Merge branch 'linux-2.6' into merge

50 files changed, 216 insertions, 176 deletions

diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c
index 00af7f2fed6..0bb31982fb6 100644
--- a/arch/arm/mach-pxa/ssp.c
+++ b/arch/arm/mach-pxa/ssp.c
@@ -330,7 +330,7 @@ struct ssp_device *ssp_request(int port, const char *label)
 
 	mutex_unlock(&ssp_lock);
 
-	if (ssp->port_id != port)
+	if (&ssp->node == &ssp_list)
 		return NULL;
 
 	return ssp;
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 853d1f11be0..43687cc60df 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -465,7 +465,6 @@ void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 		printk(KERN_ERR
 		       "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 		       len, slit->header.length);
-		memset(numa_slit, 10, sizeof(numa_slit));
 		return;
 	}
 	slit_table = slit;
@@ -574,8 +573,14 @@ void __init acpi_numa_arch_fixup(void)
 	printk(KERN_INFO "Number of memory chunks in system = %d\n",
 	       num_node_memblks);
 
-	if (!slit_table)
+	if (!slit_table) {
+		for (i = 0; i < MAX_NUMNODES; i++)
+			for (j = 0; j < MAX_NUMNODES; j++)
+				node_distance(i, j) = i == j ? LOCAL_DISTANCE :
+							REMOTE_DISTANCE;
 		return;
+	}
+
 	memset(numa_slit, -1, sizeof(numa_slit));
 	for (i = 0; i < slit_table->locality_count; i++) {
 		if (!pxm_bit_test(i))
diff --git a/arch/ia64/kvm/mmio.c b/arch/ia64/kvm/mmio.c
index 351bf70da46..7f1a858bc69 100644
--- a/arch/ia64/kvm/mmio.c
+++ b/arch/ia64/kvm/mmio.c
@@ -159,7 +159,8 @@ static void mmio_access(struct kvm_vcpu *vcpu, u64 src_pa, u64 *dest,
 
 	if (p->u.ioreq.state == STATE_IORESP_READY) {
 		if (dir == IOREQ_READ)
-			*dest = p->u.ioreq.data;
+			/* it's necessary to ensure zero extending */
+			*dest = p->u.ioreq.data & (~0UL >> (64-(s*8)));
 	} else
 		panic_vm(vcpu);
 out:
diff --git a/arch/m68knommu/platform/coldfire/timers.c b/arch/m68knommu/platform/coldfire/timers.c
index ba5a9f32ebd..454f2549349 100644
--- a/arch/m68knommu/platform/coldfire/timers.c
+++ b/arch/m68knommu/platform/coldfire/timers.c
@@ -111,7 +111,13 @@ void hw_timer_init(void)
 
 	__raw_writew(MCFTIMER_TMR_DISABLE, TA(MCFTIMER_TMR));
 	mcftmr_cycles_per_jiffy = FREQ / HZ;
-	__raw_writetrr(mcftmr_cycles_per_jiffy, TA(MCFTIMER_TRR));
+	/*
+	 *	The coldfire timer runs from 0 to TRR included, then 0
+	 *	again and so on.  It counts thus actually TRR + 1 steps
+	 *	for 1 tick, not TRR.  So if you want n cycles,
+	 *	initialize TRR with n - 1.
+	 */
+	__raw_writetrr(mcftmr_cycles_per_jiffy - 1, TA(MCFTIMER_TRR));
 	__raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
 		MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, TA(MCFTIMER_TMR));
 
diff --git a/arch/parisc/hpux/gate.S b/arch/parisc/hpux/gate.S
index f0b18ce8984..38a1c1b8d4e 100644
--- a/arch/parisc/hpux/gate.S
+++ b/arch/parisc/hpux/gate.S
@@ -13,10 +13,9 @@
 #include <asm/unistd.h>
 #include <asm/errno.h>
 #include <linux/linkage.h>
-#include <linux/init.h>
 
