32 files changed, 398 insertions, 222 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 87851efb0228..d1cd5f93e028 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -120,6 +120,13 @@ Who:    Adrian Bunk <bunk@stusta.de>
 
 ---------------------------
 
+What:  drivers depending on OSS_OBSOLETE_DRIVER
+When:  options in 2.6.20, code in 2.6.22
+Why:   OSS drivers with ALSA replacements
+Who:   Adrian Bunk <bunk@stusta.de>
+
+---------------------------
+
 What:   pci_module_init(driver)
 When:   January 2007
 Why:    Is replaced by pci_register_driver(pci_driver).
diff --git a/arch/i386/kernel/hpet.c b/arch/i386/kernel/hpet.c
index c6737c35815d..17647a530b2f 100644
--- a/arch/i386/kernel/hpet.c
+++ b/arch/i386/kernel/hpet.c
@@ -35,7 +35,7 @@ static int __init init_hpet_clocksource(void)
         void __iomem* hpet_base;
         u64 tmp;
 
-        if (!hpet_address)
+        if (!is_hpet_enabled())
                 return -ENODEV;
 
         /* calculate the hpet address: */
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 060789e31c67..39f7ddb554ea 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -87,8 +87,8 @@ static void __pmac_retrigger(unsigned int irq_nr)
 static void pmac_mask_and_ack_irq(unsigned int virq)
 {
         unsigned int src = irq_map[virq].hwirq;
-        unsigned long bit = 1UL << (virq & 0x1f);
-        int i = virq >> 5;
+        unsigned long bit = 1UL << (src & 0x1f);
+        int i = src >> 5;
         unsigned long flags;
 
         spin_lock_irqsave(&pmac_pic_lock, flags);
@@ -175,7 +175,7 @@ static void pmac_mask_irq(unsigned int virq)
 
         spin_lock_irqsave(&pmac_pic_lock, flags);
         __clear_bit(src, ppc_cached_irq_mask);
-        __pmac_set_irq_mask(src, 0);
+        __pmac_set_irq_mask(src, 1);
         spin_unlock_irqrestore(&pmac_pic_lock, flags);
 }
 
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index 5064d9383963..9aea23cc0dc5 100644
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -212,7 +212,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
          */
         case PTRACE_KILL:
                 ret = 0;
-                if (child->state == EXIT_ZOMBIE)        /* already dead */
+                if (child->exit_state == EXIT_ZOMBIE)   /* already dead */
                         break;
                 child->exit_code = SIGKILL;
                 child->ptrace &= ~PT_SINGLESTEP;
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 5109fa37c662..ad1d7065a1b2 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4177,6 +4177,11 @@ static int __init floppy_init(void)
         int i, unit, drive;
         int err, dr;
 
+#if defined(CONFIG_PPC_MERGE)
+        if (check_legacy_ioport(FDC1))
+                return -ENODEV;
+#endif
+
         raw_cmd = NULL;
 
         for (dr = 0; dr < N_DRIVE; dr++) {
@@ -4234,13 +4239,6 @@ static int __init floppy_init(void)
         }
 
         use_virtual_dma = can_use_virtual_dma & 1;
-#if defined(CONFIG_PPC_MERGE)
-        if (check_legacy_ioport(FDC1)) {
-                del_timer(&fd_timeout);
-                err = -ENODEV;
-                goto out_unreg_region;
-        }
-#endif
         fdc_state[0].address = FDC1;
         if (fdc_state[0].address == -1) {
                 del_timer(&fd_timeout);
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index 0aa5d608fe6f..843d34c8627c 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -3428,6 +3428,7 @@ struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
 
         rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
         if (rv) {
+                rv->user = NULL;
                 rv->done = free_recv_msg;
                 atomic_inc(&recv_msg_inuse_count);
         }
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index b2dbbdb1bf81..2f07b085536b 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -391,8 +391,8 @@ static MGSL_PARAMS default_params = {
 #define DESC_LIST_SIZE 4096
 
 #define MASK_PARITY  BIT1
-#define MASK_FRAMING BIT2
-#define MASK_BREAK   BIT3
+#define MASK_FRAMING BIT0
+#define MASK_BREAK   BIT14
 #define MASK_OVERRUN BIT4
 
 #define GSR   0x00 /* global status */
@@ -1800,17 +1800,17 @@ static void rx_async(struct slgt_info *info)
 
                         stat = 0;
 
-                        if ((status = *(p+1) & (BIT9 + BIT8))) {
-                                if (status & BIT9)
+                        if ((status = *(p+1) & (BIT1 + BIT0))) {
+                                if (status & BIT1)
                                         icount->parity++;
-                                else if (status & BIT8)
+                                else if (status & BIT0)
                                         icount->frame++;
                                 /* discard char if tty control flags say so */
                                 if (status & info->ignore_status_mask)
                                         continue;
-                                if (status & BIT9)
+                                if (status & BIT1)
                                         stat = TTY_PARITY;
-                                else if (status & BIT8)
+                                else if (status & BIT0)
                                         stat = TTY_FRAME;
                         }
                         if (tty) {
diff --git a/drivers/char/watchdog/sbc8360.c b/drivers/char/watchdog/sbc8360.c
index 1035be5b5019..41fc6f80c493 100644
--- a/drivers/char/watchdog/sbc8360.c
+++ b/drivers/char/watchdog/sbc8360.c
@@ -200,7 +200,7 @@ static int wd_margin = 0xB;
 static int wd_multiplier = 2;
 static int nowayout = WATCHDOG_NOWAYOUT;
 
-module_param(timeout, int, 27);
+module_param(timeout, int, 0);
 MODULE_PARM_DESC(timeout, "Index into timeout table (0-63) (default=27 (60s))");
 module_param(nowayout, int, 0);
 MODULE_PARM_DESC(nowayout,
@@ -407,7 +407,7 @@ module_exit(sbc8360_exit);
 MODULE_AUTHOR("Ian E. Morgan <imorgan@webcon.ca>");
 MODULE_DESCRIPTION("SBC8360 watchdog driver");
 MODULE_LICENSE("GPL");
-MODULE_VERSION("1.0");
+MODULE_VERSION("1.01");
 MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
 
 /* end of sbc8360.c */
diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c
index e125032bb403..d8a0d87df734 100644
--- a/drivers/ide/pci/sgiioc4.c
+++ b/drivers/ide/pci/sgiioc4.c
@@ -367,12 +367,13 @@ sgiioc4_INB(unsigned long port)
 static void __devinit
 ide_dma_sgiioc4(ide_hwif_t * hwif, unsigned long dma_base)
 {
+        void __iomem *virt_dma_base;
         int num_ports = sizeof (ioc4_dma_regs_t);
 
         printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name,
                dma_base, dma_base + num_ports - 1);
 
-        if (!request_region(dma_base, num_ports, hwif->name)) {
+        if (!request_mem_region(dma_base, num_ports, hwif->name)) {
                 printk(KERN_ERR
                        "%s(%s) -- ERROR, Addresses 0x%p to 0x%p "
                        "ALREADY in use\n",
@@ -381,13 +382,21 @@ ide_dma_sgiioc4(ide_hwif_t * hwif, unsigned long dma_base)
                 goto dma_alloc_failure;
         }
 
