Merge branch 'linus' into core/iommu

Conflicts:
	arch/ia64/include/asm/dma-mapping.h
	arch/ia64/include/asm/machvec.h
	arch/ia64/include/asm/machvec_sn2.h

13 files changed, 76 insertions, 51 deletions

diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild
index a9f8a814a1f7..4a8e80cdcfa5 100644
--- a/arch/x86/include/asm/Kbuild
+++ b/arch/x86/include/asm/Kbuild
@@ -22,4 +22,3 @@ unifdef-y += unistd_32.h
 unifdef-y += unistd_64.h
 unifdef-y += vm86.h
 unifdef-y += vsyscall.h
-unifdef-y += swab.h
diff --git a/arch/x86/include/asm/byteorder.h b/arch/x86/include/asm/byteorder.h
index 7c49917e3d9d..b13a7a88f3eb 100644
--- a/arch/x86/include/asm/byteorder.h
+++ b/arch/x86/include/asm/byteorder.h
@@ -1,7 +1,6 @@
 #ifndef _ASM_X86_BYTEORDER_H
 #define _ASM_X86_BYTEORDER_H
 
-#include <asm/swab.h>
 #include <linux/byteorder/little_endian.h>
 
 #endif /* _ASM_X86_BYTEORDER_H */
diff --git a/arch/x86/include/asm/mach-default/mach_wakecpu.h b/arch/x86/include/asm/mach-default/mach_wakecpu.h
index ceb013660146..89897a6a65b9 100644
--- a/arch/x86/include/asm/mach-default/mach_wakecpu.h
+++ b/arch/x86/include/asm/mach-default/mach_wakecpu.h
@@ -24,7 +24,13 @@ static inline void restore_NMI_vector(unsigned short *high, unsigned short *low)
 {
 }
 
+#ifdef CONFIG_SMP
 extern void __inquire_remote_apic(int apicid);
+#else /* CONFIG_SMP */
+static inline void __inquire_remote_apic(int apicid)
+{
+}
+#endif /* CONFIG_SMP */
 
 static inline void inquire_remote_apic(int apicid)
 {
diff --git a/arch/x86/include/asm/mtrr.h b/arch/x86/include/asm/mtrr.h
index cb988aab716d..14080d22edb3 100644
--- a/arch/x86/include/asm/mtrr.h
+++ b/arch/x86/include/asm/mtrr.h
@@ -58,15 +58,15 @@ struct mtrr_gentry {
 #endif /* !__i386__ */
 
 struct mtrr_var_range {
-        u32 base_lo;
-        u32 base_hi;
-        u32 mask_lo;
-        u32 mask_hi;
+        __u32 base_lo;
+        __u32 base_hi;
+        __u32 mask_lo;
+        __u32 mask_hi;
 };
 
 /* In the Intel processor's MTRR interface, the MTRR type is always held in
    an 8 bit field: */
-typedef u8 mtrr_type;
+typedef __u8 mtrr_type;
 
 #define MTRR_NUM_FIXED_RANGES 88
 #define MTRR_MAX_VAR_RANGES 256
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 83e69f4a37f0..06bbcbd66e9c 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -341,6 +341,25 @@ static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
 
 #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask)
 
+static inline int is_new_memtype_allowed(unsigned long flags,
+                                                unsigned long new_flags)
+{
+        /*
+         * Certain new memtypes are not allowed with certain
+         * requested memtype:
+         * - request is uncached, return cannot be write-back
+         * - request is write-combine, return cannot be write-back
+         */
+        if ((flags == _PAGE_CACHE_UC_MINUS &&
+             new_flags == _PAGE_CACHE_WB) ||
+            (flags == _PAGE_CACHE_WC &&
+             new_flags == _PAGE_CACHE_WB)) {
+                return 0;
+        }
+
+        return 1;
+}
+
 #ifndef __ASSEMBLY__
 /* Indicate that x86 has its own track and untrack pfn vma functions */
 #define __HAVE_PFNMAP_TRACKING
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 566a08466b19..0f830e4f5675 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -47,6 +47,7 @@
 #include <asm/proto.h>
 #include <asm/apic.h>
 #include <asm/i8259.h>
+#include <asm/smp.h>
 
 #include <mach_apic.h>
 #include <mach_apicdef.h>
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 06fcd8f9323c..6f11e029e8c5 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -150,9 +150,8 @@ struct drv_cmd {
         u32 val;
 };
 
-static long do_drv_read(void *_cmd)
+static void do_drv_read(struct drv_cmd *cmd)
 {
-        struct drv_cmd *cmd = _cmd;
         u32 h;
 
         switch (cmd->type) {
@@ -167,12 +166,10 @@ static long do_drv_read(void *_cmd)
         default:
                 break;
         }
-        return 0;
 }
 
