32 files changed, 525 insertions, 1216 deletions

diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c
index 4c1fc65a8b3d..3be8ab2a886a 100644
--- a/Documentation/lguest/lguest.c
+++ b/Documentation/lguest/lguest.c
@@ -131,6 +131,9 @@ struct device
         /* Any queues attached to this device */
         struct virtqueue *vq;
 
+        /* Handle status being finalized (ie. feature bits stable). */
+        void (*ready)(struct device *me);
+
         /* Device-specific data. */
         void *priv;
 };
@@ -925,24 +928,40 @@ static void enable_fd(int fd, struct virtqueue *vq)
         write(waker_fd, &vq->dev->fd, sizeof(vq->dev->fd));
 }
 
-/* When the Guest asks us to reset a device, it's is fairly easy. */
-static void reset_device(struct device *dev)
+/* When the Guest tells us they updated the status field, we handle it. */
+static void update_device_status(struct device *dev)
 {
         struct virtqueue *vq;
 
-        verbose("Resetting device %s\n", dev->name);
-        /* Clear the status. */
-        dev->desc->status = 0;
+        /* This is a reset. */
+        if (dev->desc->status == 0) {
+                verbose("Resetting device %s\n", dev->name);
 
-        /* Clear any features they've acked. */
-        memset(get_feature_bits(dev) + dev->desc->feature_len, 0,
-               dev->desc->feature_len);
+                /* Clear any features they've acked. */
+                memset(get_feature_bits(dev) + dev->desc->feature_len, 0,
+                       dev->desc->feature_len);
 
-        /* Zero out the virtqueues. */
-        for (vq = dev->vq; vq; vq = vq->next) {
-                memset(vq->vring.desc, 0,
-                       vring_size(vq->config.num, getpagesize()));
-                vq->last_avail_idx = 0;
+                /* Zero out the virtqueues. */
+                for (vq = dev->vq; vq; vq = vq->next) {
+                        memset(vq->vring.desc, 0,
+                               vring_size(vq->config.num, getpagesize()));
+                        vq->last_avail_idx = 0;
+                }
+        } else if (dev->desc->status & VIRTIO_CONFIG_S_FAILED) {
+                warnx("Device %s configuration FAILED", dev->name);
+        } else if (dev->desc->status & VIRTIO_CONFIG_S_DRIVER_OK) {
+                unsigned int i;
+
+                verbose("Device %s OK: offered", dev->name);
+                for (i = 0; i < dev->desc->feature_len; i++)
+                        verbose(" %08x", get_feature_bits(dev)[i]);
+                verbose(", accepted");
+                for (i = 0; i < dev->desc->feature_len; i++)
+                        verbose(" %08x", get_feature_bits(dev)
+                                [dev->desc->feature_len+i]);
+
+                if (dev->ready)
+                        dev->ready(dev);
         }
 }
 
@@ -954,9 +973,9 @@ static void handle_output(int fd, unsigned long addr)
 
         /* Check each device and virtqueue. */
         for (i = devices.dev; i; i = i->next) {
-                /* Notifications to device descriptors reset the device. */
+                /* Notifications to device descriptors update device status. */
                 if (from_guest_phys(addr) == i->desc) {
-                        reset_device(i);
+                        update_device_status(i);
                         return;
                 }
 
@@ -1170,6 +1189,7 @@ static struct device *new_device(const char *name, u16 type, int fd,
         dev->handle_input = handle_input;
         dev->name = name;
         dev->vq = NULL;
+        dev->ready = NULL;
 
         /* Append to device list.  Prepending to a single-linked list is
          * easier, but the user expects the devices to be arranged on the bus
@@ -1398,7 +1418,7 @@ static bool service_io(struct device *dev)
         struct vblk_info *vblk = dev->priv;
         unsigned int head, out_num, in_num, wlen;
         int ret;
-        struct virtio_blk_inhdr *in;
+        u8 *in;
         struct virtio_blk_outhdr *out;
         struct iovec iov[dev->vq->vring.num];
         off64_t off;
@@ -1416,7 +1436,7 @@ static bool service_io(struct device *dev)
                      head, out_num, in_num);
 
         out = convert(&iov[0], struct virtio_blk_outhdr);
-        in = convert(&iov[out_num+in_num-1], struct virtio_blk_inhdr);
+        in = convert(&iov[out_num+in_num-1], u8);
         off = out->sector * 512;
 
         /* The block device implements "barriers", where the Guest indicates
@@ -1430,7 +1450,7 @@ static bool service_io(struct device *dev)
          * It'd be nice if we supported eject, for example, but we don't. */
         if (out->type & VIRTIO_BLK_T_SCSI_CMD) {
                 fprintf(stderr, "Scsi commands unsupported\n");
-                in->status = VIRTIO_BLK_S_UNSUPP;
+                *in = VIRTIO_BLK_S_UNSUPP;
                 wlen = sizeof(*in);
         } else if (out->type & VIRTIO_BLK_T_OUT) {
                 /* Write */
@@ -1453,7 +1473,7 @@ static bool service_io(struct device *dev)
                         errx(1, "Write past end %llu+%u", off, ret);
                 }
                 wlen = sizeof(*in);
-                in->status = (ret >= 0 ? VIRTIO_BLK_S_OK : VIRTIO_BLK_S_IOERR);
+                *in = (ret >= 0 ? VIRTIO_BLK_S_OK : VIRTIO_BLK_S_IOERR);
         } else {
                 /* Read */
 
@@ -1466,10 +1486,10 @@ static bool service_io(struct device *dev)
                 verbose("READ from sector %llu: %i\n", out->sector, ret);
                 if (ret >= 0) {
                         wlen = sizeof(*in) + ret;
-                        in->status = VIRTIO_BLK_S_OK;
+                        *in = VIRTIO_BLK_S_OK;
                 } else {
                         wlen = sizeof(*in);
-                        in->status = VIRTIO_BLK_S_IOERR;
+                        *in = VIRTIO_BLK_S_IOERR;
                 }
         }
 
diff --git a/arch/ia64/ia32/ia32_signal.c b/arch/ia64/ia32/ia32_signal.c
index 256a7faeda07..b763ca19ef17 100644
--- a/arch/ia64/ia32/ia32_signal.c
+++ b/arch/ia64/ia32/ia32_signal.c
@@ -463,7 +463,7 @@ sys32_sigsuspend (int history0, int history1, old_sigset_t mask)
 
         current->state = TASK_INTERRUPTIBLE;
         schedule();
-        set_thread_flag(TIF_RESTORE_SIGMASK);
+        set_restore_sigmask();
         return -ERESTARTNOHAND;
 }
 
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index c7467f863c7a..19709a079635 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -966,7 +966,7 @@ acpi_map_iosapics (void)
 fs_initcall(acpi_map_iosapics);
 #endif                          /* CONFIG_ACPI_NUMA */
 
-int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
+int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 {
         int err;
 
diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c
index 6dee579f205f..7fd18f54c056 100644
--- a/arch/ia64/kernel/irq.c
+++ b/arch/ia64/kernel/irq.c
@@ -183,10 +183,10 @@ void fixup_irqs(void)
 {
         unsigned int irq;
         extern void ia64_process_pending_intr(void);
-        extern void ia64_disable_timer(void);
         extern volatile int time_keeper_id;
 
-        ia64_disable_timer();
+        /* Mask ITV to disable timer */
+        ia64_set_itv(1 << 16);
 
         /*
          * Find a new timesync master
diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
index 396004e8cd14..4547a2092af9 100644
--- a/arch/ia64/kernel/palinfo.c
+++ b/arch/ia64/kernel/palinfo.c
@@ -1053,7 +1053,7 @@ static int __cpuinit palinfo_cpu_callback(struct notifier_block *nfb,
         return NOTIFY_OK;
 }
 
-static struct notifier_block palinfo_cpu_notifier __cpuinitdata =
+static struct notifier_block __refdata palinfo_cpu_notifier =
 {
         .notifier_call = palinfo_cpu_callback,
         .priority = 0,
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 7fbb51e10bbe..c1ad27de2dd2 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -867,7 +867,7 @@ pfm_rvfree(void *mem, unsigned long size)
 }
 
 static pfm_context_t *
-pfm_context_alloc(void)
+pfm_context_alloc(int ctx_flags)
 {
         pfm_context_t *ctx;
 
@@ -878,6 +878,46 @@ pfm_context_alloc(void)
         ctx = kzalloc(sizeof(pfm_context_t), GFP_KERNEL);
         if (ctx) {
                 DPRINT(("alloc ctx @%p\n", ctx));
+
+                /*
+                 * init context protection lock
+                 */
+                spin_lock_init(&ctx->ctx_lock);
+
+                /*
+                 * context is unloaded
+                 */
+                ctx->ctx_state = PFM_CTX_UNLOADED;
+
+                /*
+                 * initialization of context's flags
+                 */
+                ctx->ctx_fl_block       = (ctx_flags & PFM_FL_NOTIFY_BLOCK) ? 1 : 0;
+                ctx->ctx_fl_system      = (ctx_flags & PFM_FL_SYSTEM_WIDE) ? 1: 0;
+                ctx->ctx_fl_no_msg      = (ctx_flags & PFM_FL_OVFL_NO_MSG) ? 1: 0;
+                /*
+                 * will move to set properties
+                 * ctx->ctx_fl_excl_idle   = (ctx_flags & PFM_FL_EXCL_IDLE) ? 1: 0;
+                 */
+
+                /*
+                 * init restart semaphore to locked
+                 */
+                init_completion(&ctx->ctx_restart_done);
+
+                /*
+                 * activation is used in SMP only
+                 */
+                ctx->ctx_last_activation = PFM_INVALID_ACTIVATION;
+                SET_LAST_CPU(ctx, -1);
+
+                /*
+                 * initialize notification message queue
+                 */
+                ctx->ctx_msgq_head = ctx->ctx_msgq_tail = 0;
+                init_waitqueue_head(&ctx->ctx_msgq_wait);
+                init_waitqueue_head(&ctx->ctx_zombieq);
+
         }
         return ctx;
 }
@@ -2165,28 +2205,21 @@ static struct dentry_operations pfmfs_dentry_operations = {
 };
 
 
-static int
-pfm_alloc_fd(struct file **cfile)
+static struct file *
+pfm_alloc_file(pfm_context_t *ctx)
 {
-        int fd, ret = 0;
-        struct file *file = NULL;
-        struct inode * inode;
+        struct file *file;
+        struct inode *inode;
+        struct dentry *dentry;
         char name[32];
         struct qstr this;
 
-        fd = get_unused_fd();
-        if (fd < 0) return -ENFILE;
-
-        ret = -ENFILE;
-
-        file = get_empty_filp();
-        if (!file) goto out;
-
         /*
          * allocate a new inode
          */
         inode = new_inode(pfmfs_mnt->mnt_sb);
-        if (!inode) goto out;
+        if (!inode)
+                return ERR_PTR(-ENOMEM);
 
         DPRINT(("new inode ino=%ld @%p\n", inode->i_ino, inode));
 
@@ -2199,59 +2232,28 @@ pfm_alloc_fd(struct file **cfile)
         this.len  = strlen(name);
         this.hash = inode->i_ino;
 
-        ret = -ENOMEM;
-
         /*
          * allocate a new dcache entry
          */
-        file->f_path.dentry = d_alloc(pfmfs_mnt->mnt_sb->s_root, &this);
-        if (!file->f_path.dentry) goto out;
+        dentry = d_alloc(pfmfs_mnt->mnt_sb->s_root, &this);
+        if (!dentry) {
+                iput(inode);
+                return ERR_PTR(-ENOMEM);
+        }
 
-        file->f_path.dentry->d_op = &pfmfs_dentry_operations;
+        dentry->d_op = &pfmfs_dentry_operations;
+        d_add(dentry, inode);
 
-        d_add(file->f_path.dentry, inode);
-        file->f_path.mnt = mntget(pfmfs_mnt);
-        file->f_mapping = inode->i_mapping;
+        file = alloc_file(pfmfs_mnt, dentry, FMODE_READ, &pfm_file_ops);
+        if (!file) {
+                dput(dentry);
+                return ERR_PTR(-ENFILE);
+        }
 
