17 files changed, 235 insertions, 134 deletions

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 5207f9e4b443..cbb6f0814ce2 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -322,10 +322,6 @@ static int acpi_processor_get_performance_info(struct acpi_processor *pr)
         if (result)
                 return result;
 
-        result = acpi_processor_get_platform_limit(pr);
-        if (result)
-                return result;
-
         return 0;
 }
 
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index 5ab5e393b882..c6281ccd4fe7 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -122,8 +122,6 @@ struct efivar_entry {
         struct kobject kobj;
 };
 
-#define get_efivar_entry(n) list_entry(n, struct efivar_entry, list)
-
 struct efivar_attribute {
         struct attribute attr;
         ssize_t (*show) (struct efivar_entry *entry, char *buf);
@@ -386,9 +384,6 @@ static struct sysfs_ops efivar_attr_ops = {
 static void efivar_release(struct kobject *kobj)
 {
         struct efivar_entry *var = container_of(kobj, struct efivar_entry, kobj);
-        spin_lock(&efivars_lock);
-        list_del(&var->list);
-        spin_unlock(&efivars_lock);
         kfree(var);
 }
 
@@ -430,9 +425,8 @@ static ssize_t
 efivar_create(struct subsystem *sub, const char *buf, size_t count)
 {
         struct efi_variable *new_var = (struct efi_variable *)buf;
-        struct efivar_entry *search_efivar = NULL;
+        struct efivar_entry *search_efivar, *n;
         unsigned long strsize1, strsize2;
-        struct list_head *pos, *n;
         efi_status_t status = EFI_NOT_FOUND;
         int found = 0;
 
@@ -444,8 +438,7 @@ efivar_create(struct subsystem *sub, const char *buf, size_t count)
         /*
          * Does this variable already exist?
          */
-        list_for_each_safe(pos, n, &efivar_list) {
-                search_efivar = get_efivar_entry(pos);
+        list_for_each_entry_safe(search_efivar, n, &efivar_list, list) {
                 strsize1 = utf8_strsize(search_efivar->var.VariableName, 1024);
                 strsize2 = utf8_strsize(new_var->VariableName, 1024);
                 if (strsize1 == strsize2 &&
@@ -490,9 +483,8 @@ static ssize_t
 efivar_delete(struct subsystem *sub, const char *buf, size_t count)
 {
         struct efi_variable *del_var = (struct efi_variable *)buf;
-        struct efivar_entry *search_efivar = NULL;
+        struct efivar_entry *search_efivar, *n;
         unsigned long strsize1, strsize2;
-        struct list_head *pos, *n;
         efi_status_t status = EFI_NOT_FOUND;
         int found = 0;
 
@@ -504,8 +496,7 @@ efivar_delete(struct subsystem *sub, const char *buf, size_t count)
         /*
          * Does this variable already exist?
          */
-        list_for_each_safe(pos, n, &efivar_list) {
-                search_efivar = get_efivar_entry(pos);
+        list_for_each_entry_safe(search_efivar, n, &efivar_list, list) {
                 strsize1 = utf8_strsize(search_efivar->var.VariableName, 1024);
                 strsize2 = utf8_strsize(del_var->VariableName, 1024);
                 if (strsize1 == strsize2 &&
@@ -537,9 +528,9 @@ efivar_delete(struct subsystem *sub, const char *buf, size_t count)
                 spin_unlock(&efivars_lock);
                 return -EIO;
         }
+        list_del(&search_efivar->list);
         /* We need to release this lock before unregistering. */
         spin_unlock(&efivars_lock);
-
         efivar_unregister(search_efivar);
 
         /* It's dead Jim.... */
@@ -768,10 +759,14 @@ out_free:
 static void __exit
 efivars_exit(void)
 {
-        struct list_head *pos, *n;
+        struct efivar_entry *entry, *n;
 