-        hwif->dma_base = dma_base;
+        virt_dma_base = ioremap(dma_base, num_ports);
+        if (virt_dma_base == NULL) {
+                printk(KERN_ERR
+                       "%s(%s) -- ERROR, Unable to map addresses 0x%lx to 0x%lx\n",
+                       __FUNCTION__, hwif->name, dma_base, dma_base + num_ports - 1);
+                goto dma_remap_failure;
+        }
+        hwif->dma_base = (unsigned long) virt_dma_base;
+
         hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
                                           IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
                                           &hwif->dmatable_dma);
 
         if (!hwif->dmatable_cpu)
-                goto dma_alloc_failure;
+                goto dma_pci_alloc_failure;
 
         hwif->sg_max_nents = IOC4_PRD_ENTRIES;
 
@@ -411,6 +420,12 @@ dma_base2alloc_failure:
         printk(KERN_INFO
                "Changing from DMA to PIO mode for Drive %s\n", hwif->name);
 
+dma_pci_alloc_failure:
+        iounmap(virt_dma_base);
+
+dma_remap_failure:
+        release_mem_region(dma_base, num_ports);
+
 dma_alloc_failure:
         /* Disable DMA because we couldnot allocate any DMA maps */
         hwif->autodma = 0;
@@ -607,18 +622,15 @@ ide_init_sgiioc4(ide_hwif_t * hwif)
         hwif->ide_dma_lostirq = &sgiioc4_ide_dma_lostirq;
         hwif->ide_dma_timeout = &__ide_dma_timeout;
 
-        /*
-         * The IOC4 uses MMIO rather than Port IO.
-         * It also needs special workarounds for INB.
-         */
-        default_hwif_mmiops(hwif);
         hwif->INB = &sgiioc4_INB;
 }
 
 static int __devinit
 sgiioc4_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t * d)
 {
-        unsigned long base, ctl, dma_base, irqport;
+        unsigned long cmd_base, dma_base, irqport;
+        unsigned long bar0, cmd_phys_base, ctl;
+        void __iomem *virt_base;
         ide_hwif_t *hwif;
         int h;
 
@@ -636,23 +648,32 @@ sgiioc4_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t * d)
         }
 
         /*  Get the CmdBlk and CtrlBlk Base Registers */
-        base = pci_resource_start(dev, 0) + IOC4_CMD_OFFSET;
-        ctl = pci_resource_start(dev, 0) + IOC4_CTRL_OFFSET;
-        irqport = pci_resource_start(dev, 0) + IOC4_INTR_OFFSET;
+        bar0 = pci_resource_start(dev, 0);
+        virt_base = ioremap(bar0, pci_resource_len(dev, 0));
+        if (virt_base == NULL) {
+                printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n",
+                        d->name, bar0);
+                return -ENOMEM;
+        }
+        cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET;
+        ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET;
+        irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET;
         dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
 
-        if (!request_region(base, IOC4_CMD_CTL_BLK_SIZE, hwif->name)) {
+        cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
+        if (!request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
+            hwif->name)) {
                 printk(KERN_ERR
-                        "%s : %s -- ERROR, Port Addresses "
+                        "%s : %s -- ERROR, Addresses "
                         "0x%p to 0x%p ALREADY in use\n",
-                       __FUNCTION__, hwif->name, (void *) base,
-                       (void *) base + IOC4_CMD_CTL_BLK_SIZE);
+                       __FUNCTION__, hwif->name, (void *) cmd_phys_base,
+                       (void *) cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
                 return -ENOMEM;
         }
 
-        if (hwif->io_ports[IDE_DATA_OFFSET] != base) {
+        if (hwif->io_ports[IDE_DATA_OFFSET] != cmd_base) {
                 /* Initialize the IO registers */
-                sgiioc4_init_hwif_ports(&hwif->hw, base, ctl, irqport);
+                sgiioc4_init_hwif_ports(&hwif->hw, cmd_base, ctl, irqport);
                 memcpy(hwif->io_ports, hwif->hw.io_ports,
                        sizeof (hwif->io_ports));
                 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
@@ -665,6 +686,9 @@ sgiioc4_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t * d)
         hwif->cds = (struct ide_pci_device_s *) d;
         hwif->gendev.parent = &dev->dev;/* setup proper ancestral information */
 
+        /* The IOC4 uses MMIO rather than Port IO. */
+        default_hwif_mmiops(hwif);
+
         /* Initializing chipset IRQ Registers */
         hwif->OUTL(0x03, irqport + IOC4_INTR_SET * 4);
 
diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c
index 25157f57a6d0..f930e55b58fc 100644
--- a/drivers/infiniband/hw/mthca/mthca_allocator.c
+++ b/drivers/infiniband/hw/mthca/mthca_allocator.c
@@ -41,9 +41,11 @@
 /* Trivial bitmap-based allocator */
 u32 mthca_alloc(struct mthca_alloc *alloc)
 {
+        unsigned long flags;
         u32 obj;
 
-        spin_lock(&alloc->lock);
+        spin_lock_irqsave(&alloc->lock, flags);
+
         obj = find_next_zero_bit(alloc->table, alloc->max, alloc->last);
         if (obj >= alloc->max) {
                 alloc->top = (alloc->top + alloc->max) & alloc->mask;
@@ -56,19 +58,24 @@ u32 mthca_alloc(struct mthca_alloc *alloc)
         } else
                 obj = -1;
 
-        spin_unlock(&alloc->lock);
+        spin_unlock_irqrestore(&alloc->lock, flags);
 
         return obj;
 }
 
 void mthca_free(struct mthca_alloc *alloc, u32 obj)
 {
+        unsigned long flags;
+
         obj &= alloc->max - 1;
-        spin_lock(&alloc->lock);
+
+        spin_lock_irqsave(&alloc->lock, flags);
+
         clear_bit(obj, alloc->table);
         alloc->last = min(alloc->last, obj);
         alloc->top = (alloc->top + alloc->max) & alloc->mask;
-        spin_unlock(&alloc->lock);
+
+        spin_unlock_irqrestore(&alloc->lock, flags);
 }
 
 int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask,
diff --git a/drivers/macintosh/via-pmu-backlight.c b/drivers/macintosh/via-pmu-backlight.c
index d3f8d75bcbb4..a82f313d9dc9 100644
--- a/drivers/macintosh/via-pmu-backlight.c
+++ b/drivers/macintosh/via-pmu-backlight.c
@@ -18,17 +18,48 @@
 static struct backlight_properties pmu_backlight_data;
 static spinlock_t pmu_backlight_lock;
 static int sleeping;
+static u8 bl_curve[FB_BACKLIGHT_LEVELS];
 