-        file->f_op    = &pfm_file_ops;
-        file->f_mode  = FMODE_READ;
         file->f_flags = O_RDONLY;
-        file->f_pos   = 0;
-
-        /*
-         * may have to delay until context is attached?
-         */
-        fd_install(fd, file);
-
-        /*
-         * the file structure we will use
-         */
-        *cfile = file;
-
-        return fd;
-out:
-        if (file) put_filp(file);
-        put_unused_fd(fd);
-        return ret;
-}
-
-static void
-pfm_free_fd(int fd, struct file *file)
-{
-        struct files_struct *files = current->files;
-        struct fdtable *fdt;
+        file->private_data = ctx;
 
-        /* 
-         * there ie no fd_uninstall(), so we do it here
-         */
-        spin_lock(&files->file_lock);
-        fdt = files_fdtable(files);
-        rcu_assign_pointer(fdt->fd[fd], NULL);
-        spin_unlock(&files->file_lock);
-
-        if (file)
-                put_filp(file);
-        put_unused_fd(fd);
+        return file;
 }
 
 static int
@@ -2475,6 +2477,7 @@ pfm_setup_buffer_fmt(struct task_struct *task, struct file *filp, pfm_context_t
 
         /* link buffer format and context */
         ctx->ctx_buf_fmt = fmt;
+        ctx->ctx_fl_is_sampling = 1; /* assume record() is defined */
 
         /*
          * check if buffer format wants to use perfmon buffer allocation/mapping service
@@ -2669,78 +2672,45 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg
 {
         pfarg_context_t *req = (pfarg_context_t *)arg;
         struct file *filp;
+        struct path path;
         int ctx_flags;
+        int fd;
         int ret;
 
         /* let's check the arguments first */
         ret = pfarg_is_sane(current, req);
-        if (ret < 0) return ret;
+        if (ret < 0)
+                return ret;
 
         ctx_flags = req->ctx_flags;
 
         ret = -ENOMEM;
 
-        ctx = pfm_context_alloc();
-        if (!ctx) goto error;
+        fd = get_unused_fd();
+        if (fd < 0)
+                return fd;
 
-        ret = pfm_alloc_fd(&filp);
-        if (ret < 0) goto error_file;
+        ctx = pfm_context_alloc(ctx_flags);
+        if (!ctx)
+                goto error;
 
-        req->ctx_fd = ctx->ctx_fd = ret;
+        filp = pfm_alloc_file(ctx);
+        if (IS_ERR(filp)) {
+                ret = PTR_ERR(filp);
+                goto error_file;
+        }
 
-        /*
-         * attach context to file
-         */
-        filp->private_data = ctx;
+        req->ctx_fd = ctx->ctx_fd = fd;
 
         /*
          * does the user want to sample?
          */
         if (pfm_uuid_cmp(req->ctx_smpl_buf_id, pfm_null_uuid)) {
                 ret = pfm_setup_buffer_fmt(current, filp, ctx, ctx_flags, 0, req);
-                if (ret) goto buffer_error;
+                if (ret)
+                        goto buffer_error;
         }
 
-        /*
-         * init context protection lock
-         */
-        spin_lock_init(&ctx->ctx_lock);
-
-        /*
-         * context is unloaded
-         */
-        ctx->ctx_state = PFM_CTX_UNLOADED;
-
-        /*
-         * initialization of context's flags
-         */
-        ctx->ctx_fl_block       = (ctx_flags & PFM_FL_NOTIFY_BLOCK) ? 1 : 0;
-        ctx->ctx_fl_system      = (ctx_flags & PFM_FL_SYSTEM_WIDE) ? 1: 0;
-        ctx->ctx_fl_is_sampling = ctx->ctx_buf_fmt ? 1 : 0; /* assume record() is defined */
-        ctx->ctx_fl_no_msg      = (ctx_flags & PFM_FL_OVFL_NO_MSG) ? 1: 0;
-        /*
-         * will move to set properties
-         * ctx->ctx_fl_excl_idle   = (ctx_flags & PFM_FL_EXCL_IDLE) ? 1: 0;
-         */
-
-        /*
-         * init restart semaphore to locked
-         */
-        init_completion(&ctx->ctx_restart_done);
-
-        /*
-         * activation is used in SMP only
-         */
-        ctx->ctx_last_activation = PFM_INVALID_ACTIVATION;
-        SET_LAST_CPU(ctx, -1);
-
-        /*
-         * initialize notification message queue
-         */
-        ctx->ctx_msgq_head = ctx->ctx_msgq_tail = 0;
-        init_waitqueue_head(&ctx->ctx_msgq_wait);
-        init_waitqueue_head(&ctx->ctx_zombieq);
-
         DPRINT(("ctx=%p flags=0x%x system=%d notify_block=%d excl_idle=%d no_msg=%d ctx_fd=%d \n",
                 ctx,
                 ctx_flags,
@@ -2755,10 +2725,14 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg
          */
         pfm_reset_pmu_state(ctx);
 
+        fd_install(fd, filp);
+
         return 0;
 
 buffer_error:
-        pfm_free_fd(ctx->ctx_fd, filp);
+        path = filp->f_path;
+        put_filp(filp);
+        path_put(&path);
 
         if (ctx->ctx_buf_fmt) {
                 pfm_buf_fmt_exit(ctx->ctx_buf_fmt, current, NULL, regs);
@@ -2767,6 +2741,7 @@ error_file:
         pfm_context_free(ctx);
 
 error:
+        put_unused_fd(fd);
         return ret;
 }
 
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index 5740296c35af..19c5a78636fc 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -464,7 +464,7 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
         if (!user_mode(&scr->pt))
                 return;
 
-        if (test_thread_flag(TIF_RESTORE_SIGMASK))
+        if (current_thread_info()->status & TS_RESTORE_SIGMASK)
                 oldset = &current->saved_sigmask;
         else
                 oldset = &current->blocked;
@@ -530,12 +530,13 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
                  * continue to iterate in this loop so we can deliver the SIGSEGV...
                  */
                 if (handle_signal(signr, &ka, &info, oldset, scr)) {
-                        /* a signal was successfully delivered; the saved
+                        /*
+                         * A signal was successfully delivered; the saved
                          * sigmask will have been stored in the signal frame,
                          * and will be restored by sigreturn, so we can simply
-                         * clear the TIF_RESTORE_SIGMASK flag */
-                        if (test_thread_flag(TIF_RESTORE_SIGMASK))
-                                clear_thread_flag(TIF_RESTORE_SIGMASK);
+                         * clear the TS_RESTORE_SIGMASK flag.
+                         */
+                        current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
                         return;
                 }
         }
@@ -566,8 +567,8 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
 
         /* if there's no signal to deliver, we just put the saved sigmask
          * back */
-        if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
-                clear_thread_flag(TIF_RESTORE_SIGMASK);
+        if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+                current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
                 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
         }
 }
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 9a9d4c489330..983296f1c813 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -98,8 +98,33 @@ unlock_ipi_calllock(void)
         spin_unlock_irq(&call_lock);
 }
 
+static inline void
+handle_call_data(void)
+{
+        struct call_data_struct *data;
+        void (*func)(void *info);
+        void *info;
+        int wait;
+
+        /* release the 'pointer lock' */
+        data = (struct call_data_struct *)call_data;
+        func = data->func;
+        info = data->info;
+        wait = data->wait;
+
+        mb();
+        atomic_inc(&data->started);
+        /* At this point the structure may be gone unless wait is true. */
+        (*func)(info);
+
+        /* Notify the sending CPU that the task is done. */
+        mb();
+        if (wait)
+                atomic_inc(&data->finished);
+}
+
 static void
-stop_this_cpu (void)
+stop_this_cpu(void)
 {
         /*
          * Remove this CPU:
@@ -138,44 +163,21 @@ handle_IPI (int irq, void *dev_id)
                         ops &= ~(1 << which);
 
                         switch (which) {
-                              case IPI_CALL_FUNC:
-                              {
-                                      struct call_data_struct *data;
-                                      void (*func)(void *info);
-                                      void *info;
-                                      int wait;
-
-                                      /* release the 'pointer lock' */
-                                      data = (struct call_data_struct *) call_data;
-                                      func = data->func;
-                                      info = data->info;
-                                      wait = data->wait;
-
-                                      mb();
-                                      atomic_inc(&data->started);
-                                      /*
-                                       * At this point the structure may be gone unless
-                                       * wait is true.
-                                       */
-                                      (*func)(info);
-
-                                      /* Notify the sending CPU that the task is done.  */
-                                      mb();
-                                      if (wait)
-                                              atomic_inc(&data->finished);
-                              }
-                              break;
-
-                              case IPI_CPU_STOP:
+                        case IPI_CALL_FUNC:
+                                handle_call_data();
+                                break;
+
+                        case IPI_CPU_STOP:
                                 stop_this_cpu();
                                 break;
 #ifdef CONFIG_KEXEC
-                              case IPI_KDUMP_CPU_STOP:
+                        case IPI_KDUMP_CPU_STOP:
                                 unw_init_running(kdump_cpu_freeze, NULL);
                                 break;
 #endif
-                              default:
-                                printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n", this_cpu, which);
+                        default:
+                                printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n",
+                                                this_cpu, which);
                                 break;
                         }
                 } while (ops);
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 48e15a51782f..8c73643f2d66 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -379,11 +379,6 @@ static struct irqaction timer_irqaction = {
         .name =         "timer"
 };
 
-void __devinit ia64_disable_timer(void)
-{
-        ia64_set_itv(1 << 16);
-}
-
 void __init
 time_init (void)
 {
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index abb17a613b17..26228e2d01ae 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -36,9 +36,11 @@ void arch_fix_phys_package_id(int num, u32 slot)
 }
 EXPORT_SYMBOL_GPL(arch_fix_phys_package_id);
 
-int arch_register_cpu(int num)
+
+#ifdef CONFIG_HOTPLUG_CPU
+int __ref arch_register_cpu(int num)
 {
-#if defined (CONFIG_ACPI) && defined (CONFIG_HOTPLUG_CPU)
+#ifdef CONFIG_ACPI
         /*
          * If CPEI can be re-targetted or if this is not
          * CPEI target, then it is hotpluggable
@@ -47,19 +49,21 @@ int arch_register_cpu(int num)
                 sysfs_cpus[num].cpu.hotpluggable = 1;
         map_cpu_to_node(num, node_cpuid[num].nid);
 #endif
-
         return register_cpu(&sysfs_cpus[num].cpu, num);
 }
-
-#ifdef CONFIG_HOTPLUG_CPU
+EXPORT_SYMBOL(arch_register_cpu);
 
 void arch_unregister_cpu(int num)
 {
         unregister_cpu(&sysfs_cpus[num].cpu);
         unmap_cpu_from_node(num, cpu_to_node(num));
 }
-EXPORT_SYMBOL(arch_register_cpu);
 EXPORT_SYMBOL(arch_unregister_cpu);
+#else
+static int __init arch_register_cpu(int num)
+{
+        return register_cpu(&sysfs_cpus[num].cpu, num);
+}
 #endif /*CONFIG_HOTPLUG_CPU*/
 
 
diff --git a/arch/m32r/Makefile b/arch/m32r/Makefile
index 4072a07ebf8e..469766b24e22 100644
--- a/arch/m32r/Makefile
+++ b/arch/m32r/Makefile
@@ -5,6 +5,8 @@
 # architecture-specific flags and dependencies.
 #
 