-        list_for_each_safe(pos, n, &efivar_list)
-                efivar_unregister(get_efivar_entry(pos));
+        list_for_each_entry_safe(entry, n, &efivar_list, list) {
+                spin_lock(&efivars_lock);
+                list_del(&entry->list);
+                spin_unlock(&efivars_lock);
+                efivar_unregister(entry);
+        }
 
         subsystem_unregister(&vars_subsys);
         firmware_unregister(&efi_subsys);
diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c
index 95eff3b2917a..4f75cce6fdff 100644
--- a/drivers/isdn/gigaset/common.c
+++ b/drivers/isdn/gigaset/common.c
@@ -356,16 +356,17 @@ static struct cardstate *alloc_cs(struct gigaset_driver *drv)
 {
         unsigned long flags;
         unsigned i;
-        static struct cardstate *ret = NULL;
+        struct cardstate *ret = NULL;
 
         spin_lock_irqsave(&drv->lock, flags);
         for (i = 0; i < drv->minors; ++i) {
                 if (!(drv->flags[i] & VALID_MINOR)) {
-                        drv->flags[i] = VALID_MINOR;
-                        ret = drv->cs + i;
-                }
-                if (ret)
+                        if (try_module_get(drv->owner)) {
+                                drv->flags[i] = VALID_MINOR;
+                                ret = drv->cs + i;
+                        }
                         break;
+                }
         }
         spin_unlock_irqrestore(&drv->lock, flags);
         return ret;
@@ -376,6 +377,8 @@ static void free_cs(struct cardstate *cs)
         unsigned long flags;
         struct gigaset_driver *drv = cs->driver;
         spin_lock_irqsave(&drv->lock, flags);
+        if (drv->flags[cs->minor_index] & VALID_MINOR)
+                module_put(drv->owner);
         drv->flags[cs->minor_index] = 0;
         spin_unlock_irqrestore(&drv->lock, flags);
 }
@@ -579,7 +582,7 @@ static struct bc_state *gigaset_initbcs(struct bc_state *bcs,
         } else if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL)
                 skb_reserve(bcs->skb, HW_HDR_LEN);
         else {
-                warn("could not allocate skb\n");
+                warn("could not allocate skb");
                 bcs->inputstate |= INS_skip_frame;
         }
 
@@ -632,17 +635,25 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
         int i;
 
         gig_dbg(DEBUG_INIT, "allocating cs");
-        cs = alloc_cs(drv);
-        if (!cs)
-                goto error;
+        if (!(cs = alloc_cs(drv))) {
+                err("maximum number of devices exceeded");
+                return NULL;
+        }
+        mutex_init(&cs->mutex);
+        mutex_lock(&cs->mutex);
+
         gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1);
         cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL);
-        if (!cs->bcs)
+        if (!cs->bcs) {
+                err("out of memory");
                 goto error;
+        }
         gig_dbg(DEBUG_INIT, "allocating inbuf");
         cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL);
-        if (!cs->inbuf)
+        if (!cs->inbuf) {
+                err("out of memory");
                 goto error;
+        }
 
         cs->cs_init = 0;
         cs->channels = channels;
@@ -654,8 +665,6 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
         spin_lock_init(&cs->ev_lock);
         cs->ev_tail = 0;
         cs->ev_head = 0;
-        mutex_init(&cs->mutex);
-        mutex_lock(&cs->mutex);
 
         tasklet_init(&cs->event_tasklet, &gigaset_handle_event,
                      (unsigned long) cs);
@@ -684,8 +693,10 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 
         for (i = 0; i < channels; ++i) {
                 gig_dbg(DEBUG_INIT, "setting up bcs[%d].read", i);
-                if (!gigaset_initbcs(cs->bcs + i, cs, i))
+                if (!gigaset_initbcs(cs->bcs + i, cs, i)) {
+                        err("could not allocate channel %d data", i);
                         goto error;
+                }
         }
 
         ++cs->cs_init;
@@ -720,8 +731,10 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
         make_valid(cs, VALID_ID);
         ++cs->cs_init;
         gig_dbg(DEBUG_INIT, "setting up hw");
-        if (!cs->ops->initcshw(cs))
+        if (!cs->ops->initcshw(cs)) {
+                err("could not allocate device specific data");
                 goto error;
+        }
 
         ++cs->cs_init;
 
@@ -743,8 +756,8 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
         mutex_unlock(&cs->mutex);
         return cs;
 
-error:  if (cs)
-                mutex_unlock(&cs->mutex);
+error:
+        mutex_unlock(&cs->mutex);
         gig_dbg(DEBUG_INIT, "failed");
         gigaset_freecs(cs);
         return NULL;
@@ -1040,7 +1053,6 @@ void gigaset_freedriver(struct gigaset_driver *drv)
         spin_unlock_irqrestore(&driver_lock, flags);
 
         gigaset_if_freedriver(drv);
-        module_put(drv->owner);
 
         kfree(drv->cs);
         kfree(drv->flags);
@@ -1072,10 +1084,6 @@ struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
         if (!drv)
                 return NULL;
 