-static int pmu_backlight_get_level_brightness(struct fb_info *info,
-                int level)
+static void pmu_backlight_init_curve(u8 off, u8 min, u8 max)
+{
+        unsigned int i, flat, count, range = (max - min);
+
+        bl_curve[0] = off;
+
+        for (flat = 1; flat < (FB_BACKLIGHT_LEVELS / 16); ++flat)
+                bl_curve[flat] = min;
+
+        count = FB_BACKLIGHT_LEVELS * 15 / 16;
+        for (i = 0; i < count; ++i)
+                bl_curve[flat + i] = min + (range * (i + 1) / count);
+}
+
+static int pmu_backlight_curve_lookup(int value)
+{
+        int level = (FB_BACKLIGHT_LEVELS - 1);
+        int i, max = 0;
+
+        /* Look for biggest value */
+        for (i = 0; i < FB_BACKLIGHT_LEVELS; i++)
+                max = max((int)bl_curve[i], max);
+
+        /* Look for nearest value */
+        for (i = 0; i < FB_BACKLIGHT_LEVELS; i++) {
+                int diff = abs(bl_curve[i] - value);
+                if (diff < max) {
+                        max = diff;
+                        level = i;
+                }
+        }
+        return level;
+}
+
+static int pmu_backlight_get_level_brightness(int level)
 {
         int pmulevel;
 
         /* Get and convert the value */
-        mutex_lock(&info->bl_mutex);
-        pmulevel = info->bl_curve[level] * FB_BACKLIGHT_MAX / MAX_PMU_LEVEL;
-        mutex_unlock(&info->bl_mutex);
-
+        pmulevel = bl_curve[level] * FB_BACKLIGHT_MAX / MAX_PMU_LEVEL;
         if (pmulevel < 0)
                 pmulevel = 0;
         else if (pmulevel > MAX_PMU_LEVEL)
@@ -39,7 +70,6 @@ static int pmu_backlight_get_level_brightness(struct fb_info *info,
 
 static int pmu_backlight_update_status(struct backlight_device *bd)
 {
-        struct fb_info *info = class_get_devdata(&bd->class_dev);
         struct adb_request req;
         unsigned long flags;
         int level = bd->props->brightness;
@@ -55,7 +85,7 @@ static int pmu_backlight_update_status(struct backlight_device *bd)
                 level = 0;
 
         if (level > 0) {
-                int pmulevel = pmu_backlight_get_level_brightness(info, level);
+                int pmulevel = pmu_backlight_get_level_brightness(level);
 
                 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT, pmulevel);
                 pmu_wait_complete(&req);
@@ -88,35 +118,19 @@ static struct backlight_properties pmu_backlight_data = {
 };
 
 #ifdef CONFIG_PM
-static int pmu_backlight_sleep_call(struct pmu_sleep_notifier *self, int when)
+void pmu_backlight_set_sleep(int sleep)
 {
         unsigned long flags;
 
         spin_lock_irqsave(&pmu_backlight_lock, flags);
-
-        switch (when) {
-        case PBOOK_SLEEP_REQUEST:
-                sleeping = 1;
-                break;
-        case PBOOK_WAKE:
-                sleeping = 0;
-                break;
-        }
-
+        sleeping = sleep;
         spin_unlock_irqrestore(&pmu_backlight_lock, flags);
-
-        return PBOOK_SLEEP_OK;
 }
-
-static struct pmu_sleep_notifier pmu_backlight_sleep_notif = {
-        .notifier_call = pmu_backlight_sleep_call,
-};
-#endif
+#endif /* CONFIG_PM */
 
 void __init pmu_backlight_init()
 {
         struct backlight_device *bd;
-        struct fb_info *info;
         char name[10];
         int level, autosave;
 
@@ -131,27 +145,14 @@ void __init pmu_backlight_init()
             !machine_is_compatible("PowerBook1,1"))
                 return;
 
-        /* Actually, this is a hack, but I don't know of a better way
-         * to get the first framebuffer device.
-         */
-        info = registered_fb[0];
-        if (!info) {
-                printk("pmubl: No framebuffer found\n");
-                goto error;
-        }
-
-        snprintf(name, sizeof(name), "pmubl%d", info->node);
+        snprintf(name, sizeof(name), "pmubl");
 
-        bd = backlight_device_register(name, info, &pmu_backlight_data);
+        bd = backlight_device_register(name, NULL, &pmu_backlight_data);
         if (IS_ERR(bd)) {
                 printk("pmubl: Backlight registration failed\n");
                 goto error;
         }
-
-        mutex_lock(&info->bl_mutex);
-        info->bl_dev = bd;
-        fb_bl_default_curve(info, 0x7F, 0x46, 0x0E);
-        mutex_unlock(&info->bl_mutex);
+        pmu_backlight_init_curve(0x7F, 0x46, 0x0E);
 
         level = pmu_backlight_data.max_brightness;
 
@@ -161,28 +162,22 @@ void __init pmu_backlight_init()
                 pmu_request(&req, NULL, 2, 0xd9, 0);
                 pmu_wait_complete(&req);
 
-                mutex_lock(&info->bl_mutex);
-                level = pmac_backlight_curve_lookup(info,
+                level = pmu_backlight_curve_lookup(
                                 (req.reply[0] >> 4) *
                                 pmu_backlight_data.max_brightness / 15);
-                mutex_unlock(&info->bl_mutex);
         }
 
-        up(&bd->sem);
+        down(&bd->sem);
         bd->props->brightness = level;
         bd->props->power = FB_BLANK_UNBLANK;
         bd->props->update_status(bd);
-        down(&bd->sem);
+        up(&bd->sem);
 
         mutex_lock(&pmac_backlight_mutex);
         if (!pmac_backlight)
                 pmac_backlight = bd;
         mutex_unlock(&pmac_backlight_mutex);
 
-#ifdef CONFIG_PM
-        pmu_register_sleep_notifier(&pmu_backlight_sleep_notif);
-#endif
-
         printk("pmubl: Backlight initialized (%s)\n", name);
 
         return;
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index ea386801e215..14610a63f580 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -1995,6 +1995,8 @@ restore_via_state(void)
         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 }
 
+extern void pmu_backlight_set_sleep(int sleep);
+
 static int
 pmac_suspend_devices(void)
 {
@@ -2032,6 +2034,11 @@ pmac_suspend_devices(void)
                 return -EBUSY;
         }
 
+#ifdef CONFIG_PMAC_BACKLIGHT
+        /* Tell backlight code not to muck around with the chip anymore */
+        pmu_backlight_set_sleep(1);
+#endif
+
         /* Call platform functions marked "on sleep" */
         pmac_pfunc_i2c_suspend();
         pmac_pfunc_base_suspend();
@@ -2090,6 +2097,11 @@ pmac_wakeup_devices(void)
 {
         mdelay(100);
 
+#ifdef CONFIG_PMAC_BACKLIGHT
+        /* Tell backlight code it can use the chip again */
+        pmu_backlight_set_sleep(0);
+#endif
+
         /* Power back up system devices (including the PIC) */
         device_power_up();
 
