49 files changed, 419 insertions, 354 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index d82875820a15..9d055b4f0585 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -135,9 +135,7 @@ config HAVE_DEFAULT_NO_SPIN_MUTEXES
 
 config HAVE_HW_BREAKPOINT
         bool
-        depends on HAVE_PERF_EVENTS
-        select ANON_INODES
-        select PERF_EVENTS
+        depends on PERF_EVENTS
 
 config HAVE_USER_RETURN_NOTIFIER
         bool
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 443448154f32..bd7261ea8f94 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -9,6 +9,7 @@ config ALPHA
         select HAVE_IDE
         select HAVE_OPROFILE
         select HAVE_SYSCALL_WRAPPERS
+        select HAVE_PERF_EVENTS
         help
           The Alpha is a 64-bit general-purpose processor designed and
           marketed by the Digital Equipment Corporation of blessed memory,
diff --git a/arch/alpha/include/asm/bug.h b/arch/alpha/include/asm/bug.h
index 1720c8ad86fe..f091682e3cc8 100644
--- a/arch/alpha/include/asm/bug.h
+++ b/arch/alpha/include/asm/bug.h
@@ -13,7 +13,8 @@
                 "call_pal %0  # bugchk\n\t"                             \
                 ".long %1\n\t.8byte %2"                                 \
                 : : "i"(PAL_bugchk), "i"(__LINE__), "i"(__FILE__));     \
-        for ( ; ; ); } while (0)
+        unreachable();                                                  \
+  } while (0)
 
 #define HAVE_ARCH_BUG
 #endif
diff --git a/arch/alpha/include/asm/perf_event.h b/arch/alpha/include/asm/perf_event.h
new file mode 100644
index 000000000000..3bef8522017c
--- /dev/null
+++ b/arch/alpha/include/asm/perf_event.h
@@ -0,0 +1,9 @@
+#ifndef __ASM_ALPHA_PERF_EVENT_H
+#define __ASM_ALPHA_PERF_EVENT_H
+
+/* Alpha only supports software events through this interface. */
+static inline void set_perf_event_pending(void) { }
+
+#define PERF_EVENT_INDEX_OFFSET 0
+
+#endif /* __ASM_ALPHA_PERF_EVENT_H */
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h
index 7f23665122df..804e5311c841 100644
--- a/arch/alpha/include/asm/unistd.h
+++ b/arch/alpha/include/asm/unistd.h
@@ -247,6 +247,7 @@
 #define __IGNORE_pause
 #define __IGNORE_time
 #define __IGNORE_utime
+#define __IGNORE_umount2
 
 /*
  * Linux-specific system calls begin at 300
@@ -434,10 +435,24 @@
 #define __NR_timerfd                    477
 #define __NR_eventfd                    478
 #define __NR_recvmmsg                   479
+#define __NR_fallocate                  480
+#define __NR_timerfd_create             481
+#define __NR_timerfd_settime            482
+#define __NR_timerfd_gettime            483
+#define __NR_signalfd4                  484
+#define __NR_eventfd2                   485
+#define __NR_epoll_create1              486
+#define __NR_dup3                       487
+#define __NR_pipe2                      488
+#define __NR_inotify_init1              489
+#define __NR_preadv                     490
+#define __NR_pwritev                    491
+#define __NR_rt_tgsigqueueinfo          492
+#define __NR_perf_event_open            493
 
 #ifdef __KERNEL__
 
-#define NR_SYSCALLS                     480
+#define NR_SYSCALLS                     494
 
 #define __ARCH_WANT_IPC_PARSE_VERSION
 #define __ARCH_WANT_OLD_READDIR
diff --git a/arch/alpha/kernel/systbls.S b/arch/alpha/kernel/systbls.S
index cda6b8b3d573..09acb786e72b 100644
--- a/arch/alpha/kernel/systbls.S
+++ b/arch/alpha/kernel/systbls.S
@@ -495,9 +495,23 @@ sys_call_table:
         .quad sys_epoll_pwait
         .quad sys_utimensat                     /* 475 */
         .quad sys_signalfd
-        .quad sys_ni_syscall
+        .quad sys_ni_syscall                    /* sys_timerfd */
         .quad sys_eventfd
         .quad sys_recvmmsg
+        .quad sys_fallocate                             /* 480 */
+        .quad sys_timerfd_create
+        .quad sys_timerfd_settime
+        .quad sys_timerfd_gettime
+        .quad sys_signalfd4
+        .quad sys_eventfd2                              /* 485 */
+        .quad sys_epoll_create1
+        .quad sys_dup3
+        .quad sys_pipe2
+        .quad sys_inotify_init1
+        .quad sys_preadv                                /* 490 */
+        .quad sys_pwritev
+        .quad sys_rt_tgsigqueueinfo
+        .quad sys_perf_event_open
 
         .size sys_call_table, . - sys_call_table
         .type sys_call_table, @object
diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c
index 6118890c946d..6be4503201ac 100644
--- a/arch/s390/crypto/aes_s390.c
+++ b/arch/s390/crypto/aes_s390.c
@@ -174,7 +174,7 @@ static int fallback_init_cip(struct crypto_tfm *tfm)
         if (IS_ERR(sctx->fallback.cip)) {
                 pr_err("Allocating AES fallback algorithm %s failed\n",
                        name);
-                return PTR_ERR(sctx->fallback.blk);
+                return PTR_ERR(sctx->fallback.cip);
         }
 
         return 0;
diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index 77df726180ba..2b92d501425f 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -164,7 +164,7 @@ static inline void part_hdr__part_name(enum diag204_format type, void *hdr,
                        LPAR_NAME_LEN);
         EBCASC(name, LPAR_NAME_LEN);
         name[LPAR_NAME_LEN] = 0;
-        strstrip(name);
+        strim(name);
 }
 
 struct cpu_info {
@@ -523,7 +523,7 @@ static int diag224_idx2name(int index, char *name)
         memcpy(name, diag224_cpu_names + ((index + 1) * CPU_NAME_LEN),
                 CPU_NAME_LEN);
         name[CPU_NAME_LEN] = 0;
-        strstrip(name);
+        strim(name);
         return 0;
 }
 
diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index d01fc8f799f0..f0b0d31f0b48 100644
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -124,7 +124,7 @@ static int hpyfs_vm_create_guest(struct super_block *sb,
         /* guest dir */
         memcpy(guest_name, data->guest_name, NAME_LEN);
         EBCASC(guest_name, NAME_LEN);
-        strstrip(guest_name);
+        strim(guest_name);
         guest_dir = hypfs_mkdir(sb, systems_dir, guest_name);
         if (IS_ERR(guest_dir))
                 return PTR_ERR(guest_dir);
diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
index cb5232df151e..192a7203a14f 100644
--- a/arch/s390/include/asm/unistd.h
+++ b/arch/s390/include/asm/unistd.h
@@ -269,7 +269,8 @@
 #define __NR_pwritev            329
 #define __NR_rt_tgsigqueueinfo  330
 #define __NR_perf_event_open    331
-#define NR_syscalls 332
+#define __NR_recvmmsg           332
+#define NR_syscalls 333
 