+KBUILD_DEFCONFIG := m32700ut.smp_defconfig
+
 LDFLAGS         :=
 OBJCOPYFLAGS    := -O binary -R .note -R .comment -S
 LDFLAGS_vmlinux :=
diff --git a/arch/m32r/defconfig b/arch/m32r/defconfig
deleted file mode 100644
index af3b98179113..000000000000
--- a/arch/m32r/defconfig
+++ /dev/null
@@ -1,863 +0,0 @@
-#
-# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.23-rc1
-# Wed Aug  1 17:22:35 2007
-#
-CONFIG_M32R=y
-CONFIG_GENERIC_ISA_DMA=y
-CONFIG_ZONE_DMA=y
-CONFIG_GENERIC_HARDIRQS=y
-CONFIG_GENERIC_IRQ_PROBE=y
-CONFIG_NO_IOPORT=y
-CONFIG_NO_DMA=y
-CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
-
-#
-# Code maturity level options
-#
-CONFIG_EXPERIMENTAL=y
-CONFIG_LOCK_KERNEL=y
-CONFIG_INIT_ENV_ARG_LIMIT=32
-
-#
-# General setup
-#
-CONFIG_LOCALVERSION=""
-CONFIG_LOCALVERSION_AUTO=y
-CONFIG_SWAP=y
-CONFIG_SYSVIPC=y
-CONFIG_SYSVIPC_SYSCTL=y
-# CONFIG_POSIX_MQUEUE is not set
-CONFIG_BSD_PROCESS_ACCT=y
-# CONFIG_BSD_PROCESS_ACCT_V3 is not set
-# CONFIG_TASKSTATS is not set
-# CONFIG_USER_NS is not set
-# CONFIG_AUDIT is not set
-CONFIG_IKCONFIG=y
-CONFIG_IKCONFIG_PROC=y
-CONFIG_LOG_BUF_SHIFT=15
-# CONFIG_CPUSETS is not set
-CONFIG_SYSFS_DEPRECATED=y
-# CONFIG_RELAY is not set
-# CONFIG_BLK_DEV_INITRD is not set
-# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
-CONFIG_SYSCTL=y
-CONFIG_EMBEDDED=y
-CONFIG_SYSCTL_SYSCALL=y
-# CONFIG_KALLSYMS is not set
-CONFIG_HOTPLUG=y
-CONFIG_PRINTK=y
-CONFIG_BUG=y
-CONFIG_ELF_CORE=y
-CONFIG_BASE_FULL=y
-# CONFIG_FUTEX is not set
-CONFIG_ANON_INODES=y
-# CONFIG_EPOLL is not set
-CONFIG_SIGNALFD=y
-CONFIG_TIMERFD=y
-CONFIG_EVENTFD=y
-CONFIG_SHMEM=y
-CONFIG_VM_EVENT_COUNTERS=y
-CONFIG_SLAB=y
-# CONFIG_SLUB is not set
-# CONFIG_SLOB is not set
-# CONFIG_TINY_SHMEM is not set
-CONFIG_BASE_SMALL=0
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
-# CONFIG_MODULE_FORCE_UNLOAD is not set
-# CONFIG_MODVERSIONS is not set
-# CONFIG_MODULE_SRCVERSION_ALL is not set
-CONFIG_KMOD=y
-CONFIG_STOP_MACHINE=y
-CONFIG_BLOCK=y
-# CONFIG_LBD is not set
-# CONFIG_BLK_DEV_IO_TRACE is not set
-# CONFIG_LSF is not set
-# CONFIG_BLK_DEV_BSG is not set
-
-#
-# IO Schedulers
-#
-CONFIG_IOSCHED_NOOP=y
-# CONFIG_IOSCHED_AS is not set
-CONFIG_IOSCHED_DEADLINE=y
-CONFIG_IOSCHED_CFQ=y
-# CONFIG_DEFAULT_AS is not set
-# CONFIG_DEFAULT_DEADLINE is not set
-CONFIG_DEFAULT_CFQ=y
-# CONFIG_DEFAULT_NOOP is not set
-CONFIG_DEFAULT_IOSCHED="cfq"
-
-#
-# Processor type and features
-#
-# CONFIG_PLAT_MAPPI is not set
-# CONFIG_PLAT_USRV is not set
-CONFIG_PLAT_M32700UT=y
-# CONFIG_PLAT_OPSPUT is not set
-# CONFIG_PLAT_OAKS32R is not set
-# CONFIG_PLAT_MAPPI2 is not set
-# CONFIG_PLAT_MAPPI3 is not set
-# CONFIG_PLAT_M32104UT is not set
-CONFIG_CHIP_M32700=y
-# CONFIG_CHIP_M32102 is not set
-# CONFIG_CHIP_M32104 is not set
-# CONFIG_CHIP_VDEC2 is not set
-# CONFIG_CHIP_OPSP is not set
-CONFIG_MMU=y
-CONFIG_TLB_ENTRIES=32
-CONFIG_ISA_M32R2=y
-CONFIG_ISA_DSP_LEVEL2=y
-CONFIG_ISA_DUAL_ISSUE=y
-CONFIG_BUS_CLOCK=50000000
-CONFIG_TIMER_DIVIDE=128
-# CONFIG_CPU_LITTLE_ENDIAN is not set
-CONFIG_MEMORY_START=0x08000000
-CONFIG_MEMORY_SIZE=0x01000000
-CONFIG_NOHIGHMEM=y
-CONFIG_ARCH_DISCONTIGMEM_ENABLE=y
-CONFIG_SELECT_MEMORY_MODEL=y
-# CONFIG_FLATMEM_MANUAL is not set
-CONFIG_DISCONTIGMEM_MANUAL=y
-# CONFIG_SPARSEMEM_MANUAL is not set
-CONFIG_DISCONTIGMEM=y
-CONFIG_FLAT_NODE_MEM_MAP=y
-CONFIG_NEED_MULTIPLE_NODES=y
-# CONFIG_SPARSEMEM_STATIC is not set
-CONFIG_SPLIT_PTLOCK_CPUS=4
-# CONFIG_RESOURCES_64BIT is not set
-CONFIG_ZONE_DMA_FLAG=1
-CONFIG_BOUNCE=y
-CONFIG_VIRT_TO_BUS=y
-CONFIG_IRAM_START=0x00f00000
-CONFIG_IRAM_SIZE=0x00080000
-CONFIG_RWSEM_GENERIC_SPINLOCK=y
-# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
-# CONFIG_ARCH_HAS_ILOG2_U32 is not set
-# CONFIG_ARCH_HAS_ILOG2_U64 is not set
-CONFIG_GENERIC_FIND_NEXT_BIT=y
-CONFIG_GENERIC_HWEIGHT=y
-CONFIG_GENERIC_CALIBRATE_DELAY=y
-CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
-CONFIG_PREEMPT=y
-CONFIG_SMP=y
-# CONFIG_CHIP_M32700_TS1 is not set
-CONFIG_NR_CPUS=2
-CONFIG_NODES_SHIFT=1
-
-#
-# Bus options (PCI, PCMCIA, EISA, MCA, ISA)
-#
-# CONFIG_ARCH_SUPPORTS_MSI is not set
-# CONFIG_ISA is not set
-
-#
-# PCCARD (PCMCIA/CardBus) support
-#
-# CONFIG_PCCARD is not set
-
-#
-# Executable file formats
-#
-CONFIG_BINFMT_ELF=y
-# CONFIG_BINFMT_MISC is not set
-
-#
-# Networking
-#
-CONFIG_NET=y
-
-#
-# Networking options
-#
-CONFIG_PACKET=y
-# CONFIG_PACKET_MMAP is not set
-CONFIG_UNIX=y
-CONFIG_XFRM=y
-# CONFIG_XFRM_USER is not set
-# CONFIG_XFRM_SUB_POLICY is not set
-# CONFIG_XFRM_MIGRATE is not set
-# CONFIG_NET_KEY is not set
-CONFIG_INET=y
-# CONFIG_IP_MULTICAST is not set
-# CONFIG_IP_ADVANCED_ROUTER is not set
-CONFIG_IP_FIB_HASH=y
-CONFIG_IP_PNP=y
-CONFIG_IP_PNP_DHCP=y
-# CONFIG_IP_PNP_BOOTP is not set
-# CONFIG_IP_PNP_RARP is not set
-# CONFIG_NET_IPIP is not set
-# CONFIG_NET_IPGRE is not set
-# CONFIG_ARPD is not set
-# CONFIG_SYN_COOKIES is not set
-# CONFIG_INET_AH is not set
-# CONFIG_INET_ESP is not set
-# CONFIG_INET_IPCOMP is not set
-# CONFIG_INET_XFRM_TUNNEL is not set
-# CONFIG_INET_TUNNEL is not set
-CONFIG_INET_XFRM_MODE_TRANSPORT=y
-CONFIG_INET_XFRM_MODE_TUNNEL=y
-CONFIG_INET_XFRM_MODE_BEET=y
-CONFIG_INET_DIAG=y
-CONFIG_INET_TCP_DIAG=y
-# CONFIG_TCP_CONG_ADVANCED is not set
-CONFIG_TCP_CONG_CUBIC=y
-CONFIG_DEFAULT_TCP_CONG="cubic"
-# CONFIG_TCP_MD5SIG is not set
-# CONFIG_IPV6 is not set
-# CONFIG_INET6_XFRM_TUNNEL is not set
-# CONFIG_INET6_TUNNEL is not set
-# CONFIG_NETWORK_SECMARK is not set
-# CONFIG_NETFILTER is not set
-# CONFIG_IP_DCCP is not set
-# CONFIG_IP_SCTP is not set
-# CONFIG_TIPC is not set
-# CONFIG_ATM is not set
-# CONFIG_BRIDGE is not set
-# CONFIG_VLAN_8021Q is not set
-# CONFIG_DECNET is not set
-# CONFIG_LLC2 is not set
-# CONFIG_IPX is not set
-# CONFIG_ATALK is not set
-# CONFIG_X25 is not set
-# CONFIG_LAPB is not set
-# CONFIG_ECONET is not set
-# CONFIG_WAN_ROUTER is not set
-
-#
-# QoS and/or fair queueing
-#
-# CONFIG_NET_SCHED is not set
-
-#
-# Network testing
-#
-# CONFIG_NET_PKTGEN is not set
-# CONFIG_HAMRADIO is not set
-# CONFIG_IRDA is not set
-# CONFIG_BT is not set
-# CONFIG_AF_RXRPC is not set
-
-#
-# Wireless
-#
-# CONFIG_CFG80211 is not set
-# CONFIG_WIRELESS_EXT is not set
-# CONFIG_MAC80211 is not set
-# CONFIG_IEEE80211 is not set
-# CONFIG_RFKILL is not set
-# CONFIG_NET_9P is not set
-
-#
-# Device Drivers
-#
-
-#
-# Generic Driver Options
-#
-CONFIG_STANDALONE=y
-CONFIG_PREVENT_FIRMWARE_BUILD=y
-CONFIG_FW_LOADER=y
-# CONFIG_SYS_HYPERVISOR is not set
-# CONFIG_CONNECTOR is not set
-CONFIG_MTD=y
-# CONFIG_MTD_DEBUG is not set
-# CONFIG_MTD_CONCAT is not set
-CONFIG_MTD_PARTITIONS=y
-CONFIG_MTD_REDBOOT_PARTS=y
-CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-1
-# CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED is not set
-# CONFIG_MTD_REDBOOT_PARTS_READONLY is not set
-# CONFIG_MTD_CMDLINE_PARTS is not set
-
-#
-# User Modules And Translation Layers
-#
-# CONFIG_MTD_CHAR is not set
-CONFIG_MTD_BLKDEVS=y
-CONFIG_MTD_BLOCK=y
-# CONFIG_FTL is not set
-# CONFIG_NFTL is not set
-# CONFIG_INFTL is not set
-# CONFIG_RFD_FTL is not set
-# CONFIG_SSFDC is not set
-
-#
-# RAM/ROM/Flash chip drivers
-#
-CONFIG_MTD_CFI=m
-CONFIG_MTD_JEDECPROBE=m
-CONFIG_MTD_GEN_PROBE=m
-CONFIG_MTD_CFI_ADV_OPTIONS=y
-# CONFIG_MTD_CFI_NOSWAP is not set
-CONFIG_MTD_CFI_BE_BYTE_SWAP=y
-# CONFIG_MTD_CFI_LE_BYTE_SWAP is not set
-CONFIG_MTD_CFI_GEOMETRY=y
-CONFIG_MTD_MAP_BANK_WIDTH_1=y
-CONFIG_MTD_MAP_BANK_WIDTH_2=y
-CONFIG_MTD_MAP_BANK_WIDTH_4=y
-# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
-# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
-# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
-CONFIG_MTD_CFI_I1=y
-# CONFIG_MTD_CFI_I2 is not set
-# CONFIG_MTD_CFI_I4 is not set
-# CONFIG_MTD_CFI_I8 is not set
-# CONFIG_MTD_OTP is not set
-# CONFIG_MTD_CFI_INTELEXT is not set
-CONFIG_MTD_CFI_AMDSTD=m
-# CONFIG_MTD_CFI_STAA is not set
-CONFIG_MTD_CFI_UTIL=m
-# CONFIG_MTD_RAM is not set
-# CONFIG_MTD_ROM is not set
-# CONFIG_MTD_ABSENT is not set
-
-#
-# Mapping drivers for chip access
-#
-# CONFIG_MTD_COMPLEX_MAPPINGS is not set
-# CONFIG_MTD_PHYSMAP is not set
-# CONFIG_MTD_PLATRAM is not set
-
-#
-# Self-contained MTD device drivers
-#
-# CONFIG_MTD_SLRAM is not set
-# CONFIG_MTD_PHRAM is not set
-# CONFIG_MTD_MTDRAM is not set
-# CONFIG_MTD_BLOCK2MTD is not set
-
-#
-# Disk-On-Chip Device Drivers
-#
-# CONFIG_MTD_DOC2000 is not set
-# CONFIG_MTD_DOC2001 is not set
-# CONFIG_MTD_DOC2001PLUS is not set
-# CONFIG_MTD_NAND is not set
-# CONFIG_MTD_ONENAND is not set
-
-#
-# UBI - Unsorted block images
-#
-# CONFIG_MTD_UBI is not set
-# CONFIG_PARPORT is not set
-CONFIG_BLK_DEV=y
-# CONFIG_BLK_DEV_COW_COMMON is not set
-CONFIG_BLK_DEV_LOOP=y
-# CONFIG_BLK_DEV_CRYPTOLOOP is not set
-CONFIG_BLK_DEV_NBD=y
-CONFIG_BLK_DEV_RAM=y
-CONFIG_BLK_DEV_RAM_COUNT=16
-CONFIG_BLK_DEV_RAM_SIZE=4096
-CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
-# CONFIG_CDROM_PKTCDVD is not set
-CONFIG_ATA_OVER_ETH=m
-CONFIG_MISC_DEVICES=y
-# CONFIG_EEPROM_93CX6 is not set
-CONFIG_IDE=y
-CONFIG_IDE_MAX_HWIFS=4
-CONFIG_BLK_DEV_IDE=y
-
-#
-# Please see Documentation/ide.txt for help/info on IDE drives
-#
-# CONFIG_BLK_DEV_IDE_SATA is not set
-CONFIG_BLK_DEV_IDEDISK=y
-# CONFIG_IDEDISK_MULTI_MODE is not set
-CONFIG_BLK_DEV_IDECD=m
-# CONFIG_BLK_DEV_IDETAPE is not set
-# CONFIG_BLK_DEV_IDEFLOPPY is not set
-# CONFIG_BLK_DEV_IDESCSI is not set
-# CONFIG_IDE_TASK_IOCTL is not set
-CONFIG_IDE_PROC_FS=y
-
-#
-# IDE chipset support/bugfixes
-#
-CONFIG_IDE_GENERIC=y
-# CONFIG_IDEPCI_PCIBUS_ORDER is not set
-# CONFIG_IDE_ARM is not set
-# CONFIG_BLK_DEV_IDEDMA is not set
-# CONFIG_BLK_DEV_HD is not set
-
-#
-# SCSI device support
-#
-# CONFIG_RAID_ATTRS is not set
-CONFIG_SCSI=m
-# CONFIG_SCSI_DMA is not set
-# CONFIG_SCSI_TGT is not set
-# CONFIG_SCSI_NETLINK is not set
-CONFIG_SCSI_PROC_FS=y
-
-#
-# SCSI support type (disk, tape, CD-ROM)
-#
-CONFIG_BLK_DEV_SD=m
-# CONFIG_CHR_DEV_ST is not set
-# CONFIG_CHR_DEV_OSST is not set
-CONFIG_BLK_DEV_SR=m
-# CONFIG_BLK_DEV_SR_VENDOR is not set
-CONFIG_CHR_DEV_SG=m
-# CONFIG_CHR_DEV_SCH is not set
-
-#
-# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
-#
-CONFIG_SCSI_MULTI_LUN=y
-# CONFIG_SCSI_CONSTANTS is not set
-# CONFIG_SCSI_LOGGING is not set
-# CONFIG_SCSI_SCAN_ASYNC is not set
-CONFIG_SCSI_WAIT_SCAN=m
-
-#
-# SCSI Transports
-#
-# CONFIG_SCSI_SPI_ATTRS is not set
-# CONFIG_SCSI_FC_ATTRS is not set
