9 files changed, 36 insertions, 74 deletions

diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c
index e04173c7e621..d59a0cd537f0 100644
--- a/arch/arm/kernel/sys_oabi-compat.c
+++ b/arch/arm/kernel/sys_oabi-compat.c
@@ -177,21 +177,12 @@ asmlinkage long sys_oabi_fstatat64(int dfd,
                                    int flag)
 {
         struct kstat stat;
-        int error = -EINVAL;
+        int error;
 
-        if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
-                goto out;
-
-        if (flag & AT_SYMLINK_NOFOLLOW)
-                error = vfs_lstat_fd(dfd, filename, &stat);
-        else
-                error = vfs_stat_fd(dfd, filename, &stat);
-
-        if (!error)
-        error = cp_oldabi_stat64(&stat, statbuf);
-
-out:
-        return error;
+        error = vfs_fstatat(dfd, filename, &stat, flag);
+        if (error)
+                return error;
+        return cp_oldabi_stat64(&stat, statbuf);
 }
 
 struct oabi_flock64 {
diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index 0669e1382383..55e4fab7c0bc 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -46,7 +46,6 @@
 #include <asm/io.h>
 
 #ifdef CONFIG_BLK_DEV_INITRD
-#include <linux/blk.h>
 #include <asm/pgtable.h>
 #endif
 
diff --git a/arch/ia64/include/asm/paravirt_privop.h b/arch/ia64/include/asm/paravirt_privop.h
index 3d2951130b5f..8f6cb11c9fae 100644
--- a/arch/ia64/include/asm/paravirt_privop.h
+++ b/arch/ia64/include/asm/paravirt_privop.h
@@ -445,7 +445,6 @@ paravirt_set_rr0_to_rr4(unsigned long val0, unsigned long val1,
                 register unsigned long ia64_intri_res asm ("r8");       \
                 register unsigned long __reg asm ("r8") = (reg);        \
                                                                         \
-                BUILD_BUG_ON(!__builtin_constant_p(reg));               \
                 asm volatile (paravirt_alt_bundle(__PARAVIRT_BR,        \
                                                   PARAVIRT_TYPE(GETREG) \
                                                   + (reg))              \
@@ -464,7 +463,6 @@ paravirt_set_rr0_to_rr4(unsigned long val0, unsigned long val1,
                 register unsigned long ia64_clobber1 asm ("r8");        \
                 register unsigned long ia64_clobber2 asm ("r9");        \
                                                                         \
-                BUILD_BUG_ON(!__builtin_constant_p(reg));               \
                 asm volatile (paravirt_alt_bundle(__PARAVIRT_BR,        \
                                                   PARAVIRT_TYPE(SETREG) \
                                                   + (reg))              \
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 2ea4199d9c57..5230eaafd83f 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -225,6 +225,7 @@ smp_send_reschedule (int cpu)
 {
         platform_send_ipi(cpu, IA64_IPI_RESCHEDULE, IA64_IPI_DM_INT, 0);
 }
+EXPORT_SYMBOL_GPL(smp_send_reschedule);
 
 /*
  * Called with preemption disabled.
@@ -300,15 +301,12 @@ smp_flush_tlb_mm (struct mm_struct *mm)
                 return;
         }
 
+        smp_call_function_mask(mm->cpu_vm_mask,
+                (void (*)(void *))local_finish_flush_tlb_mm, mm, 1);
+        local_irq_disable();
+        local_finish_flush_tlb_mm(mm);
+        local_irq_enable();
         preempt_enable();
-        /*
-         * We could optimize this further by using mm->cpu_vm_mask to track which CPUs
-         * have been running in the address space.  It's not clear that this is worth the
-         * trouble though: to avoid races, we have to raise the IPI on the target CPU
-         * anyhow, and once a CPU is interrupted, the cost of local_flush_tlb_all() is
-         * rather trivial.
-         */
-        on_each_cpu((void (*)(void *))local_finish_flush_tlb_mm, mm, 1);
 }
 
 void arch_send_call_function_single_ipi(int cpu)
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 6cc87d8c8682..002c70d3cb75 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -702,20 +702,12 @@ asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename,
                                 struct stat64_emu31 __user* statbuf, int flag)
 {
         struct kstat stat;
-        int error = -EINVAL;
-
-        if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
-                goto out;
-
-        if (flag & AT_SYMLINK_NOFOLLOW)
-                error = vfs_lstat_fd(dfd, filename, &stat);
-        else
-                error = vfs_stat_fd(dfd, filename, &stat);
+        int error;
 