-        if (!try_module_get(owner))
-                goto out1;
-
-        drv->cs = NULL;
         drv->have_tty = 0;
         drv->minor = minor;
         drv->minors = minors;
@@ -1087,11 +1095,11 @@ struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 
         drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL);
         if (!drv->cs)
-                goto out2;
+                goto error;
 
         drv->flags = kmalloc(minors * sizeof *drv->flags, GFP_KERNEL);
         if (!drv->flags)
-                goto out3;
+                goto error;
 
         for (i = 0; i < minors; ++i) {
                 drv->flags[i] = 0;
@@ -1108,11 +1116,8 @@ struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 
         return drv;
 
-out3:
+error:
         kfree(drv->cs);
-out2:
-        module_put(owner);
-out1:
         kfree(drv);
         return NULL;
 }
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 91e0c75aca8f..2db1ca4c6800 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -242,6 +242,7 @@ struct kvm_vcpu {
         u64 pdptrs[4]; /* pae */
         u64 shadow_efer;
         u64 apic_base;
+        u64 ia32_misc_enable_msr;
         int nmsrs;
         struct vmx_msr_entry *guest_msrs;
         struct vmx_msr_entry *host_msrs;
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index be4651abe72c..b10972ed0c9f 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1226,6 +1226,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
         case MSR_IA32_APICBASE:
                 data = vcpu->apic_base;
                 break;
+        case MSR_IA32_MISC_ENABLE:
+                data = vcpu->ia32_misc_enable_msr;
+                break;
 #ifdef CONFIG_X86_64
         case MSR_EFER:
                 data = vcpu->shadow_efer;
@@ -1297,6 +1300,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
         case MSR_IA32_APICBASE:
                 vcpu->apic_base = data;
                 break;
+        case MSR_IA32_MISC_ENABLE:
+                vcpu->ia32_misc_enable_msr = data;
+                break;
         default:
                 printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr);
                 return 1;
@@ -1600,6 +1606,10 @@ static u32 msrs_to_save[] = {
 
 static unsigned num_msrs_to_save;
 
+static u32 emulated_msrs[] = {
+        MSR_IA32_MISC_ENABLE,
+};
+
 static __init void kvm_init_msr_list(void)
 {
         u32 dummy[2];
@@ -1925,7 +1935,7 @@ static long kvm_dev_ioctl(struct file *filp,
                 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
                         goto out;
                 n = msr_list.nmsrs;
-                msr_list.nmsrs = num_msrs_to_save;
+                msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
                 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
                         goto out;
                 r = -E2BIG;
@@ -1935,6 +1945,11 @@ static long kvm_dev_ioctl(struct file *filp,
                 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
                                  num_msrs_to_save * sizeof(u32)))
                         goto out;
+                if (copy_to_user(user_msr_list->indices
+                                 + num_msrs_to_save * sizeof(u32),
+                                 &emulated_msrs,
+                                 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
+                        goto out;
                 r = 0;
                 break;
         }
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index c6f972914f08..22c426cd8cb2 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -143,6 +143,7 @@ static int dbg = 1;
 #define PFERR_PRESENT_MASK (1U << 0)
 #define PFERR_WRITE_MASK (1U << 1)
 #define PFERR_USER_MASK (1U << 2)
+#define PFERR_FETCH_MASK (1U << 4)
 
 #define PT64_ROOT_LEVEL 4
 #define PT32_ROOT_LEVEL 2
@@ -168,6 +169,11 @@ static int is_cpuid_PSE36(void)
         return 1;
 }
 
+static int is_nx(struct kvm_vcpu *vcpu)
+{
+        return vcpu->shadow_efer & EFER_NX;
+}
+
 static int is_present_pte(unsigned long pte)
 {
         return pte & PT_PRESENT_MASK;
@@ -992,16 +998,6 @@ static inline int fix_read_pf(u64 *shadow_ent)
         return 0;
 }
 