-# CONFIG_SCSI_ISCSI_ATTRS is not set
-# CONFIG_SCSI_SAS_LIBSAS is not set
-CONFIG_SCSI_LOWLEVEL=y
-# CONFIG_ISCSI_TCP is not set
-# CONFIG_SCSI_DEBUG is not set
-# CONFIG_MD is not set
-CONFIG_NETDEVICES=y
-# CONFIG_NETDEVICES_MULTIQUEUE is not set
-# CONFIG_DUMMY is not set
-# CONFIG_BONDING is not set
-# CONFIG_MACVLAN is not set
-# CONFIG_EQUALIZER is not set
-# CONFIG_TUN is not set
-# CONFIG_PHYLIB is not set
-CONFIG_NET_ETHERNET=y
-CONFIG_MII=y
-CONFIG_SMC91X=y
-# CONFIG_NE2000 is not set
-CONFIG_NETDEV_1000=y
-CONFIG_NETDEV_10000=y
-
-#
-# Wireless LAN
-#
-# CONFIG_WLAN_PRE80211 is not set
-# CONFIG_WLAN_80211 is not set
-# CONFIG_WAN is not set
-# CONFIG_PPP is not set
-# CONFIG_SLIP is not set
-# CONFIG_SHAPER is not set
-# CONFIG_NETCONSOLE is not set
-# CONFIG_NETPOLL is not set
-# CONFIG_NET_POLL_CONTROLLER is not set
-# CONFIG_ISDN is not set
-# CONFIG_PHONE is not set
-
-#
-# Input device support
-#
-CONFIG_INPUT=y
-# CONFIG_INPUT_FF_MEMLESS is not set
-# CONFIG_INPUT_POLLDEV is not set
-
-#
-# Userland interfaces
-#
-# CONFIG_INPUT_MOUSEDEV is not set
-# CONFIG_INPUT_JOYDEV is not set
-# CONFIG_INPUT_TSDEV is not set
-# CONFIG_INPUT_EVDEV is not set
-# CONFIG_INPUT_EVBUG is not set
-
-#
-# Input Device Drivers
-#
-# CONFIG_INPUT_KEYBOARD is not set
-# CONFIG_INPUT_MOUSE is not set
-# CONFIG_INPUT_JOYSTICK is not set
-# CONFIG_INPUT_TABLET is not set
-# CONFIG_INPUT_TOUCHSCREEN is not set
-# CONFIG_INPUT_MISC is not set
-
-#
-# Hardware I/O ports
-#
-CONFIG_SERIO=y
-# CONFIG_SERIO_I8042 is not set
-CONFIG_SERIO_SERPORT=y
-# CONFIG_SERIO_LIBPS2 is not set
-# CONFIG_SERIO_RAW is not set
-# CONFIG_GAMEPORT is not set
-
-#
-# Character devices
-#
-CONFIG_VT=y
-CONFIG_VT_CONSOLE=y
-CONFIG_HW_CONSOLE=y
-# CONFIG_VT_HW_CONSOLE_BINDING is not set
-# CONFIG_SERIAL_NONSTANDARD is not set
-
-#
-# Serial drivers
-#
-# CONFIG_SERIAL_8250 is not set
-
-#
-# Non-8250 serial port support
-#
-CONFIG_SERIAL_CORE=y
-CONFIG_SERIAL_CORE_CONSOLE=y
-CONFIG_SERIAL_M32R_SIO=y
-CONFIG_SERIAL_M32R_SIO_CONSOLE=y
-CONFIG_SERIAL_M32R_PLDSIO=y
-CONFIG_UNIX98_PTYS=y
-CONFIG_LEGACY_PTYS=y
-CONFIG_LEGACY_PTY_COUNT=256
-# CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
-CONFIG_HW_RANDOM=y
-# CONFIG_RTC is not set
-CONFIG_DS1302=y
-# CONFIG_R3964 is not set
-# CONFIG_RAW_DRIVER is not set
-# CONFIG_TCG_TPM is not set
-# CONFIG_I2C is not set
-
-#
-# SPI support
-#
-# CONFIG_SPI is not set
-# CONFIG_SPI_MASTER is not set
-# CONFIG_W1 is not set
-# CONFIG_POWER_SUPPLY is not set
-CONFIG_HWMON=y
-# CONFIG_HWMON_VID is not set
-# CONFIG_SENSORS_ABITUGURU is not set
-# CONFIG_SENSORS_ABITUGURU3 is not set
-# CONFIG_SENSORS_F71805F is not set
-# CONFIG_SENSORS_IT87 is not set
-# CONFIG_SENSORS_PC87360 is not set
-# CONFIG_SENSORS_PC87427 is not set
-# CONFIG_SENSORS_SMSC47M1 is not set
-# CONFIG_SENSORS_SMSC47B397 is not set
-# CONFIG_SENSORS_VT1211 is not set
-# CONFIG_SENSORS_W83627HF is not set
-# CONFIG_SENSORS_W83627EHF is not set
-# CONFIG_HWMON_DEBUG_CHIP is not set
-
-#
-# Multifunction device drivers
-#
-# CONFIG_MFD_SM501 is not set
-
-#
-# Multimedia devices
-#
-CONFIG_VIDEO_DEV=m
-CONFIG_VIDEO_V4L1=y
-CONFIG_VIDEO_V4L1_COMPAT=y
-CONFIG_VIDEO_V4L2=y
-CONFIG_VIDEO_CAPTURE_DRIVERS=y
-# CONFIG_VIDEO_ADV_DEBUG is not set
-CONFIG_VIDEO_HELPER_CHIPS_AUTO=y
-# CONFIG_VIDEO_CPIA is not set
-CONFIG_VIDEO_M32R_AR=m
-CONFIG_VIDEO_M32R_AR_M64278=m
-CONFIG_RADIO_ADAPTERS=y
-# CONFIG_DVB_CORE is not set
-CONFIG_DAB=y
-
-#
-# Graphics support
-#
-# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
-
-#
-# Display device support
-#
-# CONFIG_DISPLAY_SUPPORT is not set
-# CONFIG_VGASTATE is not set
-CONFIG_VIDEO_OUTPUT_CONTROL=m
-CONFIG_FB=y
-CONFIG_FIRMWARE_EDID=y
-# CONFIG_FB_DDC is not set
-CONFIG_FB_CFB_FILLRECT=y
-CONFIG_FB_CFB_COPYAREA=y
-CONFIG_FB_CFB_IMAGEBLIT=y
-# CONFIG_FB_SYS_FILLRECT is not set
-# CONFIG_FB_SYS_COPYAREA is not set
-# CONFIG_FB_SYS_IMAGEBLIT is not set
-# CONFIG_FB_SYS_FOPS is not set
-CONFIG_FB_DEFERRED_IO=y
-# CONFIG_FB_SVGALIB is not set
-# CONFIG_FB_MACMODES is not set
-# CONFIG_FB_BACKLIGHT is not set
-# CONFIG_FB_MODE_HELPERS is not set
-# CONFIG_FB_TILEBLITTING is not set
-
-#
-# Frame buffer hardware drivers
-#
-CONFIG_FB_S1D13XXX=y
-# CONFIG_FB_VIRTUAL is not set
-
-#
-# Console display driver support
-#
-# CONFIG_VGA_CONSOLE is not set
-CONFIG_DUMMY_CONSOLE=y
-CONFIG_FRAMEBUFFER_CONSOLE=y
-# CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set
-# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
-# CONFIG_FONTS is not set
-CONFIG_FONT_8x8=y
-CONFIG_FONT_8x16=y
-CONFIG_LOGO=y
-CONFIG_LOGO_LINUX_MONO=y
-CONFIG_LOGO_LINUX_VGA16=y
-CONFIG_LOGO_LINUX_CLUT224=y
-CONFIG_LOGO_M32R_CLUT224=y
-
-#
-# Sound
-#
-# CONFIG_SOUND is not set
-CONFIG_HID_SUPPORT=y
-CONFIG_HID=y
-# CONFIG_HID_DEBUG is not set
-CONFIG_USB_SUPPORT=y
-# CONFIG_USB_ARCH_HAS_HCD is not set
-# CONFIG_USB_ARCH_HAS_OHCI is not set
-# CONFIG_USB_ARCH_HAS_EHCI is not set
-
-#
-# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
-#
-
-#
-# USB Gadget Support
-#
-# CONFIG_USB_GADGET is not set
-CONFIG_MMC=y
-CONFIG_MMC_DEBUG=y
-# CONFIG_MMC_UNSAFE_RESUME is not set
-
-#
-# MMC/SD Card Drivers
-#
-CONFIG_MMC_BLOCK=y
-CONFIG_MMC_BLOCK_BOUNCE=y
-
-#
-# MMC/SD Host Controller Drivers
-#
-# CONFIG_NEW_LEDS is not set
-
-#
-# Real Time Clock
-#
-# CONFIG_RTC_CLASS is not set
-
-#
-# Userspace I/O
-#
-# CONFIG_UIO is not set
-
-#
-# File systems
-#
-CONFIG_EXT2_FS=y
-# CONFIG_EXT2_FS_XATTR is not set
-# CONFIG_EXT2_FS_XIP is not set
-CONFIG_EXT3_FS=y
-CONFIG_EXT3_FS_XATTR=y
-# CONFIG_EXT3_FS_POSIX_ACL is not set
-# CONFIG_EXT3_FS_SECURITY is not set
-# CONFIG_EXT4DEV_FS is not set
-CONFIG_JBD=y
-CONFIG_JBD_DEBUG=y
-CONFIG_FS_MBCACHE=y
-CONFIG_REISERFS_FS=m
-# CONFIG_REISERFS_CHECK is not set
-# CONFIG_REISERFS_PROC_INFO is not set
-# CONFIG_REISERFS_FS_XATTR is not set
-# CONFIG_JFS_FS is not set
-# CONFIG_FS_POSIX_ACL is not set
-# CONFIG_XFS_FS is not set
-# CONFIG_GFS2_FS is not set
-# CONFIG_OCFS2_FS is not set
-# CONFIG_MINIX_FS is not set
-# CONFIG_ROMFS_FS is not set
-CONFIG_INOTIFY=y
-CONFIG_INOTIFY_USER=y
-# CONFIG_QUOTA is not set
-CONFIG_DNOTIFY=y
-# CONFIG_AUTOFS_FS is not set
-# CONFIG_AUTOFS4_FS is not set
-# CONFIG_FUSE_FS is not set
-
-#
-# CD-ROM/DVD Filesystems
-#
-CONFIG_ISO9660_FS=m
-CONFIG_JOLIET=y
-# CONFIG_ZISOFS is not set
-CONFIG_UDF_FS=m
-CONFIG_UDF_NLS=y
-
-#
-# DOS/FAT/NT Filesystems
-#
-CONFIG_FAT_FS=m
-CONFIG_MSDOS_FS=m
-CONFIG_VFAT_FS=m
-CONFIG_FAT_DEFAULT_CODEPAGE=437
-CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
-# CONFIG_NTFS_FS is not set
-
-#
-# Pseudo filesystems
-#
-CONFIG_PROC_FS=y
-CONFIG_PROC_KCORE=y
-CONFIG_PROC_SYSCTL=y
-CONFIG_SYSFS=y
-CONFIG_TMPFS=y
-# CONFIG_TMPFS_POSIX_ACL is not set
-# CONFIG_HUGETLB_PAGE is not set
-CONFIG_RAMFS=y
-# CONFIG_CONFIGFS_FS is not set
-
-#
-# Miscellaneous filesystems
-#
-# CONFIG_ADFS_FS is not set
-# CONFIG_AFFS_FS is not set
-# CONFIG_HFS_FS is not set
-# CONFIG_HFSPLUS_FS is not set
-# CONFIG_BEFS_FS is not set
-# CONFIG_BFS_FS is not set
-# CONFIG_EFS_FS is not set
-# CONFIG_JFFS2_FS is not set
-# CONFIG_CRAMFS is not set
-# CONFIG_VXFS_FS is not set
-# CONFIG_HPFS_FS is not set
-# CONFIG_QNX4FS_FS is not set
-# CONFIG_SYSV_FS is not set
-# CONFIG_UFS_FS is not set
-
-#
-# Network File Systems
-#
-CONFIG_NFS_FS=y
-CONFIG_NFS_V3=y
-# CONFIG_NFS_V3_ACL is not set
-# CONFIG_NFS_V4 is not set
-# CONFIG_NFS_DIRECTIO is not set
-# CONFIG_NFSD is not set
-CONFIG_ROOT_NFS=y
-CONFIG_LOCKD=y
-CONFIG_LOCKD_V4=y
-CONFIG_NFS_COMMON=y
-CONFIG_SUNRPC=y
-# CONFIG_SUNRPC_BIND34 is not set
-# CONFIG_RPCSEC_GSS_KRB5 is not set
-# CONFIG_RPCSEC_GSS_SPKM3 is not set
-# CONFIG_SMB_FS is not set
-# CONFIG_CIFS is not set
-# CONFIG_NCP_FS is not set
-# CONFIG_CODA_FS is not set
-# CONFIG_AFS_FS is not set
-
-#
-# Partition Types
-#
-# CONFIG_PARTITION_ADVANCED is not set
-CONFIG_MSDOS_PARTITION=y
-
-#
-# Native Language Support
-#
-CONFIG_NLS=y
-CONFIG_NLS_DEFAULT="iso8859-1"
-# CONFIG_NLS_CODEPAGE_437 is not set
-# CONFIG_NLS_CODEPAGE_737 is not set
-# CONFIG_NLS_CODEPAGE_775 is not set
-# CONFIG_NLS_CODEPAGE_850 is not set
-# CONFIG_NLS_CODEPAGE_852 is not set
-# CONFIG_NLS_CODEPAGE_855 is not set
-# CONFIG_NLS_CODEPAGE_857 is not set
-# CONFIG_NLS_CODEPAGE_860 is not set
-# CONFIG_NLS_CODEPAGE_861 is not set
-# CONFIG_NLS_CODEPAGE_862 is not set
-# CONFIG_NLS_CODEPAGE_863 is not set
-# CONFIG_NLS_CODEPAGE_864 is not set
-# CONFIG_NLS_CODEPAGE_865 is not set
-# CONFIG_NLS_CODEPAGE_866 is not set
-# CONFIG_NLS_CODEPAGE_869 is not set
-# CONFIG_NLS_CODEPAGE_936 is not set
-# CONFIG_NLS_CODEPAGE_950 is not set
-# CONFIG_NLS_CODEPAGE_932 is not set
-# CONFIG_NLS_CODEPAGE_949 is not set
-# CONFIG_NLS_CODEPAGE_874 is not set
-# CONFIG_NLS_ISO8859_8 is not set
-# CONFIG_NLS_CODEPAGE_1250 is not set
-# CONFIG_NLS_CODEPAGE_1251 is not set
-# CONFIG_NLS_ASCII is not set
-# CONFIG_NLS_ISO8859_1 is not set
-# CONFIG_NLS_ISO8859_2 is not set
-# CONFIG_NLS_ISO8859_3 is not set
-# CONFIG_NLS_ISO8859_4 is not set
-# CONFIG_NLS_ISO8859_5 is not set
-# CONFIG_NLS_ISO8859_6 is not set
-# CONFIG_NLS_ISO8859_7 is not set
-# CONFIG_NLS_ISO8859_9 is not set
-# CONFIG_NLS_ISO8859_13 is not set
-# CONFIG_NLS_ISO8859_14 is not set
-# CONFIG_NLS_ISO8859_15 is not set
-# CONFIG_NLS_KOI8_R is not set
-# CONFIG_NLS_KOI8_U is not set
-# CONFIG_NLS_UTF8 is not set
-
-#
-# Distributed Lock Manager
-#
-# CONFIG_DLM is not set
-
-#
-# Profiling support
-#
-CONFIG_PROFILING=y
-CONFIG_OPROFILE=y
-
-#
-# Kernel hacking
-#
-# CONFIG_PRINTK_TIME is not set
-CONFIG_ENABLE_MUST_CHECK=y
-# CONFIG_MAGIC_SYSRQ is not set
-# CONFIG_UNUSED_SYMBOLS is not set
-# CONFIG_DEBUG_FS is not set
-# CONFIG_HEADERS_CHECK is not set
-# CONFIG_DEBUG_KERNEL is not set
-# CONFIG_DEBUG_BUGVERBOSE is not set
-# CONFIG_FRAME_POINTER is not set
-
-#
-# Security options
-#
-# CONFIG_KEYS is not set
-# CONFIG_SECURITY is not set
-# CONFIG_CRYPTO is not set
-
-#
-# Library routines
-#
-CONFIG_BITREVERSE=y
-# CONFIG_CRC_CCITT is not set
-# CONFIG_CRC16 is not set
-# CONFIG_CRC_ITU_T is not set
-CONFIG_CRC32=y
-# CONFIG_CRC7 is not set
-# CONFIG_LIBCRC32C is not set
-CONFIG_HAS_IOMEM=y
diff --git a/arch/m32r/kernel/vmlinux.lds.S b/arch/m32r/kernel/vmlinux.lds.S
index 41b07854fcc6..15a6f36c06db 100644
--- a/arch/m32r/kernel/vmlinux.lds.S
+++ b/arch/m32r/kernel/vmlinux.lds.S
@@ -60,9 +60,6 @@ SECTIONS
   . = ALIGN(4096);
   __nosave_end = .;
 