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 87bfe9e7d8ca..3b4d69c05623 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -930,10 +930,13 @@ static void status(struct seq_file *seq, mddev_t *mddev)
 
         seq_printf(seq, " [%d/%d] [", conf->raid_disks,
                                                 conf->working_disks);
-        for (i = 0; i < conf->raid_disks; i++)
+        rcu_read_lock();
+        for (i = 0; i < conf->raid_disks; i++) {
+                mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
                 seq_printf(seq, "%s",
-                              conf->mirrors[i].rdev &&
-                              test_bit(In_sync, &conf->mirrors[i].rdev->flags) ? "U" : "_");
+                           rdev && test_bit(In_sync, &rdev->flags) ? "U" : "_");
+        }
+        rcu_read_unlock();
         seq_printf(seq, "]");
 }
 
@@ -975,7 +978,6 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
 static void print_conf(conf_t *conf)
 {
         int i;
-        mirror_info_t *tmp;
 
         printk("RAID1 conf printout:\n");
         if (!conf) {
@@ -985,14 +987,17 @@ static void print_conf(conf_t *conf)
         printk(" --- wd:%d rd:%d\n", conf->working_disks,
                 conf->raid_disks);
 
+        rcu_read_lock();
         for (i = 0; i < conf->raid_disks; i++) {
                 char b[BDEVNAME_SIZE];
-                tmp = conf->mirrors + i;
-                if (tmp->rdev)
+                mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
+                if (rdev)
                         printk(" disk %d, wo:%d, o:%d, dev:%s\n",
-                                i, !test_bit(In_sync, &tmp->rdev->flags), !test_bit(Faulty, &tmp->rdev->flags),
-                                bdevname(tmp->rdev->bdev,b));
+                               i, !test_bit(In_sync, &rdev->flags),
+                               !test_bit(Faulty, &rdev->flags),
+                               bdevname(rdev->bdev,b));
         }
+        rcu_read_unlock();
 }
 
 static void close_sync(conf_t *conf)
@@ -1008,20 +1013,20 @@ static int raid1_spare_active(mddev_t *mddev)
 {
         int i;
         conf_t *conf = mddev->private;
-        mirror_info_t *tmp;
 
         /*
          * Find all failed disks within the RAID1 configuration 
-         * and mark them readable
+         * and mark them readable.
+         * Called under mddev lock, so rcu protection not needed.
          */
         for (i = 0; i < conf->raid_disks; i++) {
-                tmp = conf->mirrors + i;
-                if (tmp->rdev 
-                    && !test_bit(Faulty, &tmp->rdev->flags)
-                    && !test_bit(In_sync, &tmp->rdev->flags)) {
+                mdk_rdev_t *rdev = conf->mirrors[i].rdev;
+                if (rdev
+                    && !test_bit(Faulty, &rdev->flags)
+                    && !test_bit(In_sync, &rdev->flags)) {
                         conf->working_disks++;
                         mddev->degraded--;
-                        set_bit(In_sync, &tmp->rdev->flags);
+                        set_bit(In_sync, &rdev->flags);
                 }
         }
 
@@ -1237,7 +1242,7 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio)
                 /* ouch - failed to read all of that.
                  * Try some synchronous reads of other devices to get
                  * good data, much like with normal read errors.  Only
-                 * read into the pages we already have so they we don't
+                 * read into the pages we already have so we don't
                  * need to re-issue the read request.
                  * We don't need to freeze the array, because being in an
                  * active sync request, there is no normal IO, and
@@ -1257,6 +1262,10 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio)
                                 s = PAGE_SIZE >> 9;
                         do {
                                 if (r1_bio->bios[d]->bi_end_io == end_sync_read) {
+                                        /* No rcu protection needed here devices
+                                         * can only be removed when no resync is
+                                         * active, and resync is currently active
+                                         */
                                         rdev = conf->mirrors[d].rdev;
                                         if (sync_page_io(rdev->bdev,
                                                          sect + rdev->data_offset,
@@ -1463,6 +1472,11 @@ static void raid1d(mddev_t *mddev)
                                         s = PAGE_SIZE >> 9;
 
                                 do {
+                                        /* Note: no rcu protection needed here
+                                         * as this is synchronous in the raid1d thread
+                                         * which is the thread that might remove
+                                         * a device.  If raid1d ever becomes multi-threaded....
+                                         */
                                         rdev = conf->mirrors[d].rdev;
                                         if (rdev &&
                                             test_bit(In_sync, &rdev->flags) &&
@@ -1486,7 +1500,6 @@ static void raid1d(mddev_t *mddev)
                                                         d = conf->raid_disks;
                                                 d--;
                                                 rdev = conf->mirrors[d].rdev;
-                                                atomic_add(s, &rdev->corrected_errors);
                                                 if (rdev &&
                                                     test_bit(In_sync, &rdev->flags)) {
                                                         if (sync_page_io(rdev->bdev,
@@ -1509,9 +1522,11 @@ static void raid1d(mddev_t *mddev)
                                                                          s<<9, conf->tmppage, READ) == 0)
                                                                 /* Well, this device is dead */
                                                                 md_error(mddev, rdev);
-                                                        else
+                                                        else {
+                                                                atomic_add(s, &rdev->corrected_errors);
                                                                 printk(KERN_INFO "raid1:%s: read error corrected (%d sectors at %llu on %s)\n",
                                                                        mdname(mddev), s, (unsigned long long)(sect + rdev->data_offset), bdevname(rdev->bdev, b));
+                                                        }
                                                 }
                                         }
                                 } else {
@@ -1787,19 +1802,17 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
                 for (i=0; i<conf->raid_disks; i++) {
                         bio = r1_bio->bios[i];
                         if (bio->bi_end_io == end_sync_read) {
-                                md_sync_acct(conf->mirrors[i].rdev->bdev, nr_sectors);
+                                md_sync_acct(bio->bi_bdev, nr_sectors);
                                 generic_make_request(bio);
                         }
                 }
         } else {
                 atomic_set(&r1_bio->remaining, 1);
                 bio = r1_bio->bios[r1_bio->read_disk];
-                md_sync_acct(conf->mirrors[r1_bio->read_disk].rdev->bdev,
-                             nr_sectors);
+                md_sync_acct(bio->bi_bdev, nr_sectors);
                 generic_make_request(bio);
 
         }
-
         return nr_sectors;
 }
 
diff --git a/drivers/video/aty/aty128fb.c b/drivers/video/aty/aty128fb.c
index 106d428b72c9..276a21530b95 100644
--- a/drivers/video/aty/aty128fb.c
+++ b/drivers/video/aty/aty128fb.c
@@ -1800,14 +1800,15 @@ static struct backlight_properties aty128_bl_data = {
 
 static void aty128_bl_set_power(struct fb_info *info, int power)
 {
-        if (info->bl_dev == NULL)
-                return;
-
         mutex_lock(&info->bl_mutex);
-        up(&info->bl_dev->sem);
-        info->bl_dev->props->power = power;
-        __aty128_bl_update_status(info->bl_dev);
-        down(&info->bl_dev->sem);
+
+        if (info->bl_dev) {
+                down(&info->bl_dev->sem);
+                info->bl_dev->props->power = power;
+                __aty128_bl_update_status(info->bl_dev);
+                up(&info->bl_dev->sem);
+        }
+
         mutex_unlock(&info->bl_mutex);
 }
 