-static long do_drv_write(void *_cmd)
+static void do_drv_write(struct drv_cmd *cmd)
 {
-        struct drv_cmd *cmd = _cmd;
         u32 lo, hi;
 
         switch (cmd->type) {
@@ -189,23 +186,30 @@ static long do_drv_write(void *_cmd)
         default:
                 break;
         }
-        return 0;
 }
 
 static void drv_read(struct drv_cmd *cmd)
 {
+        cpumask_t saved_mask = current->cpus_allowed;
         cmd->val = 0;
 
-        work_on_cpu(cpumask_any(cmd->mask), do_drv_read, cmd);
+        set_cpus_allowed_ptr(current, cmd->mask);
+        do_drv_read(cmd);
+        set_cpus_allowed_ptr(current, &saved_mask);
 }
 
 static void drv_write(struct drv_cmd *cmd)
 {
+        cpumask_t saved_mask = current->cpus_allowed;
         unsigned int i;
 
         for_each_cpu(i, cmd->mask) {
-                work_on_cpu(i, do_drv_write, cmd);
+                set_cpus_allowed_ptr(current, cpumask_of(i));
+                do_drv_write(cmd);
         }
+
+        set_cpus_allowed_ptr(current, &saved_mask);
+        return;
 }
 
 static u32 get_cur_val(const struct cpumask *mask)
@@ -231,15 +235,10 @@ static u32 get_cur_val(const struct cpumask *mask)
                 return 0;
         }
 
-        if (unlikely(!alloc_cpumask_var(&cmd.mask, GFP_KERNEL)))
-                return 0;
-
         cpumask_copy(cmd.mask, mask);
 
         drv_read(&cmd);
 
-        free_cpumask_var(cmd.mask);
-
         dprintk("get_cur_val = %u\n", cmd.val);
 
         return cmd.val;
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index d6f0490a7391..46469029e9d3 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1203,7 +1203,6 @@ nmi_stack_correct:
         pushl %eax
         CFI_ADJUST_CFA_OFFSET 4
         SAVE_ALL
-        TRACE_IRQS_OFF
         xorl %edx,%edx          # zero error code
         movl %esp,%eax          # pt_regs pointer
         call do_nmi
@@ -1244,7 +1243,6 @@ nmi_espfix_stack:
         pushl %eax
         CFI_ADJUST_CFA_OFFSET 4
         SAVE_ALL
-        TRACE_IRQS_OFF
         FIXUP_ESPFIX_STACK              # %eax == %esp
         xorl %edx,%edx                  # zero error code
         call do_nmi
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index c0601c2848a1..a649a4ccad43 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -27,6 +27,7 @@
 #include <asm/e820.h>
 #include <asm/trampoline.h>
 #include <asm/setup.h>
+#include <asm/smp.h>
 
 #include <mach_apic.h>
 #ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/syscall_table_32.S b/arch/x86/kernel/syscall_table_32.S
index d44395ff34c3..e2e86a08f31d 100644
--- a/arch/x86/kernel/syscall_table_32.S
+++ b/arch/x86/kernel/syscall_table_32.S
@@ -88,7 +88,7 @@ ENTRY(sys_call_table)
         .long sys_uselib
         .long sys_swapon
         .long sys_reboot
-        .long old_readdir
+        .long sys_old_readdir
         .long old_mmap          /* 90 */
         .long sys_munmap
         .long sys_truncate
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 9e268b6b204e..90dfae511a41 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -534,7 +534,7 @@ static int vmalloc_fault(unsigned long address)
            happen within a race in page table update. In the later
            case just flush. */
 
-        pgd = pgd_offset(current->mm ?: &init_mm, address);
+        pgd = pgd_offset(current->active_mm, address);
         pgd_ref = pgd_offset_k(address);
         if (pgd_none(*pgd_ref))
                 return -1;
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 85cbd3cd3723..8b08fb955274 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -601,12 +601,13 @@ void unmap_devmem(unsigned long pfn, unsigned long size, pgprot_t vma_prot)
  * Reserved non RAM regions only and after successful reserve_memtype,
  * this func also keeps identity mapping (if any) in sync with this new prot.
  */
-static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t vma_prot)
+static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot,
+                                int strict_prot)
 {
         int is_ram = 0;
         int id_sz, ret;
         unsigned long flags;
-        unsigned long want_flags = (pgprot_val(vma_prot) & _PAGE_CACHE_MASK);
+        unsigned long want_flags = (pgprot_val(*vma_prot) & _PAGE_CACHE_MASK);
 
         is_ram = pagerange_is_ram(paddr, paddr + size);
 
