11 files changed, 39 insertions, 36 deletions

diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt
index 8e63831971d5..f989a9e839b4 100644
--- a/Documentation/block/biodoc.txt
+++ b/Documentation/block/biodoc.txt
@@ -132,8 +132,18 @@ Some new queue property settings:
                 limit. No highmem default.
 
         blk_queue_max_sectors(q, max_sectors)
-                Maximum size request you can handle in units of 512 byte
-                sectors. 255 default.
+                Sets two variables that limit the size of the request.
+
+                - The request queue's max_sectors, which is a soft size in
+                in units of 512 byte sectors, and could be dynamically varied
+                by the core kernel.
+
+                - The request queue's max_hw_sectors, which is a hard limit
+                and reflects the maximum size request a driver can handle
+                in units of 512 byte sectors.
+
+                The default for both max_sectors and max_hw_sectors is
+                255. The upper limit of max_sectors is 1024.
 
         blk_queue_max_phys_segments(q, max_segments)
                 Maximum physical segments you can handle in a request. 128
diff --git a/block/Kconfig b/block/Kconfig
index 43ca070dc0f8..5536839886ff 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -13,6 +13,7 @@ config LBD
 
 config BLK_DEV_IO_TRACE
         bool "Support for tracing block io actions"
+        depends on SYSFS
         select RELAY
         select DEBUG_FS
         help
diff --git a/block/genhd.c b/block/genhd.c
index 64510fd88621..db4c60c802d6 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -454,8 +454,8 @@ static ssize_t disk_stats_read(struct gendisk * disk, char *page)
         disk_round_stats(disk);
         preempt_enable();
         return sprintf(page,
-                "%8u %8u %8llu %8u "
-                "%8u %8u %8llu %8u "
+                "%8lu %8lu %8llu %8u "
+                "%8lu %8lu %8llu %8u "
                 "%8u %8u %8u"
                 "\n",
                 disk_stat_read(disk, ios[READ]),
@@ -649,7 +649,7 @@ static int diskstats_show(struct seq_file *s, void *v)
         preempt_disable();
         disk_round_stats(gp);
         preempt_enable();
-        seq_printf(s, "%4d %4d %s %u %u %llu %u %u %u %llu %u %u %u %u\n",
+        seq_printf(s, "%4d %4d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n",
                 gp->major, n + gp->first_minor, disk_name(gp, n, buf),
                 disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
                 (unsigned long long)disk_stat_read(gp, sectors[0]),
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index a2e333ad0b64..82469db25100 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -908,17 +908,15 @@ init_tag_map(request_queue_t *q, struct blk_queue_tag *tags, int depth)
                                 __FUNCTION__, depth);
         }
 
-        tag_index = kmalloc(depth * sizeof(struct request *), GFP_ATOMIC);
+        tag_index = kzalloc(depth * sizeof(struct request *), GFP_ATOMIC);
         if (!tag_index)
                 goto fail;
 
         nr_ulongs = ALIGN(depth, BITS_PER_LONG) / BITS_PER_LONG;
-        tag_map = kmalloc(nr_ulongs * sizeof(unsigned long), GFP_ATOMIC);
+        tag_map = kzalloc(nr_ulongs * sizeof(unsigned long), GFP_ATOMIC);
         if (!tag_map)
                 goto fail;
 
-        memset(tag_index, 0, depth * sizeof(struct request *));
-        memset(tag_map, 0, nr_ulongs * sizeof(unsigned long));
         tags->real_max_depth = depth;
         tags->max_depth = depth;
         tags->tag_index = tag_index;
@@ -2481,10 +2479,12 @@ void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
         rq->rq_disk = bd_disk;
         rq->flags |= REQ_NOMERGE;
         rq->end_io = done;
-        elv_add_request(q, rq, where, 1);
-        generic_unplug_device(q);
+        WARN_ON(irqs_disabled());
+        spin_lock_irq(q->queue_lock);
+        __elv_add_request(q, rq, where, 1);
+        __generic_unplug_device(q);
+        spin_unlock_irq(q->queue_lock);
 }
-
 EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
 
 /**
diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 9bdea2a5cf0e..49c7cd558ddf 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -311,11 +311,10 @@ static boolean DAC960_CreateAuxiliaryStructures(DAC960_Controller_T *Controller)
                 CommandsRemaining = CommandAllocationGroupSize;
           CommandGroupByteCount =
                 CommandsRemaining * CommandAllocationLength;
-          AllocationPointer = kmalloc(CommandGroupByteCount, GFP_ATOMIC);
+          AllocationPointer = kzalloc(CommandGroupByteCount, GFP_ATOMIC);
           if (AllocationPointer == NULL)
                 return DAC960_Failure(Controller,
                                         "AUXILIARY STRUCTURE CREATION");
-          memset(AllocationPointer, 0, CommandGroupByteCount);
          }
       Command = (DAC960_Command_T *) AllocationPointer;
       AllocationPointer += CommandAllocationLength;
@@ -2709,14 +2708,12 @@ DAC960_DetectController(struct pci_dev *PCI_Device,
   void __iomem *BaseAddress;
   int i;
 