-static int may_access(u64 pte, int write, int user)
-{
-
-        if (user && !(pte & PT_USER_MASK))
-                return 0;
-        if (write && !(pte & PT_WRITABLE_MASK))
-                return 0;
-        return 1;
-}
-
 static void paging_free(struct kvm_vcpu *vcpu)
 {
         nonpaging_free(vcpu);
diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 6bc41950fbb3..149fa45fd9a5 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -63,13 +63,15 @@ struct guest_walker {
         pt_element_t *ptep;
         pt_element_t inherited_ar;
         gfn_t gfn;
+        u32 error_code;
 };
 
 /*
  * Fetch a guest pte for a guest virtual address
  */
-static void FNAME(walk_addr)(struct guest_walker *walker,
-                             struct kvm_vcpu *vcpu, gva_t addr)
+static int FNAME(walk_addr)(struct guest_walker *walker,
+                            struct kvm_vcpu *vcpu, gva_t addr,
+                            int write_fault, int user_fault, int fetch_fault)
 {
         hpa_t hpa;
         struct kvm_memory_slot *slot;
@@ -86,7 +88,7 @@ static void FNAME(walk_addr)(struct guest_walker *walker,
                 walker->ptep = &vcpu->pdptrs[(addr >> 30) & 3];
                 root = *walker->ptep;
                 if (!(root & PT_PRESENT_MASK))
-                        return;
+                        goto not_present;
                 --walker->level;
         }
 #endif
@@ -111,11 +113,23 @@ static void FNAME(walk_addr)(struct guest_walker *walker,
                 ASSERT(((unsigned long)walker->table & PAGE_MASK) ==
                        ((unsigned long)ptep & PAGE_MASK));
 
-                if (is_present_pte(*ptep) && !(*ptep &  PT_ACCESSED_MASK))
-                        *ptep |= PT_ACCESSED_MASK;
-
                 if (!is_present_pte(*ptep))
-                        break;
+                        goto not_present;
+
+                if (write_fault && !is_writeble_pte(*ptep))
+                        if (user_fault || is_write_protection(vcpu))
+                                goto access_error;
+
+                if (user_fault && !(*ptep & PT_USER_MASK))
+                        goto access_error;
+
+#if PTTYPE == 64
+                if (fetch_fault && is_nx(vcpu) && (*ptep & PT64_NX_MASK))
+                        goto access_error;
+#endif
+
+                if (!(*ptep & PT_ACCESSED_MASK))
+                        *ptep |= PT_ACCESSED_MASK;      /* avoid rmw */
 
                 if (walker->level == PT_PAGE_TABLE_LEVEL) {
                         walker->gfn = (*ptep & PT_BASE_ADDR_MASK)
@@ -146,6 +160,23 @@ static void FNAME(walk_addr)(struct guest_walker *walker,
         }
         walker->ptep = ptep;
         pgprintk("%s: pte %llx\n", __FUNCTION__, (u64)*ptep);
+        return 1;
+
+not_present:
+        walker->error_code = 0;
+        goto err;
+
+access_error:
+        walker->error_code = PFERR_PRESENT_MASK;
+
+err:
+        if (write_fault)
+                walker->error_code |= PFERR_WRITE_MASK;
+        if (user_fault)
+                walker->error_code |= PFERR_USER_MASK;
+        if (fetch_fault)
+                walker->error_code |= PFERR_FETCH_MASK;
+        return 0;
 }
 
 static void FNAME(release_walker)(struct guest_walker *walker)
@@ -347,8 +378,8 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
                                u32 error_code)
 {
         int write_fault = error_code & PFERR_WRITE_MASK;
-        int pte_present = error_code & PFERR_PRESENT_MASK;
         int user_fault = error_code & PFERR_USER_MASK;
+        int fetch_fault = error_code & PFERR_FETCH_MASK;
         struct guest_walker walker;
         u64 *shadow_pte;
         int fixed;
@@ -365,19 +396,20 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
         /*
          * Look up the shadow pte for the faulting address.
          */
-        FNAME(walk_addr)(&walker, vcpu, addr);
-        shadow_pte = FNAME(fetch)(vcpu, addr, &walker);
+        r = FNAME(walk_addr)(&walker, vcpu, addr, write_fault, user_fault,
+                             fetch_fault);
 