@@ -625,15 +626,24 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t vma_prot)
                 return ret;
 
         if (flags != want_flags) {
-                free_memtype(paddr, paddr + size);
-                printk(KERN_ERR
-                "%s:%d map pfn expected mapping type %s for %Lx-%Lx, got %s\n",
-                        current->comm, current->pid,
-                        cattr_name(want_flags),
-                        (unsigned long long)paddr,
-                        (unsigned long long)(paddr + size),
-                        cattr_name(flags));
-                return -EINVAL;
+                if (strict_prot || !is_new_memtype_allowed(want_flags, flags)) {
+                        free_memtype(paddr, paddr + size);
+                        printk(KERN_ERR "%s:%d map pfn expected mapping type %s"
+                                " for %Lx-%Lx, got %s\n",
+                                current->comm, current->pid,
+                                cattr_name(want_flags),
+                                (unsigned long long)paddr,
+                                (unsigned long long)(paddr + size),
+                                cattr_name(flags));
+                        return -EINVAL;
+                }
+                /*
+                 * We allow returning different type than the one requested in
+                 * non strict case.
+                 */
+                *vma_prot = __pgprot((pgprot_val(*vma_prot) &
+                                      (~_PAGE_CACHE_MASK)) |
+                                     flags);
         }
 
         /* Need to keep identity mapping in sync */
@@ -689,6 +699,7 @@ int track_pfn_vma_copy(struct vm_area_struct *vma)
         unsigned long vma_start = vma->vm_start;
         unsigned long vma_end = vma->vm_end;
         unsigned long vma_size = vma_end - vma_start;
+        pgprot_t pgprot;
 
         if (!pat_enabled)
                 return 0;
@@ -702,7 +713,8 @@ int track_pfn_vma_copy(struct vm_area_struct *vma)
                         WARN_ON_ONCE(1);
                         return -EINVAL;
                 }
-                return reserve_pfn_range(paddr, vma_size, __pgprot(prot));
+                pgprot = __pgprot(prot);
+                return reserve_pfn_range(paddr, vma_size, &pgprot, 1);
         }
 
         /* reserve entire vma page by page, using pfn and prot from pte */
@@ -710,7 +722,8 @@ int track_pfn_vma_copy(struct vm_area_struct *vma)
                 if (follow_phys(vma, vma_start + i, 0, &prot, &paddr))
                         continue;
 
-                retval = reserve_pfn_range(paddr, PAGE_SIZE, __pgprot(prot));
+                pgprot = __pgprot(prot);
+                retval = reserve_pfn_range(paddr, PAGE_SIZE, &pgprot, 1);
                 if (retval)
                         goto cleanup_ret;
         }
@@ -741,7 +754,7 @@ cleanup_ret:
  * Note that this function can be called with caller trying to map only a
  * subrange/page inside the vma.
  */
-int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t prot,
+int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t *prot,
                         unsigned long pfn, unsigned long size)
 {
         int retval = 0;
@@ -758,14 +771,14 @@ int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t prot,
         if (is_linear_pfn_mapping(vma)) {
                 /* reserve the whole chunk starting from vm_pgoff */
                 paddr = (resource_size_t)vma->vm_pgoff << PAGE_SHIFT;
-                return reserve_pfn_range(paddr, vma_size, prot);
+                return reserve_pfn_range(paddr, vma_size, prot, 0);
         }
 
         /* reserve page by page using pfn and size */
         base_paddr = (resource_size_t)pfn << PAGE_SHIFT;
         for (i = 0; i < size; i += PAGE_SIZE) {
                 paddr = base_paddr + i;
-                retval = reserve_pfn_range(paddr, PAGE_SIZE, prot);
+                retval = reserve_pfn_range(paddr, PAGE_SIZE, prot, 0);
                 if (retval)
                         goto cleanup_ret;
         }
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index f884740da318..5ead808dd70c 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -314,17 +314,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
                 return retval;
 
         if (flags != new_flags) {
-                /*
-                 * Do not fallback to certain memory types with certain
-                 * requested type:
-                 * - request is uncached, return cannot be write-back
-                 * - request is uncached, return cannot be write-combine
-                 * - request is write-combine, return cannot be write-back
-                 */
-                if ((flags == _PAGE_CACHE_UC_MINUS &&
-                     (new_flags == _PAGE_CACHE_WB)) ||
-                    (flags == _PAGE_CACHE_WC &&
-                     new_flags == _PAGE_CACHE_WB)) {
+                if (!is_new_memtype_allowed(flags, new_flags)) {
                         free_memtype(addr, addr+len);
                         return -EINVAL;
                 }