 /* 
  * There are some system calls that are not present on 64 bit, some
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 30de2d0e52bb..faeaccc7d7d9 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1853,3 +1853,12 @@ sys32_execve_wrapper:
         llgtr   %r3,%r3                 # compat_uptr_t *
         llgtr   %r4,%r4                 # compat_uptr_t *
         jg      sys32_execve            # branch to system call
+
+        .globl  compat_sys_recvmmsg_wrapper
+compat_sys_recvmmsg_wrapper:
+        lgfr    %r2,%r2                 # int
+        llgtr   %r3,%r3                 # struct compat_mmsghdr *
+        llgfr   %r4,%r4                 # unsigned int
+        llgfr   %r5,%r5                 # unsigned int
+        llgtr   %r6,%r6                 # struct compat_timespec *
+        jg      compat_sys_recvmmsg
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 4890ac6d7faa..4d73296fed74 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -221,7 +221,7 @@ static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
                 const char *buf, size_t len)                            \
 {                                                                       \
         strncpy(_value, buf, sizeof(_value) - 1);                       \
-        strstrip(_value);                                               \
+        strim(_value);                                                  \
         return len;                                                     \
 }                                                                       \
 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
@@ -472,7 +472,7 @@ static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
                 return sprintf(page, "#unknown#\n");
         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
         EBCASC(loadparm, LOADPARM_LEN);
-        strstrip(loadparm);
+        strim(loadparm);
         return sprintf(page, "%s\n", loadparm);
 }
 
@@ -776,7 +776,7 @@ static void reipl_get_ascii_loadparm(char *loadparm,
         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
         EBCASC(loadparm, LOADPARM_LEN);
         loadparm[LOADPARM_LEN] = 0;
-        strstrip(loadparm);
+        strim(loadparm);
 }
 
 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 653c6a178740..13815d39f7dd 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -959,7 +959,7 @@ static const struct user_regset s390_compat_regsets[] = {
                 .set = s390_fpregs_set,
         },
         [REGSET_GENERAL_EXTENDED] = {
-                .core_note_type = NT_PRXSTATUS,
+                .core_note_type = NT_S390_HIGH_GPRS,
                 .n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
                 .size = sizeof(compat_long_t),
                 .align = sizeof(compat_long_t),
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 30eca070d426..4f292c936872 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -340,3 +340,4 @@ SYSCALL(sys_preadv,sys_preadv,compat_sys_preadv_wrapper)
 SYSCALL(sys_pwritev,sys_pwritev,compat_sys_pwritev_wrapper)
 SYSCALL(sys_rt_tgsigqueueinfo,sys_rt_tgsigqueueinfo,compat_sys_rt_tgsigqueueinfo_wrapper) /* 330 */
 SYSCALL(sys_perf_event_open,sys_perf_event_open,sys_perf_event_open_wrapper)
+SYSCALL(sys_recvmmsg,sys_recvmmsg,compat_sys_recvmmsg_wrapper)
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index c2e42cc65ce7..6e7ad63854c0 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -18,7 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/errno.h>
-#include <linux/ptrace.h>
+#include <linux/tracehook.h>
 #include <linux/timer.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
@@ -382,7 +382,7 @@ void __kprobes do_single_step(struct pt_regs *regs)
                                         SIGTRAP) == NOTIFY_STOP){
                 return;
         }
-        if ((current->ptrace & PT_PTRACED) != 0)
+        if (tracehook_consider_fatal_signal(current, SIGTRAP))
                 force_sig(SIGTRAP, current);
 }
 
@@ -483,7 +483,7 @@ static void illegal_op(struct pt_regs * regs, long interruption_code)
                 if (get_user(*((__u16 *) opcode), (__u16 __user *) location))
                         return;
                 if (*((__u16 *) opcode) == S390_BREAKPOINT_U16) {
-                        if (current->ptrace & PT_PTRACED)
+                        if (tracehook_consider_fatal_signal(current, SIGTRAP))
                                 force_sig(SIGTRAP, current);
                         else
                                 signal = SIGILL;
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3b2a5aca4edb..55298e891571 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -50,6 +50,8 @@ config X86
         select HAVE_KERNEL_BZIP2
         select HAVE_KERNEL_LZMA
         select HAVE_HW_BREAKPOINT
+        select PERF_EVENTS
+        select ANON_INODES
         select HAVE_ARCH_KMEMCHECK
         select HAVE_USER_RETURN_NOTIFIER
 
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 613700f27a4a..637e1ec963c3 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -153,6 +153,7 @@
 #define X86_FEATURE_SSE5        (6*32+11) /* SSE-5 */
 #define X86_FEATURE_SKINIT      (6*32+12) /* SKINIT/STGI instructions */
 #define X86_FEATURE_WDT         (6*32+13) /* Watchdog timer */
+#define X86_FEATURE_NODEID_MSR  (6*32+19) /* NodeId MSR */
 
 /*
  * Auxiliary flags: Linux defined - For features scattered in various
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 08c48a81841f..eeac829a0f44 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -103,7 +103,8 @@ extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
 extern void send_cleanup_vector(struct irq_cfg *);
 
 struct irq_desc;
-extern unsigned int set_desc_affinity(struct irq_desc *, const struct cpumask *);
+extern unsigned int set_desc_affinity(struct irq_desc *, const struct cpumask *,
+                                      unsigned int *dest_id);
 extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
 extern void setup_ioapic_dest(void);
 
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 4ffe09b2ad75..1cd58cdbc03f 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -12,6 +12,7 @@
 #define MSR_FS_BASE             0xc0000100 /* 64bit FS base */
 #define MSR_GS_BASE             0xc0000101 /* 64bit GS base */
 #define MSR_KERNEL_GS_BASE      0xc0000102 /* SwapGS GS shadow */
+#define MSR_TSC_AUX             0xc0000103 /* Auxiliary TSC */
 