 	.level	LEVEL
-	__HEAD
+	.text
 
 	.import hpux_call_table
 	.import hpux_syscall_exit,code
diff --git a/arch/parisc/hpux/wrappers.S b/arch/parisc/hpux/wrappers.S
index ccd3a50c099..58c53c879c0 100644
--- a/arch/parisc/hpux/wrappers.S
+++ b/arch/parisc/hpux/wrappers.S
@@ -28,10 +28,9 @@
 #include <asm/assembly.h>
 #include <asm/signal.h>
 #include <linux/linkage.h>
-#include <linux/init.h>
 
 	.level	LEVEL
-	__HEAD
+	.text
 
 	/* These should probably go in a header file somewhere.
 	 * They are duplicated in kernel/wrappers.S
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 5d0837458c1..d1fa4edd2d8 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -38,7 +38,6 @@
 #include <asm/thread_info.h>
 
 #include <linux/linkage.h>
-#include <linux/init.h>
 
 #ifdef CONFIG_64BIT
 	.level 2.0w
@@ -622,7 +621,7 @@
 	 * the static part of the kernel address space.
 	 */
 
-	__HEAD
+	.text
 
 	.align	PAGE_SIZE
 
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S
index 5680a2c3b13..a84e31e8287 100644
--- a/arch/parisc/kernel/head.S
+++ b/arch/parisc/kernel/head.S
@@ -33,6 +33,7 @@ ENTRY(boot_args)
 END(boot_args)
 
 	__HEAD
+
 	.align	4
 	.import init_thread_union,data
 	.import fault_vector_20,code    /* IVA parisc 2.0 32 bit */
diff --git a/arch/parisc/kernel/hpmc.S b/arch/parisc/kernel/hpmc.S
index 068322eb8c9..2cbf13b3ef1 100644
--- a/arch/parisc/kernel/hpmc.S
+++ b/arch/parisc/kernel/hpmc.S
@@ -47,7 +47,6 @@
 #include <asm/pdc.h>
 
 #include <linux/linkage.h>
-#include <linux/init.h>
 
 	/*
 	 * stack for os_hpmc, the HPMC handler.
@@ -77,7 +76,7 @@ ENTRY(hpmc_pim_data)
 	.block HPMC_PIM_DATA_SIZE
 END(hpmc_pim_data)
 
-	__HEAD
+	.text
 
 	.import intr_save, code
 ENTRY(os_hpmc)
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
index e3246a5ca74..09b77b2553c 100644
--- a/arch/parisc/kernel/pacache.S
+++ b/arch/parisc/kernel/pacache.S
@@ -37,9 +37,8 @@
 #include <asm/pgtable.h>
 #include <asm/cache.h>
 #include <linux/linkage.h>
-#include <linux/init.h>
 
-	__HEAD
+	.text
 	.align	128
 
 ENTRY(flush_tlb_all_local)
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index 5b7fc4aa044..0eecfbbc59c 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -152,3 +152,6 @@ EXPORT_SYMBOL($$dyncall);
 EXPORT_SYMBOL(node_data);
 EXPORT_SYMBOL(pfnnid_map);
 #endif
+
+/* from pacache.S -- needed for copy_page */
+EXPORT_SYMBOL(copy_user_page_asm);
diff --git a/arch/parisc/kernel/perf_asm.S b/arch/parisc/kernel/perf_asm.S
index d411dfb5b6d..fa6ea99bb32 100644
--- a/arch/parisc/kernel/perf_asm.S
+++ b/arch/parisc/kernel/perf_asm.S
@@ -43,7 +43,7 @@
 ; The coprocessor only needs to be enabled when
 ; starting/stopping the coprocessor with the pmenb/pmdis.
 ;
-	__HEAD
+	.text
 
