/**
+ * blk_complete_request - end I/O on a request
+ * @req:      the request being processed
+ *
+ * Description:
+ *     Ends all I/O on a request. It does not handle partial completions,
+ *     unless the driver actually implements this in its completionc callback
+ *     through requeueing. Theh actual completion happens out-of-order,
+ *     through a softirq handler. The user must have registered a completion
+ *     callback through blk_queue_softirq_done().
+ **/
+
+void blk_complete_request(struct request *req)
+{
+	struct list_head *cpu_list;
+	unsigned long flags;
+
+	BUG_ON(!req->q->softirq_done_fn);
+
+	local_irq_save(flags);
+
+	cpu_list = &__get_cpu_var(blk_cpu_done);
+	list_add_tail(&req->donelist, cpu_list);
+	raise_softirq_irqoff(BLOCK_SOFTIRQ);
+
+	local_irq_restore(flags);
+}
+
+EXPORT_SYMBOL(blk_complete_request);
+
 /*
  * queue lock must be held
  */
@@ -3364,6 +3433,8 @@ EXPORT_SYMBOL(kblockd_flush);
 
 int __init blk_dev_init(void)
 {
+	int i;
+
 	kblockd_workqueue = create_workqueue("kblockd");
 	if (!kblockd_workqueue)
 		panic("Failed to create kblockd\n");
@@ -3377,6 +3448,14 @@ int __init blk_dev_init(void)
 	iocontext_cachep = kmem_cache_create("blkdev_ioc",
 			sizeof(struct io_context), 0, SLAB_PANIC, NULL, NULL);
 
+	for (i = 0; i < NR_CPUS; i++)
+		INIT_LIST_HEAD(&per_cpu(blk_cpu_done, i));
+
+	open_softirq(BLOCK_SOFTIRQ, blk_done_softirq, NULL);
+#ifdef CONFIG_HOTPLUG_CPU
+	register_cpu_notifier(&blk_cpu_notifier);
+#endif
+
 	blk_max_low_pfn = max_low_pfn;
 	blk_max_pfn = max_pfn;
 

trunk/block/scsi_ioctl.c

@@ -190,16 +190,21 @@ static int verify_command(struct file *file, unsigned char *cmd)
 		safe_for_write(GPCMD_SET_STREAMING),
 	};
 	unsigned char type = cmd_type[cmd[0]];
+	int has_write_perm = 0;
 
 	/* Anybody who can open the device can do a read-safe command */
 	if (type & CMD_READ_SAFE)
 		return 0;
 
+	/*
+	 * file can be NULL from ioctl_by_bdev()...
+	 */
+	if (file)
+		has_write_perm = file->f_mode & FMODE_WRITE;
+
 	/* Write-safe commands just require a writable open.. */
-	if (type & CMD_WRITE_SAFE) {
-		if (file->f_mode & FMODE_WRITE)
-			return 0;
-	}
+	if ((type & CMD_WRITE_SAFE) && has_write_perm)
+		return 0;
 
 	/* And root can do any command.. */
 	if (capable(CAP_SYS_RAWIO))

trunk/drivers/block/cciss.c

@@ -2178,16 +2178,48 @@ static inline void resend_cciss_cmd( ctlr_info_t *h, CommandList_struct *c)
 