 /* EFER bits: */
 #define _EFER_SCE               0  /* SYSCALL/SYSRET */
@@ -123,6 +124,7 @@
 #define FAM10H_MMIO_CONF_BUSRANGE_SHIFT 2
 #define FAM10H_MMIO_CONF_BASE_MASK      0xfffffff
 #define FAM10H_MMIO_CONF_BASE_SHIFT     20
+#define MSR_FAM10H_NODE_ID              0xc001100c
 
 /* K8 MSRs */
 #define MSR_K8_TOP_MEM1                 0xc001001a
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 2d228fc9b4b7..c5bc4c2d33f5 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -27,6 +27,18 @@ struct msr {
         };
 };
 
+struct msr_info {
+        u32 msr_no;
+        struct msr reg;
+        struct msr *msrs;
+        int err;
+};
+
+struct msr_regs_info {
+        u32 *regs;
+        int err;
+};
+
 static inline unsigned long long native_read_tscp(unsigned int *aux)
 {
         unsigned long low, high;
@@ -240,9 +252,9 @@ do {                                                            \
 #define checking_wrmsrl(msr, val) wrmsr_safe((msr), (u32)(val),         \
                                              (u32)((val) >> 32))
 
-#define write_tsc(val1, val2) wrmsr(0x10, (val1), (val2))
+#define write_tsc(val1, val2) wrmsr(MSR_IA32_TSC, (val1), (val2))
 
-#define write_rdtscp_aux(val) wrmsr(0xc0000103, (val), 0)
+#define write_rdtscp_aux(val) wrmsr(MSR_TSC_AUX, (val), 0)
 
 struct msr *msrs_alloc(void);
 void msrs_free(struct msr *msrs);
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 6f8ec1c37e0a..fc801bab1b3b 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -181,7 +181,7 @@ static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
                                 unsigned int *ecx, unsigned int *edx)
 {
         /* ecx is often an input as well as an output. */
-        asm("cpuid"
+        asm volatile("cpuid"
             : "=a" (*eax),
               "=b" (*ebx),
               "=c" (*ecx),
diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index cf86a5e73815..35e89122a42f 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -5,6 +5,29 @@ extern int kstack_depth_to_print;
 
 int x86_is_stack_id(int id, char *name);
 
+struct thread_info;
+struct stacktrace_ops;
+
+typedef unsigned long (*walk_stack_t)(struct thread_info *tinfo,
+                                      unsigned long *stack,
+                                      unsigned long bp,
+                                      const struct stacktrace_ops *ops,
+                                      void *data,
+                                      unsigned long *end,
+                                      int *graph);
+
+extern unsigned long
+print_context_stack(struct thread_info *tinfo,
+                    unsigned long *stack, unsigned long bp,
+                    const struct stacktrace_ops *ops, void *data,
+                    unsigned long *end, int *graph);
+
+extern unsigned long
+print_context_stack_bp(struct thread_info *tinfo,
+                       unsigned long *stack, unsigned long bp,
+                       const struct stacktrace_ops *ops, void *data,
+                       unsigned long *end, int *graph);
+
 /* Generic stack tracer with callbacks */
 
 struct stacktrace_ops {
@@ -14,6 +37,7 @@ struct stacktrace_ops {
         void (*address)(void *data, unsigned long address, int reliable);
         /* On negative return stop dumping */
         int (*stack)(void *data, char *name);
+        walk_stack_t    walk_stack;
 };
 
 void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index d0c99abc26c3..eacbd2b31d27 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -306,10 +306,7 @@ physflat_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
                 if (cpumask_test_cpu(cpu, cpu_online_mask))
                         break;
         }
-        if (cpu < nr_cpu_ids)
-                return per_cpu(x86_cpu_to_apicid, cpu);
-
-        return BAD_APICID;
+        return per_cpu(x86_cpu_to_apicid, cpu);
 }
 
 struct apic apic_physflat =  {
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index 38dcecfa5818..cb804c5091b9 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -131,10 +131,7 @@ static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
                 if (cpumask_test_cpu(cpu, cpu_online_mask))
                         break;
         }
-        if (cpu < nr_cpu_ids)
-                return bigsmp_cpu_to_logical_apicid(cpu);
-
-        return BAD_APICID;
+        return bigsmp_cpu_to_logical_apicid(cpu);
 }
 
 static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 11a5851f1f50..de00c4619a55 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2276,26 +2276,28 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq
 
 /*
  * Either sets desc->affinity to a valid value, and returns
- * ->cpu_mask_to_apicid of that, or returns BAD_APICID and
+ * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and
  * leaves desc->affinity untouched.
  */
 unsigned int
-set_desc_affinity(struct irq_desc *desc, const struct cpumask *mask)
+set_desc_affinity(struct irq_desc *desc, const struct cpumask *mask,
+                  unsigned int *dest_id)
 {
         struct irq_cfg *cfg;
         unsigned int irq;
 
         if (!cpumask_intersects(mask, cpu_online_mask))
-                return BAD_APICID;
+                return -1;
 
         irq = desc->irq;
         cfg = desc->chip_data;
         if (assign_irq_vector(irq, cfg, mask))
-                return BAD_APICID;
+                return -1;
 
         cpumask_copy(desc->affinity, mask);
 
-        return apic->cpu_mask_to_apicid_and(desc->affinity, cfg->domain);
+        *dest_id = apic->cpu_mask_to_apicid_and(desc->affinity, cfg->domain);
+        return 0;
 }
 
 static int
@@ -2311,12 +2313,11 @@ set_ioapic_affinity_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
         cfg = desc->chip_data;
 
         spin_lock_irqsave(&ioapic_lock, flags);
-        dest = set_desc_affinity(desc, mask);
-        if (dest != BAD_APICID) {
+        ret = set_desc_affinity(desc, mask, &dest);
+        if (!ret) {
                 /* Only the high 8 bits are valid. */
                 dest = SET_APIC_LOGICAL_ID(dest);
                 __target_IO_APIC_irq(irq, dest, cfg);
-                ret = 0;
         }
         spin_unlock_irqrestore(&ioapic_lock, flags);
 
@@ -3351,8 +3352,7 @@ static int set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
         struct msi_msg msg;
         unsigned int dest;
 