-  . = ALIGN(4096);
-  .data.page_aligned : { *(.data.idt) }
-
   . = ALIGN(32);
   .data.cacheline_aligned : { *(.data.cacheline_aligned) }
 
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 0cfbe8c594a5..84e064ffee52 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -35,7 +35,7 @@ struct virtblk_req
         struct list_head list;
         struct request *req;
         struct virtio_blk_outhdr out_hdr;
-        struct virtio_blk_inhdr in_hdr;
+        u8 status;
 };
 
 static void blk_done(struct virtqueue *vq)
@@ -48,7 +48,7 @@ static void blk_done(struct virtqueue *vq)
         spin_lock_irqsave(&vblk->lock, flags);
         while ((vbr = vblk->vq->vq_ops->get_buf(vblk->vq, &len)) != NULL) {
                 int uptodate;
-                switch (vbr->in_hdr.status) {
+                switch (vbr->status) {
                 case VIRTIO_BLK_S_OK:
                         uptodate = 1;
                         break;
@@ -101,7 +101,7 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
         sg_init_table(vblk->sg, VIRTIO_MAX_SG);
         sg_set_buf(&vblk->sg[0], &vbr->out_hdr, sizeof(vbr->out_hdr));
         num = blk_rq_map_sg(q, vbr->req, vblk->sg+1);
-        sg_set_buf(&vblk->sg[num+1], &vbr->in_hdr, sizeof(vbr->in_hdr));
+        sg_set_buf(&vblk->sg[num+1], &vbr->status, sizeof(vbr->status));
 
         if (rq_data_dir(vbr->req) == WRITE) {
                 vbr->out_hdr.type |= VIRTIO_BLK_T_OUT;
@@ -157,10 +157,25 @@ static int virtblk_ioctl(struct inode *inode, struct file *filp,
 /* We provide getgeo only to please some old bootloader/partitioning tools */
 static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo)
 {
-        /* some standard values, similar to sd */
-        geo->heads = 1 << 6;
-        geo->sectors = 1 << 5;
-        geo->cylinders = get_capacity(bd->bd_disk) >> 11;
+        struct virtio_blk *vblk = bd->bd_disk->private_data;
+        struct virtio_blk_geometry vgeo;
+        int err;
+
+        /* see if the host passed in geometry config */
+        err = virtio_config_val(vblk->vdev, VIRTIO_BLK_F_GEOMETRY,
+                                offsetof(struct virtio_blk_config, geometry),
+                                &vgeo);
+
+        if (!err) {
+                geo->heads = vgeo.heads;
+                geo->sectors = vgeo.sectors;
+                geo->cylinders = vgeo.cylinders;
+        } else {
+                /* some standard values, similar to sd */
+                geo->heads = 1 << 6;
+                geo->sectors = 1 << 5;
+                geo->cylinders = get_capacity(bd->bd_disk) >> 11;
+        }
         return 0;
 }
 
@@ -242,12 +257,12 @@ static int virtblk_probe(struct virtio_device *vdev)
         index++;
 
         /* If barriers are supported, tell block layer that queue is ordered */
-        if (vdev->config->feature(vdev, VIRTIO_BLK_F_BARRIER))
+        if (virtio_has_feature(vdev, VIRTIO_BLK_F_BARRIER))
                 blk_queue_ordered(vblk->disk->queue, QUEUE_ORDERED_TAG, NULL);
 
         /* Host must always specify the capacity. */
-        __virtio_config_val(vdev, offsetof(struct virtio_blk_config, capacity),
-                            &cap);
+        vdev->config->get(vdev, offsetof(struct virtio_blk_config, capacity),
+                          &cap, sizeof(cap));
 