 ENTRY(perf_intrigue_enable_perf_counters)
 	.proc
diff --git a/arch/parisc/kernel/real2.S b/arch/parisc/kernel/real2.S
index 47fbdae6efd..7a92695d95a 100644
--- a/arch/parisc/kernel/real2.S
+++ b/arch/parisc/kernel/real2.S
@@ -12,7 +12,6 @@
 #include <asm/assembly.h>
 
 #include <linux/linkage.h>
-#include <linux/init.h>
 
 	.section	.bss
 	.export real_stack
@@ -40,7 +39,7 @@ save_cr_end:
 /************************ 32-bit real-mode calls ***********************/
 /* This can be called in both narrow and wide kernels */
 
-	__HEAD
+	.text
 
 	/* unsigned long real32_call_asm(unsigned int *sp,
 	 *		unsigned int *arg0p,
@@ -114,7 +113,7 @@ ENDPROC(real32_call_asm)
 #  define PUSH_CR(r, where) mfctl r, %r1 ! STREG,ma %r1, REG_SZ(where)
 #  define POP_CR(r, where) LDREG,mb -REG_SZ(where), %r1 ! mtctl %r1, r
 
-	__HEAD
+	.text
 save_control_regs:
 	load32	PA(save_cr_space), %r28
 	PUSH_CR(%cr24, %r28)
@@ -146,7 +145,7 @@ restore_control_regs:
 /* rfi_virt2real() and rfi_real2virt() could perhaps be adapted for
  * more general-purpose use by the several places which need RFIs
  */
-	__HEAD
+	.text
 	.align 128
 rfi_virt2real:
 	/* switch to real mode... */
@@ -181,7 +180,7 @@ rfi_v2r_1:
 	bv	0(%r2)
 	nop
 
-	__HEAD
+	.text
 	.align 128
 rfi_real2virt:
 	rsm		PSW_SM_I,%r0
@@ -219,7 +218,7 @@ rfi_r2v_1:
 
 /************************ 64-bit real-mode calls ***********************/
 /* This is only usable in wide kernels right now and will probably stay so */
-	__HEAD
+	.text
 	/* unsigned long real64_call_asm(unsigned long *sp,
 	 *		unsigned long *arg0p,
 	 *		unsigned long fn)
@@ -277,7 +276,7 @@ ENDPROC(real64_call_asm)
 
 #endif
 
-	__HEAD
+	.text
 	/* http://lists.parisc-linux.org/hypermail/parisc-linux/10916.html
 	**	GCC 3.3 and later has a new function in libgcc.a for
 	**	comparing function pointers.
diff --git a/arch/parisc/kernel/signal32.c b/arch/parisc/kernel/signal32.c
index db94affe5c7..fb59852006d 100644
--- a/arch/parisc/kernel/signal32.c
+++ b/arch/parisc/kernel/signal32.c
@@ -289,7 +289,7 @@ setup_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __
 				&sc->sc_iaoq[0], compat_reg);
 		
 		/* Store upper half */
-		compat_reg = (compat_uint_t)(regs->gr[32] >> 32);
+		compat_reg = (compat_uint_t)(regs->gr[31] >> 32);
 		err |= __put_user(compat_reg, &rf->rf_iaoq[0]);
 		DBG(2,"setup_sigcontext32: upper half iaoq[0] = %#x\n", compat_reg);
 		
@@ -299,7 +299,7 @@ setup_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __
 		DBG(2,"setup_sigcontext32: sc->sc_iaoq[1] = %p <= %#x\n",
 				&sc->sc_iaoq[1], compat_reg);
 		/* Store upper half */
-		compat_reg = (compat_uint_t)((regs->gr[32]+4) >> 32);
+		compat_reg = (compat_uint_t)((regs->gr[31]+4) >> 32);
 		err |= __put_user(compat_reg, &rf->rf_iaoq[1]);
 		DBG(2,"setup_sigcontext32: upper half iaoq[1] = %#x\n", compat_reg);
 		
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index ae509d8cd03..69b6eebc466 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -17,7 +17,6 @@
 #include <asm/processor.h>
 