-        dest = set_desc_affinity(desc, mask);
-        if (dest == BAD_APICID)
+        if (set_desc_affinity(desc, mask, &dest))
                 return -1;
 
         cfg = desc->chip_data;
@@ -3384,8 +3384,7 @@ ir_set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
         if (get_irte(irq, &irte))
                 return -1;
 
-        dest = set_desc_affinity(desc, mask);
-        if (dest == BAD_APICID)
+        if (set_desc_affinity(desc, mask, &dest))
                 return -1;
 
         irte.vector = cfg->vector;
@@ -3567,8 +3566,7 @@ static int dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
         struct msi_msg msg;
         unsigned int dest;
 
-        dest = set_desc_affinity(desc, mask);
-        if (dest == BAD_APICID)
+        if (set_desc_affinity(desc, mask, &dest))
                 return -1;
 
         cfg = desc->chip_data;
@@ -3623,8 +3621,7 @@ static int hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
         struct msi_msg msg;
         unsigned int dest;
 
-        dest = set_desc_affinity(desc, mask);
-        if (dest == BAD_APICID)
+        if (set_desc_affinity(desc, mask, &dest))
                 return -1;
 
         cfg = desc->chip_data;
@@ -3730,8 +3727,7 @@ static int set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask)
         struct irq_cfg *cfg;
         unsigned int dest;
 
-        dest = set_desc_affinity(desc, mask);
-        if (dest == BAD_APICID)
+        if (set_desc_affinity(desc, mask, &dest))
                 return -1;
 
         cfg = desc->chip_data;
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index a5371ec36776..cf69c59f4910 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -148,10 +148,7 @@ x2apic_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
                         break;
         }
 
-        if (cpu < nr_cpu_ids)
-                return per_cpu(x86_cpu_to_logical_apicid, cpu);
-
-        return BAD_APICID;
+        return per_cpu(x86_cpu_to_logical_apicid, cpu);
 }
 
 static unsigned int x2apic_cluster_phys_get_apic_id(unsigned long x)
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index a8989aadc99a..8972f38c5ced 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -146,10 +146,7 @@ x2apic_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
                         break;
         }
 
-        if (cpu < nr_cpu_ids)
-                return per_cpu(x86_cpu_to_apicid, cpu);
-
-        return BAD_APICID;
+        return per_cpu(x86_cpu_to_apicid, cpu);
 }
 
 static unsigned int x2apic_phys_get_apic_id(unsigned long x)
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index b684bb303cbf..d56b0efb2057 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -225,10 +225,7 @@ uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
                 if (cpumask_test_cpu(cpu, cpu_online_mask))
                         break;
         }
-        if (cpu < nr_cpu_ids)
-                return per_cpu(x86_cpu_to_apicid, cpu);
-
-        return BAD_APICID;
+        return per_cpu(x86_cpu_to_apicid, cpu);
 }
 
 static unsigned int x2apic_get_apic_id(unsigned long x)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 8dc3ea145c97..e485825130d2 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -254,59 +254,36 @@ static int __cpuinit nearby_node(int apicid)
 
 /*
  * Fixup core topology information for AMD multi-node processors.
- * Assumption 1: Number of cores in each internal node is the same.
- * Assumption 2: Mixed systems with both single-node and dual-node
- *               processors are not supported.
+ * Assumption: Number of cores in each internal node is the same.
  */
 #ifdef CONFIG_X86_HT
 static void __cpuinit amd_fixup_dcm(struct cpuinfo_x86 *c)
 {
-#ifdef CONFIG_PCI
-        u32 t, cpn;
-        u8 n, n_id;
+        unsigned long long value;
+        u32 nodes, cores_per_node;
         int cpu = smp_processor_id();
 
+        if (!cpu_has(c, X86_FEATURE_NODEID_MSR))
+                return;
+
         /* fixup topology information only once for a core */
         if (cpu_has(c, X86_FEATURE_AMD_DCM))
                 return;
 
-        /* check for multi-node processor on boot cpu */
-        t = read_pci_config(0, 24, 3, 0xe8);
-        if (!(t & (1 << 29)))
+        rdmsrl(MSR_FAM10H_NODE_ID, value);
+
+        nodes = ((value >> 3) & 7) + 1;
+        if (nodes == 1)
                 return;
 
         set_cpu_cap(c, X86_FEATURE_AMD_DCM);
+        cores_per_node = c->x86_max_cores / nodes;
 
-        /* cores per node: each internal node has half the number of cores */
-        cpn = c->x86_max_cores >> 1;
+        /* store NodeID, use llc_shared_map to store sibling info */
+        per_cpu(cpu_llc_id, cpu) = value & 7;
 
-        /* even-numbered NB_id of this dual-node processor */
-        n = c->phys_proc_id << 1;
-
-        /*
-         * determine internal node id and assign cores fifty-fifty to
-         * each node of the dual-node processor
-         */
-        t = read_pci_config(0, 24 + n, 3, 0xe8);
-        n = (t>>30) & 0x3;
-        if (n == 0) {
-                if (c->cpu_core_id < cpn)
-                        n_id = 0;
-                else
-                        n_id = 1;
-        } else {
-                if (c->cpu_core_id < cpn)
-                        n_id = 1;
-                else
-                        n_id = 0;
-        }
-
-        /* compute entire NodeID, use llc_shared_map to store sibling info */
-        per_cpu(cpu_llc_id, cpu) = (c->phys_proc_id << 1) + n_id;
-
-        /* fixup core id to be in range from 0 to cpn */
-        c->cpu_core_id = c->cpu_core_id % cpn;
-#endif
+        /* fixup core id to be in range from 0 to (cores_per_node - 1) */
+        c->cpu_core_id = c->cpu_core_id % cores_per_node;
 }
 #endif
 
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 9c31e8b09d2c..879666f4d871 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -70,7 +70,6 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
         if (c->x86_power & (1 << 8)) {
                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
                 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
-                set_cpu_cap(c, X86_FEATURE_TSC_RELIABLE);
                 sched_clock_stable = 1;
         }
 
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 45506d5dd8df..c223b7e895d9 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -2336,6 +2336,7 @@ static const struct stacktrace_ops backtrace_ops = {
         .warning_symbol         = backtrace_warning_symbol,
         .stack                  = backtrace_stack,
         .address                = backtrace_address,
+        .walk_stack             = print_context_stack_bp,
 };
 