-        if (!error)
-                error = cp_stat64(statbuf, &stat);
-out:
-        return error;
+        error = vfs_fstatat(dfd, filename, &stat, flag);
+        if (error)
+                return error;
+        return cp_stat64(statbuf, &stat);
 }
 
 /*
diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c
index e800503879e4..f5000a460c05 100644
--- a/arch/sparc/kernel/sys_sparc32.c
+++ b/arch/sparc/kernel/sys_sparc32.c
@@ -206,21 +206,12 @@ asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
                 struct compat_stat64 __user * statbuf, int flag)
 {
         struct kstat stat;
-        int error = -EINVAL;
-
-        if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
-                goto out;
-
-        if (flag & AT_SYMLINK_NOFOLLOW)
-                error = vfs_lstat_fd(dfd, filename, &stat);
-        else
-                error = vfs_stat_fd(dfd, filename, &stat);
-
-        if (!error)
-                error = cp_compat_stat64(&stat, statbuf);
+        int error;
 
-out:
-        return error;
+        error = vfs_fstatat(dfd, filename, &stat, flag);
+        if (error)
+                return error;
+        return cp_compat_stat64(&stat, statbuf);
 }
 
 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index efac92fd1efb..085a8c35f149 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -129,21 +129,12 @@ asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename,
                               struct stat64 __user *statbuf, int flag)
 {
         struct kstat stat;
-        int error = -EINVAL;
+        int error;
 
-        if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
-                goto out;
-
-        if (flag & AT_SYMLINK_NOFOLLOW)
-                error = vfs_lstat_fd(dfd, filename, &stat);
-        else
-                error = vfs_stat_fd(dfd, filename, &stat);
-
-        if (!error)
-                error = cp_stat64(statbuf, &stat);
-
-out:
-        return error;
+        error = vfs_fstatat(dfd, filename, &stat, flag);
+        if (error)
+                return error;
+        return cp_stat64(statbuf, &stat);
 }
 
 /*
diff --git a/arch/x86/include/asm/lguest_hcall.h b/arch/x86/include/asm/lguest_hcall.h
index 0f4ee7148afe..faae1996487b 100644
--- a/arch/x86/include/asm/lguest_hcall.h
+++ b/arch/x86/include/asm/lguest_hcall.h
@@ -5,7 +5,6 @@
 #define LHCALL_FLUSH_ASYNC      0
 #define LHCALL_LGUEST_INIT      1
 #define LHCALL_SHUTDOWN         2
-#define LHCALL_LOAD_GDT         3
 #define LHCALL_NEW_PGTABLE      4
 #define LHCALL_FLUSH_TLB        5
 #define LHCALL_LOAD_IDT_ENTRY   6
@@ -17,6 +16,7 @@
 #define LHCALL_SET_PMD          15
 #define LHCALL_LOAD_TLS         16
 #define LHCALL_NOTIFY           17
+#define LHCALL_LOAD_GDT_ENTRY   18
 
 #define LGUEST_TRAP_ENTRY 0x1F
 
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index e94a11e42f98..a2085368a3dc 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -273,15 +273,15 @@ static void lguest_load_idt(const struct desc_ptr *desc)
  * controls the entire thing and the Guest asks it to make changes using the
  * LOAD_GDT hypercall.
  *
- * This is the opposite of the IDT code where we have a LOAD_IDT_ENTRY
- * hypercall and use that repeatedly to load a new IDT.  I don't think it
- * really matters, but wouldn't it be nice if they were the same?  Wouldn't
- * it be even better if you were the one to send the patch to fix it?
+ * This is the exactly like the IDT code.
  */
 static void lguest_load_gdt(const struct desc_ptr *desc)
 {
-        BUG_ON((desc->size + 1) / 8 != GDT_ENTRIES);
-        kvm_hypercall2(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES);
+        unsigned int i;
+        struct desc_struct *gdt = (void *)desc->address;
+
+        for (i = 0; i < (desc->size+1)/8; i++)
+                kvm_hypercall3(LHCALL_LOAD_GDT_ENTRY, i, gdt[i].a, gdt[i].b);
 }
 
 /* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
@@ -291,7 +291,9 @@ static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
                                    const void *desc, int type)
 {
         native_write_gdt_entry(dt, entrynum, desc, type);
-        kvm_hypercall2(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES);
+        /* Tell Host about this new entry. */
+        kvm_hypercall3(LHCALL_LOAD_GDT_ENTRY, entrynum,
+                       dt[entrynum].a, dt[entrynum].b);
 }
 
 /* OK, I lied.  There are three "thread local storage" GDT entries which change