         /*
          * The page is not mapped by the guest.  Let the guest handle it.
          */
-        if (!shadow_pte) {
-                pgprintk("%s: not mapped\n", __FUNCTION__);
-                inject_page_fault(vcpu, addr, error_code);
+        if (!r) {
+                pgprintk("%s: guest page fault\n", __FUNCTION__);
+                inject_page_fault(vcpu, addr, walker.error_code);
                 FNAME(release_walker)(&walker);
                 return 0;
         }
 
+        shadow_pte = FNAME(fetch)(vcpu, addr, &walker);
         pgprintk("%s: shadow pte %p %llx\n", __FUNCTION__,
                  shadow_pte, *shadow_pte);
 
@@ -399,22 +431,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
          * mmio: emulate if accessible, otherwise its a guest fault.
          */
         if (is_io_pte(*shadow_pte)) {
-                if (may_access(*shadow_pte, write_fault, user_fault))
-                        return 1;
-                pgprintk("%s: io work, no access\n", __FUNCTION__);
-                inject_page_fault(vcpu, addr,
-                                  error_code | PFERR_PRESENT_MASK);
-                kvm_mmu_audit(vcpu, "post page fault (io)");
-                return 0;
-        }
-
-        /*
-         * pte not present, guest page fault.
-         */
-        if (pte_present && !fixed && !write_pt) {
-                inject_page_fault(vcpu, addr, error_code);
-                kvm_mmu_audit(vcpu, "post page fault (guest)");
-                return 0;
+                return 1;
         }
 
         ++kvm_stat.pf_fixed;
@@ -429,7 +446,7 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr)
         pt_element_t guest_pte;
         gpa_t gpa;
 
-        FNAME(walk_addr)(&walker, vcpu, vaddr);
+        FNAME(walk_addr)(&walker, vcpu, vaddr, 0, 0, 0);
         guest_pte = *walker.ptep;
         FNAME(release_walker)(&walker);
 
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 7397bfbbcb1c..9c70ff65e6b7 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -502,6 +502,7 @@ static void init_vmcb(struct vmcb *vmcb)
                                 (1ULL << INTERCEPT_IOIO_PROT) |
                                 (1ULL << INTERCEPT_MSR_PROT) |
                                 (1ULL << INTERCEPT_TASK_SWITCH) |
+                                (1ULL << INTERCEPT_SHUTDOWN) |
                                 (1ULL << INTERCEPT_VMRUN) |
                                 (1ULL << INTERCEPT_VMMCALL) |
                                 (1ULL << INTERCEPT_VMLOAD) |
@@ -680,14 +681,14 @@ static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
 
 static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 {
-        dt->limit = vcpu->svm->vmcb->save.ldtr.limit;
-        dt->base = vcpu->svm->vmcb->save.ldtr.base;
+        dt->limit = vcpu->svm->vmcb->save.idtr.limit;
+        dt->base = vcpu->svm->vmcb->save.idtr.base;
 }
 
 static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 {
-        vcpu->svm->vmcb->save.ldtr.limit = dt->limit;
-        vcpu->svm->vmcb->save.ldtr.base = dt->base ;
+        vcpu->svm->vmcb->save.idtr.limit = dt->limit;
+        vcpu->svm->vmcb->save.idtr.base = dt->base ;
 }
 
 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
@@ -892,6 +893,19 @@ static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         return 0;
 }
 
+static int shutdown_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+        /*
+         * VMCB is undefined after a SHUTDOWN intercept
+         * so reinitialize it.
+         */
+        memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
+        init_vmcb(vcpu->svm->vmcb);
+
+        kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
+        return 0;
+}
+
 static int io_get_override(struct kvm_vcpu *vcpu,
                           struct vmcb_seg **seg,
                           int *addr_override)
@@ -1249,6 +1263,7 @@ static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
         [SVM_EXIT_IOIO]                         = io_interception,
         [SVM_EXIT_MSR]                          = msr_interception,
         [SVM_EXIT_TASK_SWITCH]                  = task_switch_interception,
+        [SVM_EXIT_SHUTDOWN]                     = shutdown_interception,
         [SVM_EXIT_VMRUN]                        = invalid_op_interception,
         [SVM_EXIT_VMMCALL]                      = invalid_op_interception,
         [SVM_EXIT_VMLOAD]                       = invalid_op_interception,
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 5432d07c074d..11108165e264 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -479,9 +479,12 @@ static int bitmap_read_sb(struct bitmap *bitmap)
         int err = -EINVAL;
 