 #include "../dumpstack.h"
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 7ef24a796992..cb27fd6136c9 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -187,7 +187,8 @@ static int __init cpuid_init(void)
         int i, err = 0;
         i = 0;
 
-        if (register_chrdev(CPUID_MAJOR, "cpu/cpuid", &cpuid_fops)) {
+        if (__register_chrdev(CPUID_MAJOR, 0, NR_CPUS,
+                              "cpu/cpuid", &cpuid_fops)) {
                 printk(KERN_ERR "cpuid: unable to get major %d for cpuid\n",
                        CPUID_MAJOR);
                 err = -EBUSY;
@@ -216,7 +217,7 @@ out_class:
         }
         class_destroy(cpuid_class);
 out_chrdev:
-        unregister_chrdev(CPUID_MAJOR, "cpu/cpuid");
+        __unregister_chrdev(CPUID_MAJOR, 0, NR_CPUS, "cpu/cpuid");
 out:
         return err;
 }
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 0a0aa1cec8f1..c56bc2873030 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -109,6 +109,30 @@ print_context_stack(struct thread_info *tinfo,
         }
         return bp;
 }
+EXPORT_SYMBOL_GPL(print_context_stack);
+
+unsigned long
+print_context_stack_bp(struct thread_info *tinfo,
+                       unsigned long *stack, unsigned long bp,
+                       const struct stacktrace_ops *ops, void *data,
+                       unsigned long *end, int *graph)
+{
+        struct stack_frame *frame = (struct stack_frame *)bp;
+        unsigned long *ret_addr = &frame->return_address;
+
+        while (valid_stack_ptr(tinfo, ret_addr, sizeof(*ret_addr), end)) {
+                unsigned long addr = *ret_addr;
+
+                if (__kernel_text_address(addr)) {
+                        ops->address(data, addr, 1);
+                        frame = frame->next_frame;
+                        ret_addr = &frame->return_address;
+                        print_ftrace_graph_addr(addr, data, ops, tinfo, graph);
+                }
+        }
+        return (unsigned long)frame;
+}
+EXPORT_SYMBOL_GPL(print_context_stack_bp);
 
 
 static void
@@ -141,10 +165,11 @@ static void print_trace_address(void *data, unsigned long addr, int reliable)
 }
 
 static const struct stacktrace_ops print_trace_ops = {
-        .warning = print_trace_warning,
-        .warning_symbol = print_trace_warning_symbol,
-        .stack = print_trace_stack,
-        .address = print_trace_address,
+        .warning                = print_trace_warning,
+        .warning_symbol         = print_trace_warning_symbol,
+        .stack                  = print_trace_stack,
+        .address                = print_trace_address,
+        .walk_stack             = print_context_stack,
 };
 
 void
diff --git a/arch/x86/kernel/dumpstack.h b/arch/x86/kernel/dumpstack.h
index 81086c227ab7..4fd1420faffa 100644
--- a/arch/x86/kernel/dumpstack.h
+++ b/arch/x86/kernel/dumpstack.h
@@ -14,12 +14,6 @@
 #define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
 #endif
 
-extern unsigned long
-print_context_stack(struct thread_info *tinfo,
-                unsigned long *stack, unsigned long bp,
-                const struct stacktrace_ops *ops, void *data,
-                unsigned long *end, int *graph);
-
 extern void
 show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
                 unsigned long *stack, unsigned long bp, char *log_lvl);
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index e0ed4c7abb62..ae775ca47b25 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -58,7 +58,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
 
                 context = (struct thread_info *)
                         ((unsigned long)stack & (~(THREAD_SIZE - 1)));
-                bp = print_context_stack(context, stack, bp, ops, data, NULL, &graph);
+                bp = ops->walk_stack(context, stack, bp, ops, data, NULL, &graph);
 
                 stack = (unsigned long *)context->previous_esp;
                 if (!stack)
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index b13af53883aa..0ad9597073f5 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -188,8 +188,8 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
                         if (ops->stack(data, id) < 0)
                                 break;
 
-                        bp = print_context_stack(tinfo, stack, bp, ops,
-                                                 data, estack_end, &graph);
+                        bp = ops->walk_stack(tinfo, stack, bp, ops,
+                                             data, estack_end, &graph);
                         ops->stack(data, "<EOE>");
                         /*
                          * We link to the next stack via the
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index f50447d961c0..05ed7ab2ca48 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -724,7 +724,7 @@ core_initcall(e820_mark_nvs_memory);
 /*
  * Early reserved memory areas.
  */
-#define MAX_EARLY_RES 20
+#define MAX_EARLY_RES 32
 
 struct early_res {
         u64 start, end;
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 572b07eee3f4..4bd93c9b2b27 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -246,7 +246,7 @@ static int __init msr_init(void)
         int i, err = 0;
         i = 0;
 
-        if (register_chrdev(MSR_MAJOR, "cpu/msr", &msr_fops)) {
+        if (__register_chrdev(MSR_MAJOR, 0, NR_CPUS, "cpu/msr", &msr_fops)) {
                 printk(KERN_ERR "msr: unable to get major %d for msr\n",
                        MSR_MAJOR);
                 err = -EBUSY;
@@ -274,7 +274,7 @@ out_class:
                 msr_device_destroy(i);
         class_destroy(msr_class);
 out_chrdev:
-        unregister_chrdev(MSR_MAJOR, "cpu/msr");
+        __unregister_chrdev(MSR_MAJOR, 0, NR_CPUS, "cpu/msr");
 out:
         return err;
 }
diff --git a/arch/x86/kernel/stacktrace.c b/arch/x86/kernel/stacktrace.c
index c3eb207181fe..922eefbb3f6c 100644
--- a/arch/x86/kernel/stacktrace.c
+++ b/arch/x86/kernel/stacktrace.c
@@ -53,17 +53,19 @@ save_stack_address_nosched(void *data, unsigned long addr, int reliable)
 }
 
 static const struct stacktrace_ops save_stack_ops = {
-        .warning = save_stack_warning,
-        .warning_symbol = save_stack_warning_symbol,
-        .stack = save_stack_stack,
-        .address = save_stack_address,
+        .warning        = save_stack_warning,
+        .warning_symbol = save_stack_warning_symbol,
+        .stack          = save_stack_stack,
+        .address        = save_stack_address,
+        .walk_stack     = print_context_stack,
 };
 
 static const struct stacktrace_ops save_stack_ops_nosched = {
-        .warning = save_stack_warning,
-        .warning_symbol = save_stack_warning_symbol,
-        .stack = save_stack_stack,
-        .address = save_stack_address_nosched,
+        .warning        = save_stack_warning,
+        .warning_symbol = save_stack_warning_symbol,
+        .stack          = save_stack_stack,
+        .address        = save_stack_address_nosched,
+        .walk_stack     = print_context_stack,
 };
 
