diff --git a/arch/i386/kernel/alternative.c b/arch/i386/kernel/alternative.c
index 9f4ac8b..bd72d94 100644
--- a/arch/i386/kernel/alternative.c
+++ b/arch/i386/kernel/alternative.c
@@ -445,8 +445,6 @@
 {
 	memcpy(addr, opcode, len);
 	sync_core();
-	/* Not strictly needed, but can speed CPU recovery up. Ignore cross cacheline
-	   case. */
-	if (cpu_has_clflush)
-		asm("clflush (%0) " :: "r" (addr) : "memory");
+	/* Could also do a CLFLUSH here to speed up CPU recovery; but
+	   that causes hangs on some VIA CPUs. */
 }
diff --git a/arch/i386/kernel/cpu/perfctr-watchdog.c b/arch/i386/kernel/cpu/perfctr-watchdog.c
index 4be488e..93fecd4 100644
--- a/arch/i386/kernel/cpu/perfctr-watchdog.c
+++ b/arch/i386/kernel/cpu/perfctr-watchdog.c
@@ -263,8 +263,8 @@
 	unsigned int evntsel;
 	struct nmi_watchdog_ctlblk *wd = &__get_cpu_var(nmi_watchdog_ctlblk);
 
-	perfctr_msr = MSR_K7_PERFCTR0;
-	evntsel_msr = MSR_K7_EVNTSEL0;
+	perfctr_msr = wd_ops->perfctr;
+	evntsel_msr = wd_ops->evntsel;
 
 	wrmsrl(perfctr_msr, 0UL);
 
@@ -343,8 +343,8 @@
 	unsigned int evntsel;
 	struct nmi_watchdog_ctlblk *wd = &__get_cpu_var(nmi_watchdog_ctlblk);
 
-	perfctr_msr = MSR_P6_PERFCTR0;
-	evntsel_msr = MSR_P6_EVNTSEL0;
+	perfctr_msr = wd_ops->perfctr;
+	evntsel_msr = wd_ops->evntsel;
 
 	/* KVM doesn't implement this MSR */
 	if (wrmsr_safe(perfctr_msr, 0, 0) < 0)
@@ -569,8 +569,8 @@
 	    (ebx & ARCH_PERFMON_UNHALTED_CORE_CYCLES_PRESENT))
 		return 0;
 
-	perfctr_msr = MSR_ARCH_PERFMON_PERFCTR1;
-	evntsel_msr = MSR_ARCH_PERFMON_EVENTSEL1;
+	perfctr_msr = wd_ops->perfctr;
+	evntsel_msr = wd_ops->evntsel;
 
 	wrmsrl(perfctr_msr, 0UL);
 
@@ -605,6 +605,16 @@
 	.evntsel = MSR_ARCH_PERFMON_EVENTSEL1,
 };
 
+static struct wd_ops coreduo_wd_ops = {
+	.reserve = single_msr_reserve,
+	.unreserve = single_msr_unreserve,
+	.setup = setup_intel_arch_watchdog,
+	.rearm = p6_rearm,
+	.stop = single_msr_stop_watchdog,
+	.perfctr = MSR_ARCH_PERFMON_PERFCTR0,
+	.evntsel = MSR_ARCH_PERFMON_EVENTSEL0,
+};
+
 static void probe_nmi_watchdog(void)
 {
 	switch (boot_cpu_data.x86_vendor) {
@@ -615,6 +625,12 @@
 		wd_ops = &k7_wd_ops;
 		break;
 	case X86_VENDOR_INTEL:
+		/* Work around Core Duo (Yonah) errata AE49 where perfctr1
+		   doesn't have a working enable bit. */
+		if (boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 14) {
+			wd_ops = &coreduo_wd_ops;
+			break;
+		}
 		if (cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
 			wd_ops = &intel_arch_wd_ops;
 			break;
diff --git a/arch/i386/kernel/nmi.c b/arch/i386/kernel/nmi.c
index 8c1c965..c7227e2 100644
--- a/arch/i386/kernel/nmi.c
+++ b/arch/i386/kernel/nmi.c
@@ -115,12 +115,12 @@
 			atomic_dec(&nmi_active);
 		}
 	}
+	endflag = 1;
 	if (!atomic_read(&nmi_active)) {
 		kfree(prev_nmi_count);
 		atomic_set(&nmi_active, -1);
 		return -1;
 	}
-	endflag = 1;
 	printk("OK.\n");
 
 	/* now that we know it works we can reduce NMI frequency to
diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index 0c8f00e..7c1b925 100644
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -274,7 +274,6 @@
 void ptrace_disable(struct task_struct *child)
 { 
 	clear_singlestep(child);
-	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 	clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
 }
 
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 122444a..2e96f17 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -1577,7 +1577,6 @@
 
 	      case PTRACE_DETACH:
 		/* detach a process that was attached. */
-		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		ret = ptrace_detach(child, data);
 		goto out_tsk;
 
diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index 2cf0690..e792d3c 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -116,7 +116,6 @@
 void ptrace_disable(struct task_struct *child)
 {
 	singlestep_disable(child);
-	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 }
 