         /* page 0 is the superblock, read it... */
-        if (bitmap->file)
-                bitmap->sb_page = read_page(bitmap->file, 0, bitmap, PAGE_SIZE);
-        else {
+        if (bitmap->file) {
+                loff_t isize = i_size_read(bitmap->file->f_mapping->host);
+                int bytes = isize > PAGE_SIZE ? PAGE_SIZE : isize;
+
+                bitmap->sb_page = read_page(bitmap->file, 0, bitmap, bytes);
+        } else {
                 bitmap->sb_page = read_sb_page(bitmap->mddev, bitmap->offset, 0);
         }
         if (IS_ERR(bitmap->sb_page)) {
@@ -877,7 +880,8 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
                         int count;
                         /* unmap the old page, we're done with it */
                         if (index == num_pages-1)
-                                count = bytes - index * PAGE_SIZE;
+                                count = bytes + sizeof(bitmap_super_t)
+                                        - index * PAGE_SIZE;
                         else
                                 count = PAGE_SIZE;
                         if (index == 0) {
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index fe7c56e10435..3668b170ea68 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1116,7 +1116,8 @@ static int __bind(struct mapped_device *md, struct dm_table *t)
         if (size != get_capacity(md->disk))
                 memset(&md->geometry, 0, sizeof(md->geometry));
 
-        __set_size(md, size);
+        if (md->suspended_bdev)
+                __set_size(md, size);
         if (size == 0)
                 return 0;
 
@@ -1264,6 +1265,11 @@ int dm_swap_table(struct mapped_device *md, struct dm_table *table)
         if (!dm_suspended(md))
                 goto out;
 
+        /* without bdev, the device size cannot be changed */
+        if (!md->suspended_bdev)
+                if (get_capacity(md->disk) != dm_table_get_size(table))
+                        goto out;
+
         __unbind(md);
         r = __bind(md, table);
 
@@ -1341,11 +1347,14 @@ int dm_suspend(struct mapped_device *md, unsigned suspend_flags)
         /* This does not get reverted if there's an error later. */
         dm_table_presuspend_targets(map);
 
-        md->suspended_bdev = bdget_disk(md->disk, 0);
-        if (!md->suspended_bdev) {
-                DMWARN("bdget failed in dm_suspend");
-                r = -ENOMEM;
-                goto flush_and_out;
+        /* bdget() can stall if the pending I/Os are not flushed */
+        if (!noflush) {
+                md->suspended_bdev = bdget_disk(md->disk, 0);
+                if (!md->suspended_bdev) {
+                        DMWARN("bdget failed in dm_suspend");
+                        r = -ENOMEM;
+                        goto flush_and_out;
+                }
         }
 
         /*
@@ -1473,8 +1482,10 @@ int dm_resume(struct mapped_device *md)
 
         unlock_fs(md);
 
-        bdput(md->suspended_bdev);
-        md->suspended_bdev = NULL;
+        if (md->suspended_bdev) {
+                bdput(md->suspended_bdev);
+                md->suspended_bdev = NULL;
+        }
 
         clear_bit(DMF_SUSPENDED, &md->flags);
 
diff --git a/drivers/md/md.c b/drivers/md/md.c
index d1cb45f6d6a9..e8807ea5377d 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1633,7 +1633,8 @@ repeat:
          * and 'events' is odd, we can roll back to the previous clean state */
         if (nospares
             && (mddev->in_sync && mddev->recovery_cp == MaxSector)
-            && (mddev->events & 1))
+            && (mddev->events & 1)
+            && mddev->events != 1)
                 mddev->events--;
         else {
                 /* otherwise we have to go forward and ... */
@@ -3563,6 +3564,8 @@ static int get_bitmap_file(mddev_t * mddev, void __user * arg)
         char *ptr, *buf = NULL;
         int err = -ENOMEM;
 
+        md_allow_write(mddev);
+
         file = kmalloc(sizeof(*file), GFP_KERNEL);
         if (!file)
                 goto out;
@@ -5031,6 +5034,33 @@ void md_write_end(mddev_t *mddev)
         }
 }
 