@@ -1842,11 +1843,11 @@ static void aty128_bl_init(struct aty128fb_par *par)
                 219 * FB_BACKLIGHT_MAX / MAX_LEVEL);
         mutex_unlock(&info->bl_mutex);
 
-        up(&bd->sem);
+        down(&bd->sem);
         bd->props->brightness = aty128_bl_data.max_brightness;
         bd->props->power = FB_BLANK_UNBLANK;
         bd->props->update_status(bd);
-        down(&bd->sem);
+        up(&bd->sem);
 
 #ifdef CONFIG_PMAC_BACKLIGHT
         mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c
index 510e4ea296ed..19a71f045784 100644
--- a/drivers/video/aty/atyfb_base.c
+++ b/drivers/video/aty/atyfb_base.c
@@ -2199,14 +2199,15 @@ static struct backlight_properties aty_bl_data = {
 
 static void aty_bl_set_power(struct fb_info *info, int power)
 {
-        if (info->bl_dev == NULL)
-                return;
-
         mutex_lock(&info->bl_mutex);
-        up(&info->bl_dev->sem);
-        info->bl_dev->props->power = power;
-        __aty_bl_update_status(info->bl_dev);
-        down(&info->bl_dev->sem);
+
+        if (info->bl_dev) {
+                down(&info->bl_dev->sem);
+                info->bl_dev->props->power = power;
+                __aty_bl_update_status(info->bl_dev);
+                up(&info->bl_dev->sem);
+        }
+
         mutex_unlock(&info->bl_mutex);
 }
 
@@ -2237,11 +2238,11 @@ static void aty_bl_init(struct atyfb_par *par)
                 0xFF * FB_BACKLIGHT_MAX / MAX_LEVEL);
         mutex_unlock(&info->bl_mutex);
 
-        up(&bd->sem);
+        down(&bd->sem);
         bd->props->brightness = aty_bl_data.max_brightness;
         bd->props->power = FB_BLANK_UNBLANK;
         bd->props->update_status(bd);
-        down(&bd->sem);
+        up(&bd->sem);
 
 #ifdef CONFIG_PMAC_BACKLIGHT
         mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/aty/radeon_backlight.c b/drivers/video/aty/radeon_backlight.c
index 1755dddf1899..585eb7b9e636 100644
--- a/drivers/video/aty/radeon_backlight.c
+++ b/drivers/video/aty/radeon_backlight.c
@@ -195,11 +195,11 @@ void radeonfb_bl_init(struct radeonfb_info *rinfo)
                 217 * FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL);
         mutex_unlock(&rinfo->info->bl_mutex);
 
-        up(&bd->sem);
+        down(&bd->sem);
         bd->props->brightness = radeon_bl_data.max_brightness;
         bd->props->power = FB_BLANK_UNBLANK;
         bd->props->update_status(bd);
-        down(&bd->sem);
+        up(&bd->sem);
 
 #ifdef CONFIG_PMAC_BACKLIGHT
         mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/nvidia/nv_backlight.c b/drivers/video/nvidia/nv_backlight.c
index 14c37c42191c..5b75ae4e9457 100644
--- a/drivers/video/nvidia/nv_backlight.c
+++ b/drivers/video/nvidia/nv_backlight.c
@@ -112,13 +112,15 @@ static struct backlight_properties nvidia_bl_data = {
 
 void nvidia_bl_set_power(struct fb_info *info, int power)
 {
-        if (info->bl_dev == NULL)
-                return;
         mutex_lock(&info->bl_mutex);
-        up(&info->bl_dev->sem);
-        info->bl_dev->props->power = power;
-        __nvidia_bl_update_status(info->bl_dev);
-        down(&info->bl_dev->sem);
+
+        if (info->bl_dev) {
+                down(&info->bl_dev->sem);
+                info->bl_dev->props->power = power;
+                __nvidia_bl_update_status(info->bl_dev);
+                up(&info->bl_dev->sem);
+        }
+
         mutex_unlock(&info->bl_mutex);
 }
 
@@ -153,11 +155,11 @@ void nvidia_bl_init(struct nvidia_par *par)
                 0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
         mutex_unlock(&info->bl_mutex);
 
-        up(&bd->sem);
+        down(&bd->sem);
         bd->props->brightness = nvidia_bl_data.max_brightness;
         bd->props->power = FB_BLANK_UNBLANK;
         bd->props->update_status(bd);
-        down(&bd->sem);
+        up(&bd->sem);
 
 #ifdef CONFIG_PMAC_BACKLIGHT
         mutex_lock(&pmac_backlight_mutex);
diff --git a/drivers/video/riva/fbdev.c b/drivers/video/riva/fbdev.c
index 90363943bd57..8ddb47a56b07 100644
--- a/drivers/video/riva/fbdev.c
+++ b/drivers/video/riva/fbdev.c
@@ -354,14 +354,15 @@ static struct backlight_properties riva_bl_data = {
 
 static void riva_bl_set_power(struct fb_info *info, int power)
 {
-        if (info->bl_dev == NULL)
-                return;
-
         mutex_lock(&info->bl_mutex);
-        up(&info->bl_dev->sem);
-        info->bl_dev->props->power = power;
-        __riva_bl_update_status(info->bl_dev);
-        down(&info->bl_dev->sem);
+
+        if (info->bl_dev) {
+                down(&info->bl_dev->sem);
+                info->bl_dev->props->power = power;
+                __riva_bl_update_status(info->bl_dev);
+                up(&info->bl_dev->sem);
+        }
+
         mutex_unlock(&info->bl_mutex);
 }
 
@@ -396,11 +397,11 @@ static void riva_bl_init(struct riva_par *par)
                 0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
         mutex_unlock(&info->bl_mutex);
 
-        up(&bd->sem);
+        down(&bd->sem);
         bd->props->brightness = riva_bl_data.max_brightness;
         bd->props->power = FB_BLANK_UNBLANK;
         bd->props->update_status(bd);
-        down(&bd->sem);
+        up(&bd->sem);
 
 #ifdef CONFIG_PMAC_BACKLIGHT
         mutex_lock(&pmac_backlight_mutex);
diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index de2e4cbbf79a..f5169a96260e 100644
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -727,7 +727,7 @@ done:
 
 out:
         if (unlikely(frozen_buffer))    /* It's usually NULL */
-                kfree(frozen_buffer);
+                jbd_slab_free(frozen_buffer, bh->b_size);
 
         JBUFFER_TRACE(jh, "exit");
         return error;
diff --git a/include/asm-i386/mach-default/mach_mpspec.h b/include/asm-i386/mach-default/mach_mpspec.h
index 6b5dadcf1d0e..51c9a9775932 100644
--- a/include/asm-i386/mach-default/mach_mpspec.h
+++ b/include/asm-i386/mach-default/mach_mpspec.h
@@ -3,6 +3,10 @@
 