 /*
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index cd982f48e23e..597683aa5ba0 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -763,6 +763,7 @@ void mark_tsc_unstable(char *reason)
 {
         if (!tsc_unstable) {
                 tsc_unstable = 1;
+                sched_clock_stable = 0;
                 printk(KERN_INFO "Marking TSC unstable due to %s\n", reason);
                 /* Change only the rating, when not registered */
                 if (clocksource_tsc.mult)
diff --git a/arch/x86/kernel/uv_irq.c b/arch/x86/kernel/uv_irq.c
index 61d805df4c91..ece73d8e3240 100644
--- a/arch/x86/kernel/uv_irq.c
+++ b/arch/x86/kernel/uv_irq.c
@@ -215,8 +215,7 @@ static int uv_set_irq_affinity(unsigned int irq, const struct cpumask *mask)
         unsigned long mmr_offset;
         unsigned mmr_pnode;
 
-        dest = set_desc_affinity(desc, mask);
-        if (dest == BAD_APICID)
+        if (set_desc_affinity(desc, mask, &dest))
                 return -1;
 
         mmr_value = 0;
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 45b20e486c2f..cffd754f3039 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -14,7 +14,7 @@ $(obj)/inat.o: $(obj)/inat-tables.c
 
 clean-files := inat-tables.c
 
-obj-$(CONFIG_SMP) := msr.o
+obj-$(CONFIG_SMP) += msr-smp.o
 
 lib-y := delay.o
 lib-y += thunk_$(BITS).o
@@ -22,7 +22,7 @@ lib-y += usercopy_$(BITS).o getuser.o putuser.o
 lib-y += memcpy_$(BITS).o
 lib-$(CONFIG_KPROBES) += insn.o inat.o
 
-obj-y += msr-reg.o msr-reg-export.o
+obj-y += msr.o msr-reg.o msr-reg-export.o
 
 ifeq ($(CONFIG_X86_32),y)
         obj-y += atomic64_32.o
diff --git a/arch/x86/lib/msr-smp.c b/arch/x86/lib/msr-smp.c
new file mode 100644
index 000000000000..a6b1b86d2253
--- /dev/null
+++ b/arch/x86/lib/msr-smp.c
@@ -0,0 +1,204 @@
+#include <linux/module.h>
+#include <linux/preempt.h>
+#include <linux/smp.h>
+#include <asm/msr.h>
+
+static void __rdmsr_on_cpu(void *info)
+{
+        struct msr_info *rv = info;
+        struct msr *reg;
+        int this_cpu = raw_smp_processor_id();
+
+        if (rv->msrs)
+                reg = per_cpu_ptr(rv->msrs, this_cpu);
+        else
+                reg = &rv->reg;
+
+        rdmsr(rv->msr_no, reg->l, reg->h);
+}
+
+static void __wrmsr_on_cpu(void *info)
+{
+        struct msr_info *rv = info;
+        struct msr *reg;
+        int this_cpu = raw_smp_processor_id();
+
+        if (rv->msrs)
+                reg = per_cpu_ptr(rv->msrs, this_cpu);
+        else
+                reg = &rv->reg;
+
+        wrmsr(rv->msr_no, reg->l, reg->h);
+}
+
+int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
+{
+        int err;
+        struct msr_info rv;
+
+        memset(&rv, 0, sizeof(rv));
+
+        rv.msr_no = msr_no;
+        err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1);
+        *l = rv.reg.l;
+        *h = rv.reg.h;
+
+        return err;
+}
+EXPORT_SYMBOL(rdmsr_on_cpu);
+
+int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
+{
+        int err;
+        struct msr_info rv;
+
+        memset(&rv, 0, sizeof(rv));
+
+        rv.msr_no = msr_no;
+        rv.reg.l = l;
+        rv.reg.h = h;
+        err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
+
+        return err;
+}
+EXPORT_SYMBOL(wrmsr_on_cpu);
+
+static void __rwmsr_on_cpus(const struct cpumask *mask, u32 msr_no,
+                            struct msr *msrs,
+                            void (*msr_func) (void *info))
+{
+        struct msr_info rv;
+        int this_cpu;
+
+        memset(&rv, 0, sizeof(rv));
+
+        rv.msrs   = msrs;
+        rv.msr_no = msr_no;
+
+        this_cpu = get_cpu();
+
+        if (cpumask_test_cpu(this_cpu, mask))
+                msr_func(&rv);
+
+        smp_call_function_many(mask, msr_func, &rv, 1);
+        put_cpu();
+}
+
+/* rdmsr on a bunch of CPUs
+ *
+ * @mask:       which CPUs
+ * @msr_no:     which MSR
+ * @msrs:       array of MSR values
+ *
+ */
+void rdmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs)
+{
+        __rwmsr_on_cpus(mask, msr_no, msrs, __rdmsr_on_cpu);
+}
+EXPORT_SYMBOL(rdmsr_on_cpus);
+
+/*
+ * wrmsr on a bunch of CPUs
+ *
+ * @mask:       which CPUs
+ * @msr_no:     which MSR
+ * @msrs:       array of MSR values
+ *
+ */
+void wrmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs)
+{
+        __rwmsr_on_cpus(mask, msr_no, msrs, __wrmsr_on_cpu);
+}
+EXPORT_SYMBOL(wrmsr_on_cpus);
+
+/* These "safe" variants are slower and should be used when the target MSR
+   may not actually exist. */
+static void __rdmsr_safe_on_cpu(void *info)
+{
+        struct msr_info *rv = info;
+
+        rv->err = rdmsr_safe(rv->msr_no, &rv->reg.l, &rv->reg.h);
+}
+
+static void __wrmsr_safe_on_cpu(void *info)
+{
+        struct msr_info *rv = info;
+
+        rv->err = wrmsr_safe(rv->msr_no, rv->reg.l, rv->reg.h);
+}
+
+int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
+{
+        int err;
+        struct msr_info rv;
+
+        memset(&rv, 0, sizeof(rv));
+
+        rv.msr_no = msr_no;
+        err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1);
+        *l = rv.reg.l;
+        *h = rv.reg.h;
+
+        return err ? err : rv.err;
+}
+EXPORT_SYMBOL(rdmsr_safe_on_cpu);
+
+int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
+{
+        int err;
+        struct msr_info rv;
+
+        memset(&rv, 0, sizeof(rv));
+
+        rv.msr_no = msr_no;
+        rv.reg.l = l;
+        rv.reg.h = h;
+        err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1);
+
+        return err ? err : rv.err;
+}
+EXPORT_SYMBOL(wrmsr_safe_on_cpu);
+
+/*
+ * These variants are significantly slower, but allows control over
+ * the entire 32-bit GPR set.
+ */
+static void __rdmsr_safe_regs_on_cpu(void *info)
+{
+        struct msr_regs_info *rv = info;
+
+        rv->err = rdmsr_safe_regs(rv->regs);
+}
+
+static void __wrmsr_safe_regs_on_cpu(void *info)
+{
+        struct msr_regs_info *rv = info;
+
+        rv->err = wrmsr_safe_regs(rv->regs);
+}
+
+int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
+{
+        int err;
+        struct msr_regs_info rv;
+
+        rv.regs   = regs;
+        rv.err    = -EIO;
+        err = smp_call_function_single(cpu, __rdmsr_safe_regs_on_cpu, &rv, 1);
+
+        return err ? err : rv.err;
+}
+EXPORT_SYMBOL(rdmsr_safe_regs_on_cpu);
+
+int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
+{
+        int err;
+        struct msr_regs_info rv;
+
+        rv.regs = regs;
+        rv.err  = -EIO;
+        err = smp_call_function_single(cpu, __wrmsr_safe_regs_on_cpu, &rv, 1);
+
+        return err ? err : rv.err;
+}
+EXPORT_SYMBOL(wrmsr_safe_regs_on_cpu);
diff --git a/arch/x86/lib/msr.c b/arch/x86/lib/msr.c
index 872834177937..8f8eebdca7d4 100644
--- a/arch/x86/lib/msr.c
+++ b/arch/x86/lib/msr.c
@@ -1,123 +1,7 @@
 #include <linux/module.h>
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <asm/msr.h>
 