+/* md_allow_write(mddev)
+ * Calling this ensures that the array is marked 'active' so that writes
+ * may proceed without blocking.  It is important to call this before
+ * attempting a GFP_KERNEL allocation while holding the mddev lock.
+ * Must be called with mddev_lock held.
+ */
+void md_allow_write(mddev_t *mddev)
+{
+        if (!mddev->pers)
+                return;
+        if (mddev->ro)
+                return;
+
+        spin_lock_irq(&mddev->write_lock);
+        if (mddev->in_sync) {
+                mddev->in_sync = 0;
+                set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+                if (mddev->safemode_delay &&
+                    mddev->safemode == 0)
+                        mddev->safemode = 1;
+                spin_unlock_irq(&mddev->write_lock);
+                md_update_sb(mddev, 0);
+        } else
+                spin_unlock_irq(&mddev->write_lock);
+}
+EXPORT_SYMBOL_GPL(md_allow_write);
+
 static DECLARE_WAIT_QUEUE_HEAD(resync_wait);
 
 #define SYNC_MARKS      10
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 164b25dca101..97ee870b265d 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1266,6 +1266,11 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio)
                                         sbio->bi_sector = r1_bio->sector +
                                                 conf->mirrors[i].rdev->data_offset;
                                         sbio->bi_bdev = conf->mirrors[i].rdev->bdev;
+                                        for (j = 0; j < vcnt ; j++)
+                                                memcpy(page_address(sbio->bi_io_vec[j].bv_page),
+                                                       page_address(pbio->bi_io_vec[j].bv_page),
+                                                       PAGE_SIZE);
+
                                 }
                         }
         }
@@ -2099,6 +2104,8 @@ static int raid1_reshape(mddev_t *mddev)
                 return -EINVAL;
         }
 
+        md_allow_write(mddev);
+
         raid_disks = mddev->raid_disks + mddev->delta_disks;
 
         if (raid_disks < conf->raid_disks) {
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index be008f034ada..467c16982d02 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -405,6 +405,8 @@ static int resize_stripes(raid5_conf_t *conf, int newsize)
         if (newsize <= conf->pool_size)
                 return 0; /* never bother to shrink */
 
+        md_allow_write(conf->mddev);
+
         /* Step 1 */
         sc = kmem_cache_create(conf->cache_name[1-conf->active_name],
                                sizeof(struct stripe_head)+(newsize-1)*sizeof(struct r5dev),
@@ -2678,7 +2680,7 @@ static int chunk_aligned_read(request_queue_t *q, struct bio * raid_bio)
         mdk_rdev_t *rdev;
 
         if (!in_chunk_boundary(mddev, raid_bio)) {
-                printk("chunk_aligned_read : non aligned\n");
+                PRINTK("chunk_aligned_read : non aligned\n");
                 return 0;
         }
         /*
@@ -3250,6 +3252,7 @@ raid5_store_stripe_cache_size(mddev_t *mddev, const char *page, size_t len)
                 else
                         break;
         }
+        md_allow_write(mddev);
         while (new > conf->max_nr_stripes) {
                 if (grow_one_stripe(conf))
                         conf->max_nr_stripes++;
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index 9418a59fb368..2ddd0cf07140 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -78,7 +78,7 @@ static struct attribute_group rtc_attr_group = {
         .attrs = rtc_attrs,
 };
 
-static int __devinit rtc_sysfs_add_device(struct class_device *class_dev,
+static int rtc_sysfs_add_device(struct class_device *class_dev,
                                         struct class_interface *class_intf)
 {
         int err;
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 6ed3f1da9296..8b41f9cc2560 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -1169,8 +1169,9 @@ static int setup(struct spi_device *spi)
                                 spi->bits_per_word - 16 : spi->bits_per_word)
                         | SSCR0_SSE
                         | (spi->bits_per_word > 16 ? SSCR0_EDSS : 0);
-        chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) << 4)
-                        | (((spi->mode & SPI_CPOL) != 0) << 3);
+        chip->cr1 &= ~(SSCR1_SPO | SSCR1_SPH);
+        chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) ? SSCR1_SPH : 0)
+                        | (((spi->mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0);
 