 #define MAX_IRQ_SOURCES 256
 
+#if CONFIG_BASE_SMALL == 0
+#define MAX_MP_BUSSES 256
+#else
 #define MAX_MP_BUSSES 32
+#endif
 
 #endif /* __ASM_MACH_MPSPEC_H */
diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h
index 11487b6e7127..561e2a77805c 100644
--- a/include/linux/delayacct.h
+++ b/include/linux/delayacct.h
@@ -59,10 +59,14 @@ static inline void delayacct_tsk_init(struct task_struct *tsk)
                 __delayacct_tsk_init(tsk);
 }
 
-static inline void delayacct_tsk_exit(struct task_struct *tsk)
+/* Free tsk->delays. Called from bad fork and __put_task_struct
+ * where there's no risk of tsk->delays being accessed elsewhere
+ */
+static inline void delayacct_tsk_free(struct task_struct *tsk)
 {
         if (tsk->delays)
-                __delayacct_tsk_exit(tsk);
+                kmem_cache_free(delayacct_cache, tsk->delays);
+        tsk->delays = NULL;
 }
 
 static inline void delayacct_blkio_start(void)
@@ -101,7 +105,7 @@ static inline void delayacct_init(void)
 {}
 static inline void delayacct_tsk_init(struct task_struct *tsk)
 {}
-static inline void delayacct_tsk_exit(struct task_struct *tsk)
+static inline void delayacct_tsk_free(struct task_struct *tsk)
 {}
 static inline void delayacct_blkio_start(void)
 {}
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 656b588a9f96..f45163c528e8 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -77,6 +77,7 @@ struct per_cpu_pages {
 struct per_cpu_pageset {
         struct per_cpu_pages pcp[2];    /* 0: hot.  1: cold */
 #ifdef CONFIG_SMP
+        s8 stat_threshold;
         s8 vm_stat_diff[NR_VM_ZONE_STAT_ITEMS];
 #endif
 } ____cacheline_aligned_in_smp;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6674fc1e51bf..34ed0d99b1bd 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -994,7 +994,6 @@ struct task_struct {
          */
         struct pipe_inode_info *splice_pipe;
 #ifdef  CONFIG_TASK_DELAY_ACCT
-        spinlock_t delays_lock;
         struct task_delay_info *delays;
 #endif
 };
diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index 57ca3730205d..36752f124c6a 100644
--- a/kernel/delayacct.c
+++ b/kernel/delayacct.c
@@ -41,24 +41,11 @@ void delayacct_init(void)
 
 void __delayacct_tsk_init(struct task_struct *tsk)
 {
-        spin_lock_init(&tsk->delays_lock);
-        /* No need to acquire tsk->delays_lock for allocation here unless
-           __delayacct_tsk_init called after tsk is attached to tasklist
-        */
         tsk->delays = kmem_cache_zalloc(delayacct_cache, SLAB_KERNEL);
         if (tsk->delays)
                 spin_lock_init(&tsk->delays->lock);
 }
 
-void __delayacct_tsk_exit(struct task_struct *tsk)
-{
-        struct task_delay_info *delays = tsk->delays;
-        spin_lock(&tsk->delays_lock);
-        tsk->delays = NULL;
-        spin_unlock(&tsk->delays_lock);
-        kmem_cache_free(delayacct_cache, delays);
-}
-
 /*
  * Start accounting for a delay statistic using
  * its starting timestamp (@start)
@@ -118,8 +105,6 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk)
         struct timespec ts;
         unsigned long t1,t2,t3;
 
-        spin_lock(&tsk->delays_lock);
-
         /* Though tsk->delays accessed later, early exit avoids
          * unnecessary returning of other data
          */
@@ -161,7 +146,6 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk)
         spin_unlock(&tsk->delays->lock);
 
 done:
-        spin_unlock(&tsk->delays_lock);
         return 0;
 }
 
diff --git a/kernel/exit.c b/kernel/exit.c
index dba194a8d416..a4c19a52ce46 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -908,7 +908,6 @@ fastcall NORET_TYPE void do_exit(long code)
                 audit_free(tsk);
         taskstats_exit_send(tsk, tidstats, group_dead, mycpu);
         taskstats_exit_free(tidstats);
-        delayacct_tsk_exit(tsk);
 
         exit_mm(tsk);
 
diff --git a/kernel/fork.c b/kernel/fork.c
index aa36c43783cc..f9b014e3e700 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -117,6 +117,7 @@ void __put_task_struct(struct task_struct *tsk)
         security_task_free(tsk);
         free_uid(tsk->user);
         put_group_info(tsk->group_info);
+        delayacct_tsk_free(tsk);
 
         if (!profile_handoff_task(tsk))
                 free_task(tsk);
@@ -1011,7 +1012,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         retval = -EFAULT;
         if (clone_flags & CLONE_PARENT_SETTID)
                 if (put_user(p->pid, parent_tidptr))
-                        goto bad_fork_cleanup;
+                        goto bad_fork_cleanup_delays_binfmt;
 
         INIT_LIST_HEAD(&p->children);
         INIT_LIST_HEAD(&p->sibling);
@@ -1277,7 +1278,8 @@ bad_fork_cleanup_policy:
 bad_fork_cleanup_cpuset:
 #endif
         cpuset_exit(p);
-bad_fork_cleanup:
+bad_fork_cleanup_delays_binfmt:
+        delayacct_tsk_free(p);
         if (p->binfmt)
                 module_put(p->binfmt->module);
 bad_fork_cleanup_put_domain:
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index fc4e906aedbd..48a53f68af96 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -20,6 +20,11 @@
 
 /**
  * handle_bad_irq - handle spurious and unhandled irqs
+ * @irq:       the interrupt number
+ * @desc:      description of the interrupt
+ * @regs:      pointer to a register structure
+ *
+ * Handles spurious and unhandled IRQ's. It also prints a debugmessage.
  */
 void fastcall
 handle_bad_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index e07e27e846a2..a9963ceddd65 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1176,7 +1176,15 @@ static inline unsigned interleave_nid(struct mempolicy *pol,
         if (vma) {
                 unsigned long off;
 