 #include <linux/linkage.h>
-#include <linux/init.h>
 
 	/* We fill the empty parts of the gateway page with
  	 * something that will kill the kernel or a
@@ -27,7 +26,7 @@
 
 	.level          LEVEL
 
-	__HEAD
+	.text
 
 	.import syscall_exit,code
 	.import syscall_exit_rfi,code
@@ -637,7 +636,7 @@ END(sys_call_table64)
 		All light-weight-syscall atomic operations 
 		will use this set of locks 
 	*/
-	.section .data, "aw"
+	.section .data
 	.align	PAGE_SIZE
 ENTRY(lws_lock_start)
 	/* lws locks */
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index 50b4a3a25d0..2e516b87175 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -50,6 +50,7 @@ SECTIONS
 
 	_text = .;		/* Text and read-only data */
 	.text ALIGN(16) : {
+		HEAD_TEXT
 		TEXT_TEXT
 		SCHED_TEXT
 		LOCK_TEXT
diff --git a/arch/parisc/lib/fixup.S b/arch/parisc/lib/fixup.S
index 4821ad6d526..d172d4245cd 100644
--- a/arch/parisc/lib/fixup.S
+++ b/arch/parisc/lib/fixup.S
@@ -23,7 +23,6 @@
 #include <asm/assembly.h>
 #include <asm/errno.h>
 #include <linux/linkage.h>
-#include <linux/init.h>
 
 #ifdef CONFIG_SMP
 	.macro  get_fault_ip t1 t2
@@ -56,7 +55,7 @@
 
 	.level LEVEL
 
-	__HEAD
+	.text
 	.section .fixup, "ax"
 
 	/* get_user() fixups, store -EFAULT in r8, and 0 in r9 */
diff --git a/arch/parisc/lib/lusercopy.S b/arch/parisc/lib/lusercopy.S
index b0d88535084..1bd23ccec17 100644
--- a/arch/parisc/lib/lusercopy.S
+++ b/arch/parisc/lib/lusercopy.S
@@ -33,12 +33,11 @@
  */
 
 
+	.text
+	
 #include <asm/assembly.h>
 #include <asm/errno.h>
 #include <linux/linkage.h>
-#include <linux/init.h>
-
-	__HEAD
 
 	/*
 	 * get_sr gets the appropriate space value into
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 78fe252b92c..ce0da689a89 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -547,6 +547,7 @@ void __init mem_init(void)
 }
 
 unsigned long *empty_zero_page __read_mostly;
+EXPORT_SYMBOL(empty_zero_page);
 
 void show_mem(void)
 {
diff --git a/arch/powerpc/kvm/44x_tlb.c b/arch/powerpc/kvm/44x_tlb.c
index f5d7a5eab96..75dff7cfa81 100644
--- a/arch/powerpc/kvm/44x_tlb.c
+++ b/arch/powerpc/kvm/44x_tlb.c
@@ -116,8 +116,6 @@ static void kvmppc_44x_shadow_release(struct kvm_vcpu *vcpu,
 	struct tlbe *stlbe = &vcpu->arch.shadow_tlb[index];
 	struct page *page = vcpu->arch.shadow_pages[index];
 
-	kunmap(vcpu->arch.shadow_pages[index]);
-
 	if (get_tlb_v(stlbe)) {
 		if (kvmppc_44x_tlbe_is_writable(stlbe))
 			kvm_release_page_dirty(page);
@@ -144,18 +142,19 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn, u64 asid,
 	stlbe = &vcpu->arch.shadow_tlb[victim];
 
 	/* Get reference to new page. */
-	down_write(&current->mm->mmap_sem);
+	down_read(&current->mm->mmap_sem);
 	new_page = gfn_to_page(vcpu->kvm, gfn);
 	if (is_error_page(new_page)) {
-		printk(KERN_ERR "Couldn't get guest page!\n");
+		printk(KERN_ERR "Couldn't get guest page for gfn %lx!\n", gfn);
 		kvm_release_page_clean(new_page);
+		up_read(&current->mm->mmap_sem);
 		return;
 	}
 	hpaddr = page_to_phys(new_page);
 