         /* NOTE:  PXA25x_SSP _could_ use external clocking ... */
         if (drv_data->ssp_type != PXA25x_SSP)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 270e6211c2e3..6307428d2c94 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -366,7 +366,6 @@ spi_alloc_master(struct device *dev, unsigned size)
 
         class_device_initialize(&master->cdev);
         master->cdev.class = &spi_master_class;
-        kobj_set_kset_s(&master->cdev, spi_master_class.subsys);
         master->cdev.dev = get_device(dev);
         spi_master_set_devdata(master, &master[1]);
 
@@ -466,14 +465,20 @@ EXPORT_SYMBOL_GPL(spi_unregister_master);
  */
 struct spi_master *spi_busnum_to_master(u16 bus_num)
 {
-        char                    name[9];
-        struct kobject          *bus;
-
-        snprintf(name, sizeof name, "spi%u", bus_num);
-        bus = kset_find_obj(&spi_master_class.subsys.kset, name);
-        if (bus)
-                return container_of(bus, struct spi_master, cdev.kobj);
-        return NULL;
+        struct class_device     *cdev;
+        struct spi_master       *master = NULL;
+        struct spi_master       *m;
+
+        down(&spi_master_class.sem);
+        list_for_each_entry(cdev, &spi_master_class.children, node) {
+                m = container_of(cdev, struct spi_master, cdev);
+                if (m->bus_num == bus_num) {
+                        master = spi_master_get(m);
+                        break;
+                }
+        }
+        up(&spi_master_class.sem);
+        return master;
 }
 EXPORT_SYMBOL_GPL(spi_busnum_to_master);
 
diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c
index 8ca08713528e..651379c51ae6 100644
--- a/drivers/spi/spi_s3c24xx.c
+++ b/drivers/spi/spi_s3c24xx.c
@@ -10,9 +10,6 @@
  *
 */
 
-
-//#define DEBUG
-
 #include <linux/init.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
@@ -44,6 +41,9 @@ struct s3c24xx_spi {
         int                      len;
         int                      count;
 
+        int                     (*set_cs)(struct s3c2410_spi_info *spi,
+                                          int cs, int pol);
+
         /* data buffers */
         const unsigned char     *tx;
         unsigned char           *rx;
@@ -64,6 +64,11 @@ static inline struct s3c24xx_spi *to_hw(struct spi_device *sdev)
         return spi_master_get_devdata(sdev->master);
 }
 
+static void s3c24xx_spi_gpiocs(struct s3c2410_spi_info *spi, int cs, int pol)
+{
+        s3c2410_gpio_setpin(spi->pin_cs, pol);
+}
+
 static void s3c24xx_spi_chipsel(struct spi_device *spi, int value)
 {
         struct s3c24xx_spi *hw = to_hw(spi);
@@ -72,10 +77,7 @@ static void s3c24xx_spi_chipsel(struct spi_device *spi, int value)
 
         switch (value) {
         case BITBANG_CS_INACTIVE:
-                if (hw->pdata->set_cs)
-                        hw->pdata->set_cs(hw->pdata, value, cspol);
-                else
-                        s3c2410_gpio_setpin(hw->pdata->pin_cs, cspol ^ 1);
+                hw->pdata->set_cs(hw->pdata, spi->chip_select, cspol^1);
                 break;
 
         case BITBANG_CS_ACTIVE:
@@ -96,14 +98,9 @@ static void s3c24xx_spi_chipsel(struct spi_device *spi, int value)
                 /* write new configration */
 
                 writeb(spcon, hw->regs + S3C2410_SPCON);
-
-                if (hw->pdata->set_cs)
-                        hw->pdata->set_cs(hw->pdata, value, cspol);
-                else
-                        s3c2410_gpio_setpin(hw->pdata->pin_cs, cspol);
+                hw->pdata->set_cs(hw->pdata, spi->chip_select, cspol);
 
                 break;
-
         }
 }
 
@@ -330,9 +327,12 @@ static int s3c24xx_spi_probe(struct platform_device *pdev)
         /* setup any gpio we can */
 
         if (!hw->pdata->set_cs) {
+                hw->set_cs = s3c24xx_spi_gpiocs;
+
                 s3c2410_gpio_setpin(hw->pdata->pin_cs, 1);
                 s3c2410_gpio_cfgpin(hw->pdata->pin_cs, S3C2410_GPIO_OUTPUT);
-        }
+        } else
+                hw->set_cs = hw->pdata->set_cs;
 
         /* register our spi controller */