         /* If capacity is too big, truncate with warning. */
         if ((sector_t)cap != cap) {
@@ -289,7 +304,6 @@ out:
 static void virtblk_remove(struct virtio_device *vdev)
 {
         struct virtio_blk *vblk = vdev->priv;
-        int major = vblk->disk->major;
 
         /* Nothing should be pending. */
         BUG_ON(!list_empty(&vblk->reqs));
@@ -299,7 +313,6 @@ static void virtblk_remove(struct virtio_device *vdev)
 
         blk_cleanup_queue(vblk->disk->queue);
         put_disk(vblk->disk);
-        unregister_blkdev(major, "virtblk");
         mempool_destroy(vblk->pool);
         vdev->config->del_vq(vblk->vq);
         kfree(vblk);
@@ -310,7 +323,14 @@ static struct virtio_device_id id_table[] = {
         { 0 },
 };
 
+static unsigned int features[] = {
+        VIRTIO_BLK_F_BARRIER, VIRTIO_BLK_F_SEG_MAX, VIRTIO_BLK_F_SIZE_MAX,
+        VIRTIO_BLK_F_GEOMETRY,
+};
+
 static struct virtio_driver virtio_blk = {
+        .feature_table = features,
+        .feature_table_size = ARRAY_SIZE(features),
         .driver.name =  KBUILD_MODNAME,
         .driver.owner = THIS_MODULE,
         .id_table =     id_table,
diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 2bc9bf7e88e5..8080249957af 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -85,27 +85,34 @@ static unsigned desc_size(const struct lguest_device_desc *desc)
                 + desc->config_len;
 }
 
-/* This tests (and acknowleges) a feature bit. */
-static bool lg_feature(struct virtio_device *vdev, unsigned fbit)
+/* This gets the device's feature bits. */
+static u32 lg_get_features(struct virtio_device *vdev)
 {
+        unsigned int i;
+        u32 features = 0;
         struct lguest_device_desc *desc = to_lgdev(vdev)->desc;
-        u8 *features;
-
-        /* Obviously if they ask for a feature off the end of our feature
-         * bitmap, it's not set. */
-        if (fbit / 8 > desc->feature_len)
-                return false;
-
-        /* The feature bitmap comes after the virtqueues. */
-        features = lg_features(desc);
-        if (!(features[fbit / 8] & (1 << (fbit % 8))))
-                return false;
-
-        /* We set the matching bit in the other half of the bitmap to tell the
-         * Host we want to use this feature.  We don't use this yet, but we
-         * could in future. */
-        features[desc->feature_len + fbit / 8] |= (1 << (fbit % 8));
-        return true;
+        u8 *in_features = lg_features(desc);
+
+        /* We do this the slow but generic way. */
+        for (i = 0; i < min(desc->feature_len * 8, 32); i++)
+                if (in_features[i / 8] & (1 << (i % 8)))
+                        features |= (1 << i);
+
+        return features;
+}
+
+static void lg_set_features(struct virtio_device *vdev, u32 features)
+{
+        unsigned int i;
+        struct lguest_device_desc *desc = to_lgdev(vdev)->desc;
+        /* Second half of bitmap is features we accept. */
+        u8 *out_features = lg_features(desc) + desc->feature_len;
+
+        memset(out_features, 0, desc->feature_len);
+        for (i = 0; i < min(desc->feature_len * 8, 32); i++) {
+                if (features & (1 << i))
+                        out_features[i / 8] |= (1 << (i % 8));
+        }
 }
 
 /* Once they've found a field, getting a copy of it is easy. */
@@ -137,20 +144,26 @@ static u8 lg_get_status(struct virtio_device *vdev)
         return to_lgdev(vdev)->desc->status;
 }
 
+/* To notify on status updates, we (ab)use the NOTIFY hypercall, with the
+ * descriptor address of the device.  A zero status means "reset". */
+static void set_status(struct virtio_device *vdev, u8 status)
+{
+        unsigned long offset = (void *)to_lgdev(vdev)->desc - lguest_devices;
+
+        /* We set the status. */
+        to_lgdev(vdev)->desc->status = status;
+        hcall(LHCALL_NOTIFY, (max_pfn<<PAGE_SHIFT) + offset, 0, 0);
+}
+
 static void lg_set_status(struct virtio_device *vdev, u8 status)
 {
         BUG_ON(!status);
-        to_lgdev(vdev)->desc->status = status;
+        set_status(vdev, status);
 }
 
-/* To reset the device, we (ab)use the NOTIFY hypercall, with the descriptor
- * address of the device.  The Host will zero the status and all the
- * features. */
 static void lg_reset(struct virtio_device *vdev)
 {
-        unsigned long offset = (void *)to_lgdev(vdev)->desc - lguest_devices;
-
-        hcall(LHCALL_NOTIFY, (max_pfn<<PAGE_SHIFT) + offset, 0, 0);
+        set_status(vdev, 0);
 }
 
 /*
@@ -286,7 +299,8 @@ static void lg_del_vq(struct virtqueue *vq)
 
 /* The ops structure which hooks everything together. */
 static struct virtio_config_ops lguest_config_ops = {
-        .feature = lg_feature,
+        .get_features = lg_get_features,
+        .set_features = lg_set_features,
         .get = lg_get,
         .set = lg_set,
         .get_status = lg_get_status,
diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c
index 645e6e040bfb..e73a000473cc 100644
--- a/drivers/lguest/lguest_user.c
+++ b/drivers/lguest/lguest_user.c
@@ -102,7 +102,7 @@ static ssize_t read(struct file *file, char __user *user, size_t size,loff_t*o)
 static int lg_cpu_start(struct lg_cpu *cpu, unsigned id, unsigned long start_ip)
 {
         /* We have a limited number the number of CPUs in the lguest struct. */
-        if (id >= NR_CPUS)
+        if (id >= ARRAY_SIZE(cpu->lg->cpus))
                 return -EINVAL;
 
         /* Set up this CPU's id, and pointer back to the lguest struct. */
@@ -251,8 +251,6 @@ static ssize_t write(struct file *file, const char __user *in,
                 if (!lg || (cpu_id >= lg->nr_cpus))
                         return -EINVAL;
                 cpu = &lg->cpus[cpu_id];
-                if (!cpu)
-                        return -EINVAL;
 
                 /* Once the Guest is dead, you can only read() why it died. */
                 if (lg->dead)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 555b70c8b863..f926b5ab3d09 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -41,6 +41,9 @@ struct virtnet_info
         struct net_device *dev;
         struct napi_struct napi;
 
+        /* The skb we couldn't send because buffers were full. */
+        struct sk_buff *last_xmit_skb;
+
         /* Number of input buffers, and max we've ever had. */
         unsigned int num, max;
 
@@ -142,10 +145,10 @@ drop:
 static void try_fill_recv(struct virtnet_info *vi)
 {
         struct sk_buff *skb;
-        struct scatterlist sg[1+MAX_SKB_FRAGS];
+        struct scatterlist sg[2+MAX_SKB_FRAGS];
         int num, err;
 
-        sg_init_table(sg, 1+MAX_SKB_FRAGS);
+        sg_init_table(sg, 2+MAX_SKB_FRAGS);
         for (;;) {
                 skb = netdev_alloc_skb(vi->dev, MAX_PACKET_LEN);
                 if (unlikely(!skb))
@@ -221,23 +224,22 @@ static void free_old_xmit_skbs(struct virtnet_info *vi)
         while ((skb = vi->svq->vq_ops->get_buf(vi->svq, &len)) != NULL) {
                 pr_debug("Sent skb %p\n", skb);
                 __skb_unlink(skb, &vi->send);
-                vi->dev->stats.tx_bytes += len;
+                vi->dev->stats.tx_bytes += skb->len;
                 vi->dev->stats.tx_packets++;
                 kfree_skb(skb);
         }
 }
 
-static int start_xmit(struct sk_buff *skb, struct net_device *dev)
+static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
 {
-        struct virtnet_info *vi = netdev_priv(dev);
-        int num, err;
-        struct scatterlist sg[1+MAX_SKB_FRAGS];
+        int num;
+        struct scatterlist sg[2+MAX_SKB_FRAGS];
         struct virtio_net_hdr *hdr;
         const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest;
 
-        sg_init_table(sg, 1+MAX_SKB_FRAGS);
+        sg_init_table(sg, 2+MAX_SKB_FRAGS);
 
-        pr_debug("%s: xmit %p " MAC_FMT "\n", dev->name, skb,
+        pr_debug("%s: xmit %p " MAC_FMT "\n", vi->dev->name, skb,
                  dest[0], dest[1], dest[2],
                  dest[3], dest[4], dest[5]);
 
@@ -272,30 +274,51 @@ static int start_xmit(struct sk_buff *skb, struct net_device *dev)
 
         vnet_hdr_to_sg(sg, skb);
         num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1;
-        __skb_queue_head(&vi->send, skb);
+
+        return vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb);
+}
+
+static int start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+        struct virtnet_info *vi = netdev_priv(dev);
 
 again:
         /* Free up any pending old buffers before queueing new ones. */
         free_old_xmit_skbs(vi);
-        err = vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb);
-        if (err) {
-                pr_debug("%s: virtio not prepared to send\n", dev->name);
-                netif_stop_queue(dev);
-
-                /* Activate callback for using skbs: if this returns false it
-                 * means some were used in the meantime. */
-                if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
-                        vi->svq->vq_ops->disable_cb(vi->svq);
-                        netif_start_queue(dev);
-                        goto again;
+
+        /* If we has a buffer left over from last time, send it now. */
+        if (vi->last_xmit_skb) {
+                if (xmit_skb(vi, vi->last_xmit_skb) != 0) {
+                        /* Drop this skb: we only queue one. */
+                        vi->dev->stats.tx_dropped++;
+                        kfree_skb(skb);
+                        goto stop_queue;
                 }
-                __skb_unlink(skb, &vi->send);
+                vi->last_xmit_skb = NULL;
+        }
 
-                return NETDEV_TX_BUSY;
+        /* Put new one in send queue and do transmit */
+        __skb_queue_head(&vi->send, skb);
+        if (xmit_skb(vi, skb) != 0) {
+                vi->last_xmit_skb = skb;
+                goto stop_queue;
         }
+done:
         vi->svq->vq_ops->kick(vi->svq);
-
-        return 0;
+        return NETDEV_TX_OK;
+
+stop_queue:
+        pr_debug("%s: virtio not prepared to send\n", dev->name);
+        netif_stop_queue(dev);
+
+        /* Activate callback for using skbs: if this returns false it
+         * means some were used in the meantime. */
+        if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
+                vi->svq->vq_ops->disable_cb(vi->svq);
+                netif_start_queue(dev);
+                goto again;
+        }
+        goto done;
 }
 
 #ifdef CONFIG_NET_POLL_CONTROLLER
@@ -355,17 +378,26 @@ static int virtnet_probe(struct virtio_device *vdev)
         SET_NETDEV_DEV(dev, &vdev->dev);
 
         /* Do we support "hardware" checksums? */
-        if (csum && vdev->config->feature(vdev, VIRTIO_NET_F_CSUM)) {
+        if (csum && virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) {
                 /* This opens up the world of extra features. */
                 dev->features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
-                if (gso && vdev->config->feature(vdev, VIRTIO_NET_F_GSO)) {
+                if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) {
                         dev->features |= NETIF_F_TSO | NETIF_F_UFO
                                 | NETIF_F_TSO_ECN | NETIF_F_TSO6;
                 }
+                /* Individual feature bits: what can host handle? */
+                if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4))
+                        dev->features |= NETIF_F_TSO;
+                if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6))
+                        dev->features |= NETIF_F_TSO6;
+                if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN))
+                        dev->features |= NETIF_F_TSO_ECN;
+                if (gso && virtio_has_feature(vdev, VIRTIO_NET_F_HOST_UFO))
+                        dev->features |= NETIF_F_UFO;
         }
 
         /* Configuration may specify what MAC to use.  Otherwise random. */
-        if (vdev->config->feature(vdev, VIRTIO_NET_F_MAC)) {
+        if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) {
                 vdev->config->get(vdev,
                                   offsetof(struct virtio_net_config, mac),
                                   dev->dev_addr, dev->addr_len);
@@ -454,7 +486,15 @@ static struct virtio_device_id id_table[] = {
         { 0 },
 };
 