 	/* Drop reference to old page. */
 	kvmppc_44x_shadow_release(vcpu, victim);
-	up_write(&current->mm->mmap_sem);
+	up_read(&current->mm->mmap_sem);
 
 	vcpu->arch.shadow_pages[victim] = new_page;
 
diff --git a/arch/powerpc/kvm/booke_guest.c b/arch/powerpc/kvm/booke_guest.c
index 712d89a28c4..9c8ad850c6e 100644
--- a/arch/powerpc/kvm/booke_guest.c
+++ b/arch/powerpc/kvm/booke_guest.c
@@ -227,39 +227,6 @@ void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu)
 	}
 }
 
-static int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
-{
-	enum emulation_result er;
-	int r;
-
-	er = kvmppc_emulate_instruction(run, vcpu);
-	switch (er) {
-	case EMULATE_DONE:
-		/* Future optimization: only reload non-volatiles if they were
-		 * actually modified. */
-		r = RESUME_GUEST_NV;
-		break;
-	case EMULATE_DO_MMIO:
-		run->exit_reason = KVM_EXIT_MMIO;
-		/* We must reload nonvolatiles because "update" load/store
-		 * instructions modify register state. */
-		/* Future optimization: only reload non-volatiles if they were
-		 * actually modified. */
-		r = RESUME_HOST_NV;
-		break;
-	case EMULATE_FAIL:
-		/* XXX Deliver Program interrupt to guest. */
-		printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
-		       vcpu->arch.last_inst);
-		r = RESUME_HOST;
-		break;
-	default:
-		BUG();
-	}
-
-	return r;
-}
-
 /**
  * kvmppc_handle_exit
  *
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index a03fe0c8069..00009746128 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -246,6 +246,11 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
 	case 31:
 		switch (get_xop(inst)) {
 
+		case 23:                                        /* lwzx */
+			rt = get_rt(inst);
+			emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
+			break;
+
 		case 83:                                        /* mfmsr */
 			rt = get_rt(inst);
 			vcpu->arch.gpr[rt] = vcpu->arch.msr;
@@ -267,6 +272,13 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
 			kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
 			break;
 
+		case 151:                                       /* stwx */
+			rs = get_rs(inst);
+			emulated = kvmppc_handle_store(run, vcpu,
+			                               vcpu->arch.gpr[rs],
+			                               4, 1);
+			break;
+
 		case 163:                                       /* wrteei */
 			vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
 			                 | (inst & MSR_EE);
diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
index f639a152869..a0775e1f08d 100644
--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -20,7 +20,7 @@ static int __diag_time_slice_end(struct kvm_vcpu *vcpu)
 	VCPU_EVENT(vcpu, 5, "%s", "diag time slice end");
 	vcpu->stat.diagnose_44++;
 	vcpu_put(vcpu);
-	schedule();
+	yield();
 	vcpu_load(vcpu);
 	return 0;
 }
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index fcd1ed8015c..84a7fed4cd4 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -339,6 +339,11 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
 	if (kvm_cpu_has_interrupt(vcpu))
 		return 0;
 
+	__set_cpu_idle(vcpu);
+	spin_lock_bh(&vcpu->arch.local_int.lock);
+	vcpu->arch.local_int.timer_due = 0;
+	spin_unlock_bh(&vcpu->arch.local_int.lock);
+
 	if (psw_interrupts_disabled(vcpu)) {
 		VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
 		__unset_cpu_idle(vcpu);
@@ -366,8 +371,6 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
 no_timer:
 	spin_lock_bh(&vcpu->arch.local_int.float_int->lock);
 	spin_lock_bh(&vcpu->arch.local_int.lock);
-	__set_cpu_idle(vcpu);
-	vcpu->arch.local_int.timer_due = 0;
 	add_wait_queue(&vcpu->arch.local_int.wq, &wait);
 	while (list_empty(&vcpu->arch.local_int.list) &&
 		list_empty(&vcpu->arch.local_int.float_int->list) &&
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 0ac36a649eb..6558b09ff57 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -423,6 +423,8 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 	return -EINVAL; /* not implemented yet */
 }
 