-struct msr_info {
-        u32 msr_no;
-        struct msr reg;
-        struct msr *msrs;
-        int err;
-};
-
-static void __rdmsr_on_cpu(void *info)
-{
-        struct msr_info *rv = info;
-        struct msr *reg;
-        int this_cpu = raw_smp_processor_id();
-
-        if (rv->msrs)
-                reg = per_cpu_ptr(rv->msrs, this_cpu);
-        else
-                reg = &rv->reg;
-
-        rdmsr(rv->msr_no, reg->l, reg->h);
-}
-
-static void __wrmsr_on_cpu(void *info)
-{
-        struct msr_info *rv = info;
-        struct msr *reg;
-        int this_cpu = raw_smp_processor_id();
-
-        if (rv->msrs)
-                reg = per_cpu_ptr(rv->msrs, this_cpu);
-        else
-                reg = &rv->reg;
-
-        wrmsr(rv->msr_no, reg->l, reg->h);
-}
-
-int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
-{
-        int err;
-        struct msr_info rv;
-
-        memset(&rv, 0, sizeof(rv));
-
-        rv.msr_no = msr_no;
-        err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1);
-        *l = rv.reg.l;
-        *h = rv.reg.h;
-
-        return err;
-}
-EXPORT_SYMBOL(rdmsr_on_cpu);
-
-int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
-{
-        int err;
-        struct msr_info rv;
-
-        memset(&rv, 0, sizeof(rv));
-
-        rv.msr_no = msr_no;
-        rv.reg.l = l;
-        rv.reg.h = h;
-        err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
-
-        return err;
-}
-EXPORT_SYMBOL(wrmsr_on_cpu);
-
-static void __rwmsr_on_cpus(const struct cpumask *mask, u32 msr_no,
-                            struct msr *msrs,
-                            void (*msr_func) (void *info))
-{
-        struct msr_info rv;
-        int this_cpu;
-
-        memset(&rv, 0, sizeof(rv));
-
-        rv.msrs   = msrs;
-        rv.msr_no = msr_no;
-
-        this_cpu = get_cpu();
-
-        if (cpumask_test_cpu(this_cpu, mask))
-                msr_func(&rv);
-
-        smp_call_function_many(mask, msr_func, &rv, 1);
-        put_cpu();
-}
-
-/* rdmsr on a bunch of CPUs
- *
- * @mask:       which CPUs
- * @msr_no:     which MSR
- * @msrs:       array of MSR values
- *
- */
-void rdmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs)
-{
-        __rwmsr_on_cpus(mask, msr_no, msrs, __rdmsr_on_cpu);
-}
-EXPORT_SYMBOL(rdmsr_on_cpus);
-
-/*
- * wrmsr on a bunch of CPUs
- *
- * @mask:       which CPUs
- * @msr_no:     which MSR
- * @msrs:       array of MSR values
- *
- */
-void wrmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs)
-{
-        __rwmsr_on_cpus(mask, msr_no, msrs, __wrmsr_on_cpu);
-}
-EXPORT_SYMBOL(wrmsr_on_cpus);
-
 struct msr *msrs_alloc(void)
 {
         struct msr *msrs = NULL;
@@ -137,100 +21,3 @@ void msrs_free(struct msr *msrs)
         free_percpu(msrs);
 }
 EXPORT_SYMBOL(msrs_free);
-
-/* These "safe" variants are slower and should be used when the target MSR
-   may not actually exist. */
-static void __rdmsr_safe_on_cpu(void *info)
-{
-        struct msr_info *rv = info;
-
-        rv->err = rdmsr_safe(rv->msr_no, &rv->reg.l, &rv->reg.h);
-}
-
-static void __wrmsr_safe_on_cpu(void *info)
-{
-        struct msr_info *rv = info;
-
-        rv->err = wrmsr_safe(rv->msr_no, rv->reg.l, rv->reg.h);
-}
-
-int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
-{
-        int err;
-        struct msr_info rv;
-
-        memset(&rv, 0, sizeof(rv));
-
-        rv.msr_no = msr_no;
-        err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1);
-        *l = rv.reg.l;
-        *h = rv.reg.h;
-
-        return err ? err : rv.err;
-}
-EXPORT_SYMBOL(rdmsr_safe_on_cpu);
-
-int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
-{
-        int err;
-        struct msr_info rv;
-
-        memset(&rv, 0, sizeof(rv));
-
-        rv.msr_no = msr_no;
-        rv.reg.l = l;
-        rv.reg.h = h;
-        err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1);
-
-        return err ? err : rv.err;
-}
-EXPORT_SYMBOL(wrmsr_safe_on_cpu);
-
-/*
- * These variants are significantly slower, but allows control over
- * the entire 32-bit GPR set.
- */
-struct msr_regs_info {
-        u32 *regs;
-        int err;
-};
-
-static void __rdmsr_safe_regs_on_cpu(void *info)
-{
-        struct msr_regs_info *rv = info;
-
-        rv->err = rdmsr_safe_regs(rv->regs);
-}
-
-static void __wrmsr_safe_regs_on_cpu(void *info)
-{
-        struct msr_regs_info *rv = info;
-
-        rv->err = wrmsr_safe_regs(rv->regs);
-}
-
-int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
-{
-        int err;
-        struct msr_regs_info rv;
-
-        rv.regs   = regs;
-        rv.err    = -EIO;
-        err = smp_call_function_single(cpu, __rdmsr_safe_regs_on_cpu, &rv, 1);
-
-        return err ? err : rv.err;
-}
-EXPORT_SYMBOL(rdmsr_safe_regs_on_cpu);
-
-int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
-{
-        int err;
-        struct msr_regs_info rv;
-
-        rv.regs = regs;
-        rv.err  = -EIO;
-        err = smp_call_function_single(cpu, __wrmsr_safe_regs_on_cpu, &rv, 1);
-
-        return err ? err : rv.err;
-}
-EXPORT_SYMBOL(wrmsr_safe_regs_on_cpu);
diff --git a/arch/x86/mm/srat_32.c b/arch/x86/mm/srat_32.c
index 6f8aa33031c7..9324f13492d5 100644
--- a/arch/x86/mm/srat_32.c
+++ b/arch/x86/mm/srat_32.c
@@ -267,6 +267,8 @@ int __init get_memcfg_from_srat(void)
                 e820_register_active_regions(chunk->nid, chunk->start_pfn,
                                              min(chunk->end_pfn, max_pfn));
         }
+        /* for out of order entries in SRAT */
+        sort_node_map();
 