-                off = vma->vm_pgoff;
+                /*
+                 * for small pages, there is no difference between
+                 * shift and PAGE_SHIFT, so the bit-shift is safe.
+                 * for huge pages, since vm_pgoff is in units of small
+                 * pages, we need to shift off the always 0 bits to get
+                 * a useful offset.
+                 */
+                BUG_ON(shift < PAGE_SHIFT);
+                off = vma->vm_pgoff >> (shift - PAGE_SHIFT);
                 off += (addr - vma->vm_start) >> shift;
                 return offset_il_node(pol, vma, off);
         } else
diff --git a/mm/mempool.c b/mm/mempool.c
index fe6e05289cc5..ccd8cb8cd41f 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -238,8 +238,13 @@ repeat_alloc:
         init_wait(&wait);
         prepare_to_wait(&pool->wait, &wait, TASK_UNINTERRUPTIBLE);
         smp_mb();
-        if (!pool->curr_nr)
-                io_schedule();
+        if (!pool->curr_nr) {
+                /*
+                 * FIXME: this should be io_schedule().  The timeout is there
+                 * as a workaround for some DM problems in 2.6.18.
+                 */
+                io_schedule_timeout(5*HZ);
+        }
         finish_wait(&pool->wait, &wait);
 
         goto repeat_alloc;
diff --git a/mm/vmstat.c b/mm/vmstat.c
index dfdf24133901..c1b5f4106b38 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -12,6 +12,7 @@
 #include <linux/config.h>
 #include <linux/mm.h>
 #include <linux/module.h>
+#include <linux/cpu.h>
 
 void __get_zone_counts(unsigned long *active, unsigned long *inactive,
                         unsigned long *free, struct pglist_data *pgdat)
@@ -114,17 +115,72 @@ EXPORT_SYMBOL(vm_stat);
 
 #ifdef CONFIG_SMP
 
-#define STAT_THRESHOLD 32
+static int calculate_threshold(struct zone *zone)
+{
+        int threshold;
+        int mem;        /* memory in 128 MB units */
+
+        /*
+         * The threshold scales with the number of processors and the amount
+         * of memory per zone. More memory means that we can defer updates for
+         * longer, more processors could lead to more contention.
+         * fls() is used to have a cheap way of logarithmic scaling.
+         *
+         * Some sample thresholds:
+         *
+         * Threshold    Processors      (fls)   Zonesize        fls(mem+1)
+         * ------------------------------------------------------------------
+         * 8            1               1       0.9-1 GB        4
+         * 16           2               2       0.9-1 GB        4
+         * 20           2               2       1-2 GB          5
+         * 24           2               2       2-4 GB          6
+         * 28           2               2       4-8 GB          7
+         * 32           2               2       8-16 GB         8
+         * 4            2               2       <128M           1
+         * 30           4               3       2-4 GB          5
+         * 48           4               3       8-16 GB         8
+         * 32           8               4       1-2 GB          4
+         * 32           8               4       0.9-1GB         4
+         * 10           16              5       <128M           1
+         * 40           16              5       900M            4
+         * 70           64              7       2-4 GB          5
+         * 84           64              7       4-8 GB          6
+         * 108          512             9       4-8 GB          6
+         * 125          1024            10      8-16 GB         8
+         * 125          1024            10      16-32 GB        9
+         */
+
+        mem = zone->present_pages >> (27 - PAGE_SHIFT);
+
+        threshold = 2 * fls(num_online_cpus()) * (1 + fls(mem));
+
+        /*
+         * Maximum threshold is 125
+         */
+        threshold = min(125, threshold);
+
+        return threshold;
+}
 
 /*
- * Determine pointer to currently valid differential byte given a zone and
- * the item number.
- *
- * Preemption must be off
+ * Refresh the thresholds for each zone.
  */
-static inline s8 *diff_pointer(struct zone *zone, enum zone_stat_item item)
+static void refresh_zone_stat_thresholds(void)
 {
-        return &zone_pcp(zone, smp_processor_id())->vm_stat_diff[item];
+        struct zone *zone;
+        int cpu;
+        int threshold;
+
+        for_each_zone(zone) {
+
+                if (!zone->present_pages)
+                        continue;
+
+                threshold = calculate_threshold(zone);
+
+                for_each_online_cpu(cpu)
+                        zone_pcp(zone, cpu)->stat_threshold = threshold;
+        }
 }
 
 /*
@@ -133,17 +189,16 @@ static inline s8 *diff_pointer(struct zone *zone, enum zone_stat_item item)
 void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
                                 int delta)
 {
-        s8 *p;
+        struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+        s8 *p = pcp->vm_stat_diff + item;
         long x;
 
-        p = diff_pointer(zone, item);
         x = delta + *p;
 
-        if (unlikely(x > STAT_THRESHOLD || x < -STAT_THRESHOLD)) {
+        if (unlikely(x > pcp->stat_threshold || x < -pcp->stat_threshold)) {
                 zone_page_state_add(x, zone, item);
                 x = 0;
         }
-
         *p = x;
 }
 EXPORT_SYMBOL(__mod_zone_page_state);
@@ -172,10 +227,12 @@ EXPORT_SYMBOL(mod_zone_page_state);
  * No overflow check is necessary and therefore the differential can be
  * incremented or decremented in place which may allow the compilers to
  * generate better code.
- *
  * The increment or decrement is known and therefore one boundary check can
  * be omitted.
  *
+ * NOTE: These functions are very performance sensitive. Change only
+ * with care.
+ *
  * Some processors have inc/dec instructions that are atomic vs an interrupt.
  * However, the code must first determine the differential location in a zone
  * based on the processor number and then inc/dec the counter. There is no
@@ -185,13 +242,16 @@ EXPORT_SYMBOL(mod_zone_page_state);
  */
 static void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
 {
-        s8 *p = diff_pointer(zone, item);
+        struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+        s8 *p = pcp->vm_stat_diff + item;
 
         (*p)++;
 
-        if (unlikely(*p > STAT_THRESHOLD)) {
-                zone_page_state_add(*p, zone, item);
-                *p = 0;
+        if (unlikely(*p > pcp->stat_threshold)) {
+                int overstep = pcp->stat_threshold / 2;
+
+                zone_page_state_add(*p + overstep, zone, item);
+                *p = -overstep;
         }
 }
 
@@ -204,13 +264,16 @@ EXPORT_SYMBOL(__inc_zone_page_state);
 void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
 {
         struct zone *zone = page_zone(page);
-        s8 *p = diff_pointer(zone, item);
+        struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+        s8 *p = pcp->vm_stat_diff + item;
 
         (*p)--;
 
-        if (unlikely(*p < -STAT_THRESHOLD)) {
-                zone_page_state_add(*p, zone, item);
-                *p = 0;
+        if (unlikely(*p < - pcp->stat_threshold)) {
+                int overstep = pcp->stat_threshold / 2;
+
+                zone_page_state_add(*p - overstep, zone, item);
+                *p = overstep;
         }
 }
 EXPORT_SYMBOL(__dec_zone_page_state);
@@ -239,19 +302,9 @@ EXPORT_SYMBOL(inc_zone_page_state);
 void dec_zone_page_state(struct page *page, enum zone_stat_item item)
 {
         unsigned long flags;
-        struct zone *zone;
-        s8 *p;
 
-        zone = page_zone(page);
         local_irq_save(flags);
-        p = diff_pointer(zone, item);
-
-        (*p)--;
-
-        if (unlikely(*p < -STAT_THRESHOLD)) {
-                zone_page_state_add(*p, zone, item);
-                *p = 0;
-        }
+        __dec_zone_page_state(page, item);
         local_irq_restore(flags);
 }
 EXPORT_SYMBOL(dec_zone_page_state);
@@ -525,6 +578,10 @@ static int zoneinfo_show(struct seq_file *m, void *arg)
                                            pageset->pcp[j].high,
                                            pageset->pcp[j].batch);
                         }
+#ifdef CONFIG_SMP
+                        seq_printf(m, "\n  vm stats threshold: %d",
+                                        pageset->stat_threshold);
+#endif
                 }
                 seq_printf(m,
                            "\n  all_unreclaimable: %u"
@@ -613,3 +670,35 @@ struct seq_operations vmstat_op = {
 