-  Controller = (DAC960_Controller_T *)
-        kmalloc(sizeof(DAC960_Controller_T), GFP_ATOMIC);
+  Controller = kzalloc(sizeof(DAC960_Controller_T), GFP_ATOMIC);
   if (Controller == NULL) {
         DAC960_Error("Unable to allocate Controller structure for "
                        "Controller at\n", NULL);
         return NULL;
   }
-  memset(Controller, 0, sizeof(DAC960_Controller_T));
   Controller->ControllerNumber = DAC960_ControllerCount;
   DAC960_Controllers[DAC960_ControllerCount++] = Controller;
   Controller->Bus = PCI_Device->bus->number;
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 71ec9e664383..1b0fd31c57c3 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -996,13 +996,11 @@ static int cciss_ioctl(struct inode *inode, struct file *filep,
                         status = -EINVAL;
                         goto cleanup1;
                 }
-                buff = (unsigned char **) kmalloc(MAXSGENTRIES * 
-                                sizeof(char *), GFP_KERNEL);
+                buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
                 if (!buff) {
                         status = -ENOMEM;
                         goto cleanup1;
                 }
-                memset(buff, 0, MAXSGENTRIES);
                 buff_size = (int *) kmalloc(MAXSGENTRIES * sizeof(int), 
                                         GFP_KERNEL);
                 if (!buff_size) {
@@ -2729,9 +2727,9 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c, struct pci_dev *pdev,
                         return;
                 }
         }
+default_int_mode:
 #endif /* CONFIG_PCI_MSI */
         /* if we get here we're going to use the default interrupt mode */
-default_int_mode:
         c->intr[SIMPLE_MODE_INT] = pdev->irq;
         return;
 }
@@ -2940,13 +2938,12 @@ static void cciss_getgeometry(int cntl_num)
         int block_size;
         int total_size; 
 
-        ld_buff = kmalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
+        ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
         if (ld_buff == NULL)
         {
                 printk(KERN_ERR "cciss: out of memory\n");
                 return;
         }
-        memset(ld_buff, 0, sizeof(ReportLunData_struct));
         size_buff = kmalloc(sizeof( ReadCapdata_struct), GFP_KERNEL);
         if (size_buff == NULL)
         {
@@ -3060,10 +3057,9 @@ static int alloc_cciss_hba(void)
         for(i=0; i< MAX_CTLR; i++) {
                 if (!hba[i]) {
                         ctlr_info_t *p;
-                        p = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
+                        p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
                         if (!p)
                                 goto Enomem;
-                        memset(p, 0, sizeof(ctlr_info_t));
                         for (n = 0; n < NWD; n++)
                                 p->gendisk[n] = disk[n];
                         hba[i] = p;
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 0e66e904bd8c..597c007fe81b 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -1027,12 +1027,11 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
         int i;
 
         c = (ctlr_info_t *) hba[cntl_num];      
-        ld_buff = kmalloc(reportlunsize, GFP_KERNEL);
+        ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
         if (ld_buff == NULL) {
                 printk(KERN_ERR "cciss: out of memory\n");
                 return;
         }
-        memset(ld_buff, 0, reportlunsize);
         inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
         if (inq_buff == NULL) {
                 printk(KERN_ERR "cciss: out of memory\n");
diff --git a/drivers/block/paride/bpck6.c b/drivers/block/paride/bpck6.c
index 08d858ad64db..41a237c5957d 100644
--- a/drivers/block/paride/bpck6.c
+++ b/drivers/block/paride/bpck6.c
@@ -224,10 +224,9 @@ static void bpck6_log_adapter( PIA *pi, char * scratch, int verbose )
 
 static int bpck6_init_proto(PIA *pi)
 {
-        Interface *p = kmalloc(sizeof(Interface), GFP_KERNEL);
+        Interface *p = kzalloc(sizeof(Interface), GFP_KERNEL);
 
         if (p) {
-                memset(p, 0, sizeof(Interface));
                 pi->private = (unsigned long)p;
                 return 0;
         }
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index c7671e188017..b4a41d6d0714 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -2143,6 +2143,7 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
         req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
         req.data = (char *)&capbuf;
         req.data_len = sizeof(capbuf);
+        req.flags |= REQ_QUIET;
 
         stat = cdrom_queue_packet_command(drive, &req);
         if (stat == 0) {
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index bd7db861041e..3c1b0294a742 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -90,12 +90,12 @@ struct hd_struct {
 #define GENHD_FL_SUPPRESS_PARTITION_INFO        32
 
 struct disk_stats {
-        unsigned sectors[2];            /* READs and WRITEs */
-        unsigned ios[2];
-        unsigned merges[2];
-        unsigned ticks[2];
-        unsigned io_ticks;
-        unsigned time_in_queue;
+        unsigned long sectors[2];       /* READs and WRITEs */
+        unsigned long ios[2];
+        unsigned long merges[2];
+        unsigned long ticks[2];
+        unsigned long io_ticks;
+        unsigned long time_in_queue;
 };
         
 struct gendisk {
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7e70ab13e191..6e8a60f67c7a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -172,7 +172,7 @@ config DEBUG_IOREMAP
 
 config DEBUG_FS
         bool "Debug Filesystem"
-        depends on DEBUG_KERNEL && SYSFS
+        depends on SYSFS
         help
           debugfs is a virtual file system that kernel developers use to put
           debugging files into.  Enable this option to be able to read and