 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 0eb464a..7011d62a 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -566,13 +566,23 @@
 	case FSID_DEV:
 	case FSID_ENCODE_DEV:
 	case FSID_MAJOR_MINOR:
-		return FSIDSOURCE_DEV;
+		if (fhp->fh_export->ex_dentry->d_inode->i_sb->s_type->fs_flags
+		    & FS_REQUIRES_DEV)
+			return FSIDSOURCE_DEV;
+		break;
 	case FSID_NUM:
-		return FSIDSOURCE_FSID;
-	default:
 		if (fhp->fh_export->ex_flags & NFSEXP_FSID)
 			return FSIDSOURCE_FSID;
-		else
-			return FSIDSOURCE_UUID;
+		break;
+	default:
+		break;
 	}
+	/* either a UUID type filehandle, or the filehandle doesn't
+	 * match the export.
+	 */
+	if (fhp->fh_export->ex_flags & NFSEXP_FSID)
+		return FSIDSOURCE_FSID;
+	if (fhp->fh_export->ex_uuid)
+		return FSIDSOURCE_UUID;
+	return FSIDSOURCE_DEV;
 }
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index a0c2b25..7867151 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -115,7 +115,8 @@
 
 	exp2 = rqst_exp_get_by_name(rqstp, mnt, mounts);
 	if (IS_ERR(exp2)) {
-		err = PTR_ERR(exp2);
+		if (PTR_ERR(exp2) != -ENOENT)
+			err = PTR_ERR(exp2);
 		dput(mounts);
 		mntput(mnt);
 		goto out;
diff --git a/include/asm-um/elf-x86_64.h b/include/asm-um/elf-x86_64.h
index bfe27aa..857471c 100644
--- a/include/asm-um/elf-x86_64.h
+++ b/include/asm-um/elf-x86_64.h
@@ -67,27 +67,27 @@
 } while (0)
 
 #define ELF_CORE_COPY_REGS(pr_reg, regs)		\
-	(pr_reg)[0] = (regs)->regs.gp[0];			\
-	(pr_reg)[1] = (regs)->regs.gp[1];			\
-	(pr_reg)[2] = (regs)->regs.gp[2];			\
-	(pr_reg)[3] = (regs)->regs.gp[3];			\
-	(pr_reg)[4] = (regs)->regs.gp[4];			\
-	(pr_reg)[5] = (regs)->regs.gp[5];			\
-	(pr_reg)[6] = (regs)->regs.gp[6];			\
-	(pr_reg)[7] = (regs)->regs.gp[7];			\
-	(pr_reg)[8] = (regs)->regs.gp[8];			\
-	(pr_reg)[9] = (regs)->regs.gp[9];			\
-	(pr_reg)[10] = (regs)->regs.gp[10];			\
-	(pr_reg)[11] = (regs)->regs.gp[11];			\
-	(pr_reg)[12] = (regs)->regs.gp[12];			\
-	(pr_reg)[13] = (regs)->regs.gp[13];			\
-	(pr_reg)[14] = (regs)->regs.gp[14];			\
-	(pr_reg)[15] = (regs)->regs.gp[15];			\
-	(pr_reg)[16] = (regs)->regs.gp[16];			\
-	(pr_reg)[17] = (regs)->regs.gp[17];			\
-	(pr_reg)[18] = (regs)->regs.gp[18];			\
-	(pr_reg)[19] = (regs)->regs.gp[19];			\
-	(pr_reg)[20] = (regs)->regs.gp[20];			\
+	(pr_reg)[0] = (regs)->regs.skas.regs[0];			\
+	(pr_reg)[1] = (regs)->regs.skas.regs[1];			\
+	(pr_reg)[2] = (regs)->regs.skas.regs[2];			\
+	(pr_reg)[3] = (regs)->regs.skas.regs[3];			\
+	(pr_reg)[4] = (regs)->regs.skas.regs[4];			\
+	(pr_reg)[5] = (regs)->regs.skas.regs[5];			\
+	(pr_reg)[6] = (regs)->regs.skas.regs[6];			\
+	(pr_reg)[7] = (regs)->regs.skas.regs[7];			\
+	(pr_reg)[8] = (regs)->regs.skas.regs[8];			\
+	(pr_reg)[9] = (regs)->regs.skas.regs[9];			\
+	(pr_reg)[10] = (regs)->regs.skas.regs[10];			\
+	(pr_reg)[11] = (regs)->regs.skas.regs[11];			\
+	(pr_reg)[12] = (regs)->regs.skas.regs[12];			\
+	(pr_reg)[13] = (regs)->regs.skas.regs[13];			\
+	(pr_reg)[14] = (regs)->regs.skas.regs[14];			\
+	(pr_reg)[15] = (regs)->regs.skas.regs[15];			\
+	(pr_reg)[16] = (regs)->regs.skas.regs[16];			\
+	(pr_reg)[17] = (regs)->regs.skas.regs[17];			\
+	(pr_reg)[18] = (regs)->regs.skas.regs[18];			\
+	(pr_reg)[19] = (regs)->regs.skas.regs[19];			\
+	(pr_reg)[20] = (regs)->regs.skas.regs[20];			\
 	(pr_reg)[21] = current->thread.arch.fs;			\
 	(pr_reg)[22] = 0;					\
 	(pr_reg)[23] = 0;					\
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 82a558b..3eca7a5 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -233,6 +233,7 @@
 
 	/* Architecture-specific hardware disable .. */
 	ptrace_disable(child);
+	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 
 	write_lock_irq(&tasklist_lock);
 	/* protect against de_thread()->release_task() */