 #endif /* CONFIG_PROC_FS */
 
+#ifdef CONFIG_SMP
+/*
+ * Use the cpu notifier to insure that the thresholds are recalculated
+ * when necessary.
+ */
+static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb,
+                unsigned long action,
+                void *hcpu)
+{
+        switch (action) {
+                case CPU_UP_PREPARE:
+                case CPU_UP_CANCELED:
+                case CPU_DEAD:
+                        refresh_zone_stat_thresholds();
+                        break;
+                default:
+                        break;
+        }
+        return NOTIFY_OK;
+}
+
+static struct notifier_block __cpuinitdata vmstat_notifier =
+        { &vmstat_cpuup_callback, NULL, 0 };
+
+int __init setup_vmstat(void)
+{
+        refresh_zone_stat_thresholds();
+        register_cpu_notifier(&vmstat_notifier);
+        return 0;
+}
+module_init(setup_vmstat)
+#endif
diff --git a/sound/oss/Kconfig b/sound/oss/Kconfig
index 1b7c3dfc2b41..97e38b665587 100644
--- a/sound/oss/Kconfig
+++ b/sound/oss/Kconfig
@@ -5,6 +5,20 @@
 #
 # Prompt user for primary drivers.
 
+config OSS_OBSOLETE_DRIVER
+        bool "Obsolete OSS drivers"
+        depends on SOUND_PRIME
+        help
+          This option enables support for obsolete OSS drivers that
+          are scheduled for removal in the near future since there
+          are ALSA drivers for the same hardware.
+
+          Please contact Adrian Bunk <bunk@stusta.de> if you had to
+          say Y here because your soundcard is not properly supported
+          by ALSA.
+
+          If unsure, say N.
+
 config SOUND_BT878
         tristate "BT878 audio dma"
         depends on SOUND_PRIME && PCI
@@ -23,7 +37,7 @@ config SOUND_BT878
 
 config SOUND_EMU10K1
         tristate "Creative SBLive! (EMU10K1)"
-        depends on SOUND_PRIME && PCI
+        depends on SOUND_PRIME && PCI && OSS_OBSOLETE_DRIVER
         ---help---
           Say Y or M if you have a PCI sound card using the EMU10K1 chipset,
           such as the Creative SBLive!, SB PCI512 or Emu-APS.
@@ -49,7 +63,7 @@ config MIDI_EMU10K1
 
 config SOUND_FUSION
         tristate "Crystal SoundFusion (CS4280/461x)"
-        depends on SOUND_PRIME && PCI
+        depends on SOUND_PRIME && PCI && OSS_OBSOLETE_DRIVER
         help
           This module drives the Crystal SoundFusion devices (CS4280/46xx
           series) when wired as native sound drivers with AC97 codecs.  If
@@ -440,7 +454,7 @@ config SOUND_DMAP
 
 config SOUND_AD1816
         tristate "AD1816(A) based cards (EXPERIMENTAL)"
-        depends on EXPERIMENTAL && SOUND_OSS
+        depends on EXPERIMENTAL && SOUND_OSS && OSS_OBSOLETE_DRIVER
         help
           Say M here if you have a sound card based on the Analog Devices
           AD1816(A) chip.
@@ -450,21 +464,21 @@ config SOUND_AD1816
 
 config SOUND_AD1889
         tristate "AD1889 based cards (AD1819 codec) (EXPERIMENTAL)"
-        depends on EXPERIMENTAL && SOUND_OSS && PCI
+        depends on EXPERIMENTAL && SOUND_OSS && PCI && OSS_OBSOLETE_DRIVER
         help
           Say M here if you have a sound card based on the Analog Devices
           AD1889 chip.
 
 config SOUND_ADLIB
         tristate "Adlib Cards"
-        depends on SOUND_OSS
+        depends on SOUND_OSS && OSS_OBSOLETE_DRIVER
         help
           Includes ASB 64 4D. Information on programming AdLib cards is
           available at <http://www.itsnet.com/home/ldragon/Specs/adlib.html>.
 
 config SOUND_ACI_MIXER
         tristate "ACI mixer (miroSOUND PCM1-pro/PCM12/PCM20)"
-        depends on SOUND_OSS
+        depends on SOUND_OSS && OSS_OBSOLETE_DRIVER
         ---help---
           ACI (Audio Command Interface) is a protocol used to communicate with
           the microcontroller on some sound cards produced by miro and
@@ -586,7 +600,7 @@ config SOUND_MPU401
 
 config SOUND_NM256
         tristate "NM256AV/NM256ZX audio support"
-        depends on SOUND_OSS
+        depends on SOUND_OSS && OSS_OBSOLETE_DRIVER
         help
           Say M here to include audio support for the NeoMagic 256AV/256ZX
           chipsets. These are the audio chipsets found in the Sony
@@ -706,7 +720,7 @@ config SOUND_YM3812
 
 config SOUND_OPL3SA2
         tristate "Yamaha OPL3-SA2 and SA3 based PnP cards"
-        depends on SOUND_OSS
+        depends on SOUND_OSS && OSS_OBSOLETE_DRIVER
         help
           Say Y or M if you have a card based on one of these Yamaha sound
           chipsets or the "SAx", which is actually a SA3. Read
diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index 0abf2808d59f..51e83d7a839a 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -573,7 +573,7 @@ AC97_SINGLE("PC Speaker Playback Volume", AC97_PC_BEEP, 1, 15, 1)
 };
 
 static const struct snd_kcontrol_new snd_ac97_controls_mic_boost =
-        AC97_SINGLE("Mic Boost (+20dB) Switch", AC97_MIC, 6, 1, 0);
+        AC97_SINGLE("Mic Boost (+20dB)", AC97_MIC, 6, 1, 0);
 
 
 static const char* std_rec_sel[] = {"Mic", "CD", "Video", "Aux", "Line", "Mix", "Mix Mono", "Phone"};
@@ -615,7 +615,7 @@ AC97_SINGLE("Simulated Stereo Enhancement", AC97_GENERAL_PURPOSE, 14, 1, 0),
 AC97_SINGLE("3D Control - Switch", AC97_GENERAL_PURPOSE, 13, 1, 0),
 AC97_SINGLE("Loudness (bass boost)", AC97_GENERAL_PURPOSE, 12, 1, 0),
 AC97_ENUM("Mono Output Select", std_enum[2]),
-AC97_ENUM("Mic Select Capture Switch", std_enum[3]),
+AC97_ENUM("Mic Select", std_enum[3]),
 AC97_SINGLE("ADC/DAC Loopback", AC97_GENERAL_PURPOSE, 7, 1, 0)
 };