+static unsigned int features[] = {
+        VIRTIO_NET_F_CSUM, VIRTIO_NET_F_GSO, VIRTIO_NET_F_MAC,
+        VIRTIO_NET_F_HOST_TSO4, VIRTIO_NET_F_HOST_UFO, VIRTIO_NET_F_HOST_TSO6,
+        VIRTIO_NET_F_HOST_ECN,
+};
+
 static struct virtio_driver virtio_net = {
+        .feature_table = features,
+        .feature_table_size = ARRAY_SIZE(features),
         .driver.name =  KBUILD_MODNAME,
         .driver.owner = THIS_MODULE,
         .id_table =     id_table,
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index b535483bc556..13866789b356 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -80,19 +80,51 @@ static void add_status(struct virtio_device *dev, unsigned status)
         dev->config->set_status(dev, dev->config->get_status(dev) | status);
 }
 
+void virtio_check_driver_offered_feature(const struct virtio_device *vdev,
+                                         unsigned int fbit)
+{
+        unsigned int i;
+        struct virtio_driver *drv = container_of(vdev->dev.driver,
+                                                 struct virtio_driver, driver);
+
+        for (i = 0; i < drv->feature_table_size; i++)
+                if (drv->feature_table[i] == fbit)
+                        return;
+        BUG();
+}
+EXPORT_SYMBOL_GPL(virtio_check_driver_offered_feature);
+
 static int virtio_dev_probe(struct device *_d)
 {
-        int err;
+        int err, i;
         struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
         struct virtio_driver *drv = container_of(dev->dev.driver,
                                                  struct virtio_driver, driver);
+        u32 device_features;
 
+        /* We have a driver! */
         add_status(dev, VIRTIO_CONFIG_S_DRIVER);
+
+        /* Figure out what features the device supports. */
+        device_features = dev->config->get_features(dev);
+
+        /* Features supported by both device and driver into dev->features. */
+        memset(dev->features, 0, sizeof(dev->features));
+        for (i = 0; i < drv->feature_table_size; i++) {
+                unsigned int f = drv->feature_table[i];
+                BUG_ON(f >= 32);
+                if (device_features & (1 << f))
+                        set_bit(f, dev->features);
+        }
+
         err = drv->probe(dev);
         if (err)
                 add_status(dev, VIRTIO_CONFIG_S_FAILED);
-        else
+        else {
                 add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK);
+                /* They should never have set feature bits beyond 32 */
+                dev->config->set_features(dev, dev->features[0]);
+        }
         return err;
 }
 
@@ -114,6 +146,8 @@ static int virtio_dev_remove(struct device *_d)
 
 int register_virtio_driver(struct virtio_driver *driver)
 {
+        /* Catch this early. */
+        BUG_ON(driver->feature_table_size && !driver->feature_table);
         driver->driver.bus = &virtio_bus;
         driver->driver.probe = virtio_dev_probe;
         driver->driver.remove = virtio_dev_remove;
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 0b3efc31ee6d..bfef604160d1 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -155,9 +155,9 @@ static void virtballoon_changed(struct virtio_device *vdev)
 static inline s64 towards_target(struct virtio_balloon *vb)
 {
         u32 v;
-        __virtio_config_val(vb->vdev,
-                            offsetof(struct virtio_balloon_config, num_pages),
-                            &v);
+        vb->vdev->config->get(vb->vdev,
+                              offsetof(struct virtio_balloon_config, num_pages),
+                              &v, sizeof(v));
         return v - vb->num_pages;
 }
 
@@ -227,7 +227,7 @@ static int virtballoon_probe(struct virtio_device *vdev)
         }
 
         vb->tell_host_first
-                = vdev->config->feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
+                = virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
 
         return 0;
 
@@ -259,7 +259,11 @@ static void virtballoon_remove(struct virtio_device *vdev)
         kfree(vb);
 }
 
+static unsigned int features[] = { VIRTIO_BALLOON_F_MUST_TELL_HOST };
+
 static struct virtio_driver virtio_balloon = {
+        .feature_table = features,
+        .feature_table_size = ARRAY_SIZE(features),
         .driver.name =  KBUILD_MODNAME,
         .driver.owner = THIS_MODULE,
         .id_table =     id_table,
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index c0df924766a7..27e9fc9117cd 100644
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -87,23 +87,22 @@ static struct virtio_pci_device *to_vp_device(struct virtio_device *vdev)
         return container_of(vdev, struct virtio_pci_device, vdev);
 }
 
-/* virtio config->feature() implementation */
-static bool vp_feature(struct virtio_device *vdev, unsigned bit)
+/* virtio config->get_features() implementation */
+static u32 vp_get_features(struct virtio_device *vdev)
+{
+        struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+
+        /* When someone needs more than 32 feature bits, we'll need to
+         * steal a bit to indicate that the rest are somewhere else. */
+        return ioread32(vp_dev->ioaddr + VIRTIO_PCI_HOST_FEATURES);
+}
+
+/* virtio config->set_features() implementation */
+static void vp_set_features(struct virtio_device *vdev, u32 features)
 {
         struct virtio_pci_device *vp_dev = to_vp_device(vdev);
-        u32 mask;
-
-        /* Since this function is supposed to have the side effect of
-         * enabling a queried feature, we simulate that by doing a read
-         * from the host feature bitmask and then writing to the guest
-         * feature bitmask */
-        mask = ioread32(vp_dev->ioaddr + VIRTIO_PCI_HOST_FEATURES);
-        if (mask & (1 << bit)) {
-                mask |= (1 << bit);
-                iowrite32(mask, vp_dev->ioaddr + VIRTIO_PCI_GUEST_FEATURES);
-        }
 
-        return !!(mask & (1 << bit));
+        iowrite32(features, vp_dev->ioaddr + VIRTIO_PCI_GUEST_FEATURES);
 }
 
 /* virtio config->get() implementation */
@@ -145,14 +144,14 @@ static void vp_set_status(struct virtio_device *vdev, u8 status)
         struct virtio_pci_device *vp_dev = to_vp_device(vdev);
         /* We should never be setting status to 0. */
         BUG_ON(status == 0);
-        return iowrite8(status, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
+        iowrite8(status, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
 }
 
 static void vp_reset(struct virtio_device *vdev)
 {
         struct virtio_pci_device *vp_dev = to_vp_device(vdev);
         /* 0 status means a reset. */
-        return iowrite8(0, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
+        iowrite8(0, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
 }
 
 /* the notify function used when creating a virt queue */
@@ -293,7 +292,6 @@ static void vp_del_vq(struct virtqueue *vq)
 }
 
 static struct virtio_config_ops virtio_pci_config_ops = {
-        .feature        = vp_feature,
         .get            = vp_get,
         .set            = vp_set,
         .get_status     = vp_get_status,
@@ -301,6 +299,8 @@ static struct virtio_config_ops virtio_pci_config_ops = {
         .reset          = vp_reset,
         .find_vq        = vp_find_vq,
         .del_vq         = vp_del_vq,
+        .get_features   = vp_get_features,
+        .set_features   = vp_set_features,
 };
 
 /* the PCI probing function */
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index c2fa5c630813..937a49d6772c 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -184,6 +184,11 @@ static void *vring_get_buf(struct virtqueue *_vq, unsigned int *len)
 
         START_USE(vq);
 
+        if (unlikely(vq->broken)) {
+                END_USE(vq);
+                return NULL;
+        }
+
         if (!more_used(vq)) {
                 pr_debug("No more buffers in queue\n");
                 END_USE(vq);
diff --git a/include/asm-ia64/cpu.h b/include/asm-ia64/cpu.h
index e87fa3210a2b..fcca30b9f110 100644
--- a/include/asm-ia64/cpu.h
+++ b/include/asm-ia64/cpu.h
@@ -14,8 +14,8 @@ DECLARE_PER_CPU(struct ia64_cpu, cpu_devices);
 
 DECLARE_PER_CPU(int, cpu_state);
 
-extern int arch_register_cpu(int num);
 #ifdef CONFIG_HOTPLUG_CPU
+extern int arch_register_cpu(int num);
 extern void arch_unregister_cpu(int);
 #endif
 
diff --git a/include/asm-ia64/thread_info.h b/include/asm-ia64/thread_info.h
index f30e05583869..2422ac61658a 100644
--- a/include/asm-ia64/thread_info.h
+++ b/include/asm-ia64/thread_info.h
@@ -108,13 +108,11 @@ extern void tsk_clear_notify_resume(struct task_struct *tsk);
 #define TIF_DB_DISABLED         19      /* debug trap disabled for fsyscall */
 #define TIF_FREEZE              20      /* is freezing for suspend */
 #define TIF_RESTORE_RSE         21      /* user RBS is newer than kernel RBS */
-#define TIF_RESTORE_SIGMASK     22      /* restore signal mask in do_signal() */
 
 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
 #define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
-#define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)
 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
@@ -131,7 +129,18 @@ extern void tsk_clear_notify_resume(struct task_struct *tsk);
 #define TIF_WORK_MASK           (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
 
 #define TS_POLLING              1       /* true if in idle loop and not sleeping */
+#define TS_RESTORE_SIGMASK      2       /* restore signal mask in do_signal() */
 
 #define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
 
+#ifndef __ASSEMBLY__
+#define HAVE_SET_RESTORE_SIGMASK        1
+static inline void set_restore_sigmask(void)
+{
+        struct thread_info *ti = current_thread_info();
+        ti->status |= TS_RESTORE_SIGMASK;
+        set_bit(TIF_SIGPENDING, &ti->flags);
+}
+#endif  /* !__ASSEMBLY__ */
+
 #endif /* _ASM_IA64_THREAD_INFO_H */
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 78fade0a1e35..b7d81b2a9041 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -346,6 +346,11 @@ unifdef-y += videodev.h
 unifdef-y += virtio_config.h
 unifdef-y += virtio_blk.h
 unifdef-y += virtio_net.h
+unifdef-y += virtio_9p.h
+unifdef-y += virtio_balloon.h
+unifdef-y += virtio_console.h
+unifdef-y += virtio_pci.h
+unifdef-y += virtio_ring.h
 unifdef-y += vt.h
 unifdef-y += wait.h
 unifdef-y += wanrouter.h
diff --git a/include/linux/device.h b/include/linux/device.h
index 832fb0eb2933..8c23e3dfe3ac 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -380,6 +380,12 @@ struct device {
 /* Get the wakeup routines, which depend on struct device */
 #include <linux/pm_wakeup.h>
 
+static inline const char *dev_name(struct device *dev)
+{
+        /* will be changed into kobject_name(&dev->kobj) in the near future */
+        return dev->bus_id;
+}
+
 #ifdef CONFIG_NUMA
 static inline int dev_to_node(struct device *dev)
 {
@@ -478,7 +484,7 @@ extern void sysdev_shutdown(void);
 extern const char *dev_driver_string(struct device *dev);
 #define dev_printk(level, dev, format, arg...)  \
         printk(level "%s %s: " format , dev_driver_string(dev) , \
-               (dev)->bus_id , ## arg)
+               dev_name(dev) , ## arg)
 
 #define dev_emerg(dev, format, arg...)          \
         dev_printk(KERN_EMERG , dev , format , ## arg)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 1883a85625dd..552e0ec269c9 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -61,6 +61,7 @@ typedef	void (*irq_flow_handler_t)(unsigned int irq,
 #define IRQ_WAKEUP              0x00100000      /* IRQ triggers system wakeup */
 #define IRQ_MOVE_PENDING        0x00200000      /* need to re-target IRQ destination */
 #define IRQ_NO_BALANCING        0x00400000      /* IRQ is excluded from balancing */
+#define IRQ_SPURIOUS_DISABLED   0x00800000      /* IRQ was disabled by the spurious trap */
 
 #ifdef CONFIG_IRQ_PER_CPU
 # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index e7d10845b3c1..06005fa9e982 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -76,6 +76,7 @@ struct virtqueue_ops {
  * @dev: underlying device.
  * @id: the device type identification (used to match it with a driver).
  * @config: the configuration ops for this device.
+ * @features: the features supported by both driver and device.
  * @priv: private pointer for the driver's use.
  */
 struct virtio_device
@@ -84,6 +85,8 @@ struct virtio_device
         struct device dev;
         struct virtio_device_id id;
         struct virtio_config_ops *config;
+        /* Note that this is a Linux set_bit-style bitmap. */
+        unsigned long features[1];
         void *priv;
 };
 