 	start_io(h);
 }
+
+static void cciss_softirq_done(struct request *rq)
+{
+	CommandList_struct *cmd = rq->completion_data;
+	ctlr_info_t *h = hba[cmd->ctlr];
+	u64bit temp64;
+	int i, ddir;
+
+	if (cmd->Request.Type.Direction == XFER_READ)
+		ddir = PCI_DMA_FROMDEVICE;
+	else
+		ddir = PCI_DMA_TODEVICE;
+
+	/* command did not need to be retried */
+	/* unmap the DMA mapping for all the scatter gather elements */
+	for(i=0; i<cmd->Header.SGList; i++) {
+		temp64.val32.lower = cmd->SG[i].Addr.lower;
+		temp64.val32.upper = cmd->SG[i].Addr.upper;
+		pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
+	}
+
+	complete_buffers(rq->bio, rq->errors);
+
+#ifdef CCISS_DEBUG
+	printk("Done with %p\n", rq);
+#endif /* CCISS_DEBUG */ 
+
+	spin_lock_irq(&h->lock);
+	end_that_request_last(rq, rq->errors);
+	cmd_free(h, cmd,1);
+	spin_unlock_irq(&h->lock);
+}
+
 /* checks the status of the job and calls complete buffers to mark all 
- * buffers for the completed job. 
+ * buffers for the completed job. Note that this function does not need
+ * to hold the hba/queue lock.
  */ 
 static inline void complete_command( ctlr_info_t *h, CommandList_struct *cmd,
 		int timeout)
 {
 	int status = 1;
-	int i;
 	int retry_cmd = 0;
-	u64bit temp64;
 
 	if (timeout)
 		status = 0; 
@@ -2295,24 +2327,10 @@ static inline void complete_command( ctlr_info_t *h, CommandList_struct *cmd,
 		resend_cciss_cmd(h,cmd);
 		return;
 	}	
-	/* command did not need to be retried */
-	/* unmap the DMA mapping for all the scatter gather elements */
-	for(i=0; i<cmd->Header.SGList; i++) {
-		temp64.val32.lower = cmd->SG[i].Addr.lower;
-		temp64.val32.upper = cmd->SG[i].Addr.upper;
-		pci_unmap_page(hba[cmd->ctlr]->pdev,
-			temp64.val, cmd->SG[i].Len,
-			(cmd->Request.Type.Direction == XFER_READ) ?
-				PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
-	}
-	complete_buffers(cmd->rq->bio, status);
-
-#ifdef CCISS_DEBUG
-	printk("Done with %p\n", cmd->rq);
-#endif /* CCISS_DEBUG */ 
 
-	end_that_request_last(cmd->rq, status ? 1 : -EIO);
-	cmd_free(h,cmd,1);
+	cmd->rq->completion_data = cmd;
+	cmd->rq->errors = status;
+	blk_complete_request(cmd->rq);
 }
 
 /* 
@@ -3199,15 +3217,17 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 		drv->queue = q;
 
 		q->backing_dev_info.ra_pages = READ_AHEAD;
-	blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);
+		blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);
+
+		/* This is a hardware imposed limit. */
+		blk_queue_max_hw_segments(q, MAXSGENTRIES);
 
-	/* This is a hardware imposed limit. */
-	blk_queue_max_hw_segments(q, MAXSGENTRIES);
+		/* This is a limit in the driver and could be eliminated. */
+		blk_queue_max_phys_segments(q, MAXSGENTRIES);
 
-	/* This is a limit in the driver and could be eliminated. */
-	blk_queue_max_phys_segments(q, MAXSGENTRIES);
+		blk_queue_max_sectors(q, 512);
 
-	blk_queue_max_sectors(q, 512);
+		blk_queue_softirq_done(q, cciss_softirq_done);
 
 		q->queuedata = hba[i];
 		sprintf(disk->disk_name, "cciss/c%dd%d", i, j);

trunk/drivers/ide/ide-cd.c

@@ -1332,8 +1332,6 @@ static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block)
 	if (cdrom_read_from_buffer(drive))
 		return ide_stopped;
 
-	blk_attempt_remerge(drive->queue, rq);
-
 	/* Clear the local sector buffer. */
 	info->nsectors_buffered = 0;
 
@@ -1874,14 +1872,6 @@ static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
 		return ide_stopped;
 	}
 
-	/*
-	 * for dvd-ram and such media, it's a really big deal to get
-	 * big writes all the time. so scour the queue and attempt to
-	 * remerge requests, often the plugging will not have had time
-	 * to do this properly
-	 */
-	blk_attempt_remerge(drive->queue, rq);
-
 	info->nsectors_buffered = 0;
 
 	/* use dma, if possible. we don't need to check more, since we