         for_each_online_node(nid) {
                 unsigned long start = node_start_pfn[nid];
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index d89075489664..a27124185fc1 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -317,7 +317,7 @@ static int __init nodes_cover_memory(const struct bootnode *nodes)
                 unsigned long s = nodes[i].start >> PAGE_SHIFT;
                 unsigned long e = nodes[i].end >> PAGE_SHIFT;
                 pxmram += e - s;
-                pxmram -= absent_pages_in_range(s, e);
+                pxmram -= __absent_pages_in_range(i, s, e);
                 if ((long)pxmram < 0)
                         pxmram = 0;
         }
@@ -373,6 +373,8 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
         for_each_node_mask(i, nodes_parsed)
                 e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
                                                 nodes[i].end >> PAGE_SHIFT);
+        /* for out of order entries in SRAT */
+        sort_node_map();
         if (!nodes_cover_memory(nodes)) {
                 bad_srat();
                 return -1;
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index 044897be021f..3855096c59b8 100644
--- a/arch/x86/oprofile/backtrace.c
+++ b/arch/x86/oprofile/backtrace.c
@@ -41,10 +41,11 @@ static void backtrace_address(void *data, unsigned long addr, int reliable)
 }
 
 static struct stacktrace_ops backtrace_ops = {
-        .warning = backtrace_warning,
-        .warning_symbol = backtrace_warning_symbol,
-        .stack = backtrace_stack,
-        .address = backtrace_address,
+        .warning        = backtrace_warning,
+        .warning_symbol = backtrace_warning_symbol,
+        .stack          = backtrace_stack,
+        .address        = backtrace_address,
+        .walk_stack     = print_context_stack,
 };
 
 struct frame_head {
diff --git a/arch/x86/tools/chkobjdump.awk b/arch/x86/tools/chkobjdump.awk
index 0d13cd9fdcff..5bbb5a33f220 100644
--- a/arch/x86/tools/chkobjdump.awk
+++ b/arch/x86/tools/chkobjdump.awk
@@ -9,7 +9,7 @@ BEGIN {
 }
 
 /^GNU/ {
-        split($4, ver, ".");
+        split($3, ver, ".");
         if (ver[1] > od_ver ||
             (ver[1] == od_ver && ver[2] >= od_sver)) {
                 exit 1;
diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index 7a6850683c34..eaf11f52fc0b 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -6,8 +6,6 @@
 
 # Awk implementation sanity check
 function check_awk_implement() {
-        if (!match("abc", "[[:lower:]]+"))
-                return "Your awk doesn't support charactor-class."
         if (sprintf("%x", 0) != "0")
                 return "Your awk has a printf-format problem."
         return ""
@@ -44,12 +42,12 @@ BEGIN {
         delete gtable
         delete atable
 
-        opnd_expr = "^[[:alpha:]/]"
+        opnd_expr = "^[A-Za-z/]"
         ext_expr = "^\\("
         sep_expr = "^\\|$"
-        group_expr = "^Grp[[:alnum:]]+"
+        group_expr = "^Grp[0-9A-Za-z]+"
 
-        imm_expr = "^[IJAO][[:lower:]]"
+        imm_expr = "^[IJAO][a-z]"
         imm_flag["Ib"] = "INAT_MAKE_IMM(INAT_IMM_BYTE)"
         imm_flag["Jb"] = "INAT_MAKE_IMM(INAT_IMM_BYTE)"
         imm_flag["Iw"] = "INAT_MAKE_IMM(INAT_IMM_WORD)"
@@ -62,7 +60,7 @@ BEGIN {
         imm_flag["Ob"] = "INAT_MOFFSET"
         imm_flag["Ov"] = "INAT_MOFFSET"
 
-        modrm_expr = "^([CDEGMNPQRSUVW/][[:lower:]]+|NTA|T[012])"
+        modrm_expr = "^([CDEGMNPQRSUVW/][a-z]+|NTA|T[012])"
         force64_expr = "\\([df]64\\)"
         rex_expr = "^REX(\\.[XRWB]+)*"
         fpu_expr = "^ESC" # TODO