@@ -94,6 +97,8 @@ void unregister_virtio_device(struct virtio_device *dev);
  * virtio_driver - operations for a virtio I/O driver
  * @driver: underlying device driver (populate name and owner).
  * @id_table: the ids serviced by this driver.
+ * @feature_table: an array of feature numbers supported by this device.
+ * @feature_table_size: number of entries in the feature table array.
  * @probe: the function to call when a device is found.  Returns a token for
  *    remove, or PTR_ERR().
  * @remove: the function when a device is removed.
@@ -103,6 +108,8 @@ void unregister_virtio_device(struct virtio_device *dev);
 struct virtio_driver {
         struct device_driver driver;
         const struct virtio_device_id *id_table;
+        const unsigned int *feature_table;
+        unsigned int feature_table_size;
         int (*probe)(struct virtio_device *dev);
         void (*remove)(struct virtio_device *dev);
         void (*config_changed)(struct virtio_device *dev);
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
index bca0b10d7947..d4695a3356d0 100644
--- a/include/linux/virtio_blk.h
+++ b/include/linux/virtio_blk.h
@@ -9,6 +9,7 @@
 #define VIRTIO_BLK_F_BARRIER    0       /* Does host support barriers? */
 #define VIRTIO_BLK_F_SIZE_MAX   1       /* Indicates maximum segment size */
 #define VIRTIO_BLK_F_SEG_MAX    2       /* Indicates maximum # of segments */
+#define VIRTIO_BLK_F_GEOMETRY   4       /* Legacy geometry available  */
 
 struct virtio_blk_config
 {
@@ -18,6 +19,12 @@ struct virtio_blk_config
         __le32 size_max;
         /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
         __le32 seg_max;
+        /* geometry the device (if VIRTIO_BLK_F_GEOMETRY) */
+        struct virtio_blk_geometry {
+                __le16 cylinders;
+                __u8 heads;
+                __u8 sectors;
+        } geometry;
 } __attribute__((packed));
 
 /* These two define direction. */
@@ -41,13 +48,8 @@ struct virtio_blk_outhdr
         __u64 sector;
 };
 
+/* And this is the final byte of the write scatter-gather list. */
 #define VIRTIO_BLK_S_OK         0
 #define VIRTIO_BLK_S_IOERR      1
 #define VIRTIO_BLK_S_UNSUPP     2
-
-/* This is the first element of the write scatter-gather list */
-struct virtio_blk_inhdr
-{
-        unsigned char status;
-};
 #endif /* _LINUX_VIRTIO_BLK_H */
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index d581b2914b34..50db245c81ad 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -16,27 +16,20 @@
 #define VIRTIO_CONFIG_S_FAILED          0x80
 
 #ifdef __KERNEL__
-struct virtio_device;
+#include <linux/virtio.h>
 
 /**
  * virtio_config_ops - operations for configuring a virtio device
- * @feature: search for a feature in this config
- *      vdev: the virtio_device
- *      bit: the feature bit
- *      Returns true if the feature is supported.  Acknowledges the feature
- *      so the host can see it.
  * @get: read the value of a configuration field
  *      vdev: the virtio_device
  *      offset: the offset of the configuration field
  *      buf: the buffer to write the field value into.
  *      len: the length of the buffer
- *      Note that contents are conventionally little-endian.
  * @set: write the value of a configuration field
  *      vdev: the virtio_device
  *      offset: the offset of the configuration field
  *      buf: the buffer to read the field value from.
  *      len: the length of the buffer
- *      Note that contents are conventionally little-endian.
  * @get_status: read the status byte
  *      vdev: the virtio_device
  *      Returns the status byte
@@ -52,10 +45,15 @@ struct virtio_device;
  *      callback: the virqtueue callback
  *      Returns the new virtqueue or ERR_PTR() (eg. -ENOENT).
  * @del_vq: free a virtqueue found by find_vq().
+ * @get_features: get the array of feature bits for this device.
+ *      vdev: the virtio_device
+ *      Returns the first 32 feature bits (all we currently need).
+ * @set_features: confirm what device features we'll be using.
+ *      vdev: the virtio_device
+ *      feature: the first 32 feature bits
  */
 struct virtio_config_ops
 {
-        bool (*feature)(struct virtio_device *vdev, unsigned bit);
         void (*get)(struct virtio_device *vdev, unsigned offset,
                     void *buf, unsigned len);
         void (*set)(struct virtio_device *vdev, unsigned offset,
@@ -67,43 +65,52 @@ struct virtio_config_ops
                                      unsigned index,
                                      void (*callback)(struct virtqueue *));
         void (*del_vq)(struct virtqueue *vq);
+        u32 (*get_features)(struct virtio_device *vdev);
+        void (*set_features)(struct virtio_device *vdev, u32 features);
 };
 
+/* If driver didn't advertise the feature, it will never appear. */
+void virtio_check_driver_offered_feature(const struct virtio_device *vdev,
+                                         unsigned int fbit);
+
 /**
- * virtio_config_val - look for a feature and get a single virtio config.
- * @vdev: the virtio device
+ * virtio_has_feature - helper to determine if this device has this feature.
+ * @vdev: the device
  * @fbit: the feature bit
- * @offset: the type to search for.
- * @val: a pointer to the value to fill in.
- *
- * The return value is -ENOENT if the feature doesn't exist.  Otherwise
- * the value is endian-corrected and returned in v. */
-#define virtio_config_val(vdev, fbit, offset, v) ({                     \
-        int _err;                                                       \
-        if ((vdev)->config->feature((vdev), (fbit))) {                  \
-                __virtio_config_val((vdev), (offset), (v));             \
-                _err = 0;                                               \
-        } else                                                          \
-                _err = -ENOENT;                                         \
-        _err;                                                           \
-})
+ */
+static inline bool virtio_has_feature(const struct virtio_device *vdev,
+                                      unsigned int fbit)
+{
+        /* Did you forget to fix assumptions on max features? */
+        if (__builtin_constant_p(fbit))
+                BUILD_BUG_ON(fbit >= 32);
+
+        virtio_check_driver_offered_feature(vdev, fbit);
+        return test_bit(fbit, vdev->features);
+}
 
 /**
- * __virtio_config_val - get a single virtio config without feature check.
+ * virtio_config_val - look for a feature and get a virtio config entry.
  * @vdev: the virtio device
+ * @fbit: the feature bit
  * @offset: the type to search for.
  * @val: a pointer to the value to fill in.
  *
- * The value is endian-corrected and returned in v. */
-#define __virtio_config_val(vdev, offset, v) do {                       \
-        BUILD_BUG_ON(sizeof(*(v)) != 1 && sizeof(*(v)) != 2             \
-                     && sizeof(*(v)) != 4 && sizeof(*(v)) != 8);        \
-        (vdev)->config->get((vdev), (offset), (v), sizeof(*(v)));       \
-        switch (sizeof(*(v))) {                                         \
-        case 2: le16_to_cpus((__u16 *) v); break;                       \
-        case 4: le32_to_cpus((__u32 *) v); break;                       \
-        case 8: le64_to_cpus((__u64 *) v); break;                       \
-        }                                                               \
-} while(0)
+ * The return value is -ENOENT if the feature doesn't exist.  Otherwise
+ * the config value is copied into whatever is pointed to by v. */
+#define virtio_config_val(vdev, fbit, offset, v) \
+        virtio_config_buf((vdev), (fbit), (offset), (v), sizeof(v))
+
+static inline int virtio_config_buf(struct virtio_device *vdev,
+                                    unsigned int fbit,
+                                    unsigned int offset,
+                                    void *buf, unsigned len)
+{
+        if (!virtio_has_feature(vdev, fbit))
+                return -ENOENT;
+
+        vdev->config->get(vdev, offset, buf, len);
+        return 0;
+}
 #endif /* __KERNEL__ */
 #endif /* _LINUX_VIRTIO_CONFIG_H */
diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index 1ea3351df609..9405aa6cdf26 100644
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -6,9 +6,18 @@
 #define VIRTIO_ID_NET   1
 
 /* The feature bitmap for virtio net */
-#define VIRTIO_NET_F_CSUM       0       /* Can handle pkts w/ partial csum */
+#define VIRTIO_NET_F_CSUM       0       /* Host handles pkts w/ partial csum */
+#define VIRTIO_NET_F_GUEST_CSUM 1       /* Guest handles pkts w/ partial csum */
 #define VIRTIO_NET_F_MAC        5       /* Host has given MAC address. */
-#define VIRTIO_NET_F_GSO        6       /* Can handle pkts w/ any GSO type */
+#define VIRTIO_NET_F_GSO        6       /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_F_GUEST_TSO4 7       /* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_F_GUEST_TSO6 8       /* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_F_GUEST_ECN  9       /* Guest can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_GUEST_UFO  10      /* Guest can handle UFO in. */
+#define VIRTIO_NET_F_HOST_TSO4  11      /* Host can handle TSOv4 in. */
+#define VIRTIO_NET_F_HOST_TSO6  12      /* Host can handle TSOv6 in. */
+#define VIRTIO_NET_F_HOST_ECN   13      /* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_HOST_UFO   14      /* Host can handle UFO in. */
 
 struct virtio_net_config
 {
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 46e4ad1723f0..46d6611a33bb 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -150,6 +150,26 @@ void disable_irq(unsigned int irq)
 }
 EXPORT_SYMBOL(disable_irq);
 
+static void __enable_irq(struct irq_desc *desc, unsigned int irq)
+{
+        switch (desc->depth) {
+        case 0:
+                printk(KERN_WARNING "Unbalanced enable for IRQ %d\n", irq);
+                WARN_ON(1);
+                break;
+        case 1: {
+                unsigned int status = desc->status & ~IRQ_DISABLED;
+
+                /* Prevent probing on this irq: */
+                desc->status = status | IRQ_NOPROBE;
+                check_irq_resend(desc, irq);
+                /* fall-through */
+        }
+        default:
+                desc->depth--;
+        }
+}
+
 /**
  *      enable_irq - enable handling of an irq
  *      @irq: Interrupt to enable
@@ -169,22 +189,7 @@ void enable_irq(unsigned int irq)
                 return;
 
         spin_lock_irqsave(&desc->lock, flags);
-        switch (desc->depth) {
-        case 0:
-                printk(KERN_WARNING "Unbalanced enable for IRQ %d\n", irq);
-                WARN_ON(1);
-                break;
-        case 1: {
-                unsigned int status = desc->status & ~IRQ_DISABLED;
-
-                /* Prevent probing on this irq: */
-                desc->status = status | IRQ_NOPROBE;
-                check_irq_resend(desc, irq);
-                /* fall-through */
-        }
-        default:
-                desc->depth--;
-        }
+        __enable_irq(desc, irq);
         spin_unlock_irqrestore(&desc->lock, flags);
 }
 EXPORT_SYMBOL(enable_irq);
@@ -365,7 +370,7 @@ int setup_irq(unsigned int irq, struct irqaction *new)
                         compat_irq_chip_set_default_handler(desc);
 
                 desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING |
-                                  IRQ_INPROGRESS);
+                                  IRQ_INPROGRESS | IRQ_SPURIOUS_DISABLED);
 
                 if (!(desc->status & IRQ_NOAUTOEN)) {
                         desc->depth = 0;
@@ -381,6 +386,16 @@ int setup_irq(unsigned int irq, struct irqaction *new)
         /* Reset broken irq detection when installing new handler */
         desc->irq_count = 0;
         desc->irqs_unhandled = 0;
+
+        /*
+         * Check whether we disabled the irq via the spurious handler
+         * before. Reenable it and give it another chance.
+         */
+        if (shared && (desc->status & IRQ_SPURIOUS_DISABLED)) {
+                desc->status &= ~IRQ_SPURIOUS_DISABLED;
+                __enable_irq(desc, irq);
+        }
+
         spin_unlock_irqrestore(&desc->lock, flags);
 
         new->irq = irq;
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index 088dabbf2d6a..c66d3f10e853 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -209,8 +209,8 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
                  * Now kill the IRQ
                  */
                 printk(KERN_EMERG "Disabling IRQ #%d\n", irq);
-                desc->status |= IRQ_DISABLED;
-                desc->depth = 1;
+                desc->status |= IRQ_DISABLED | IRQ_SPURIOUS_DISABLED;
+                desc->depth++;
                 desc->chip->disable(irq);
         }
         desc->irqs_unhandled = 0;