+extern void s390_handle_mcck(void);
+
 static void __vcpu_run(struct kvm_vcpu *vcpu)
 {
 	memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16);
@@ -430,13 +432,21 @@ static void __vcpu_run(struct kvm_vcpu *vcpu)
 	if (need_resched())
 		schedule();
 
+	if (test_thread_flag(TIF_MCCK_PENDING))
+		s390_handle_mcck();
+
+	kvm_s390_deliver_pending_interrupts(vcpu);
+
 	vcpu->arch.sie_block->icptcode = 0;
 	local_irq_disable();
 	kvm_guest_enter();
 	local_irq_enable();
 	VCPU_EVENT(vcpu, 6, "entering sie flags %x",
 		   atomic_read(&vcpu->arch.sie_block->cpuflags));
-	sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs);
+	if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) {
+		VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
+		kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+	}
 	VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
 		   vcpu->arch.sie_block->icptcode);
 	local_irq_disable();
@@ -475,7 +485,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 	might_sleep();
 
 	do {
-		kvm_s390_deliver_pending_interrupts(vcpu);
 		__vcpu_run(vcpu);
 		rc = kvm_handle_sie_intercept(vcpu);
 	} while (!signal_pending(current) && !rc);
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 5c1aea97cd1..3d98ba82ea6 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -254,36 +254,46 @@ void disable_noexec(struct mm_struct *mm, struct task_struct *tsk)
 int s390_enable_sie(void)
 {
 	struct task_struct *tsk = current;
-	struct mm_struct *mm;
-	int rc;
+	struct mm_struct *mm, *old_mm;
 
-	task_lock(tsk);
-
-	rc = 0;
+	/* Do we have pgstes? if yes, we are done */
 	if (tsk->mm->context.pgstes)
-		goto unlock;
+		return 0;
 
-	rc = -EINVAL;
+	/* lets check if we are allowed to replace the mm */
+	task_lock(tsk);
 	if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 ||
-	    tsk->mm != tsk->active_mm || tsk->mm->ioctx_list)
-		goto unlock;
+	    tsk->mm != tsk->active_mm || tsk->mm->ioctx_list) {
+		task_unlock(tsk);
+		return -EINVAL;
+	}
+	task_unlock(tsk);
 
-	tsk->mm->context.pgstes = 1;	/* dirty little tricks .. */
+	/* we copy the mm with pgstes enabled */
+	tsk->mm->context.pgstes = 1;
 	mm = dup_mm(tsk);
 	tsk->mm->context.pgstes = 0;
-
-	rc = -ENOMEM;
 	if (!mm)
-		goto unlock;
-	mmput(tsk->mm);
+		return -ENOMEM;
+
+	/* Now lets check again if somebody attached ptrace etc */
+	task_lock(tsk);
+	if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 ||
+	    tsk->mm != tsk->active_mm || tsk->mm->ioctx_list) {
+		mmput(mm);
+		task_unlock(tsk);
+		return -EINVAL;
+	}
+
+	/* ok, we are alone. No ptrace, no threads, etc. */
+	old_mm = tsk->mm;
 	tsk->mm = tsk->active_mm = mm;
 	preempt_disable();
 	update_mm(mm, tsk);
 	cpu_set(smp_processor_id(), mm->cpu_vm_mask);
 	preempt_enable();
-	rc = 0;
-unlock:
 	task_unlock(tsk);
-	return rc;
+	mmput(old_mm);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(s390_enable_sie);
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index b4b36e0f2e8..183db26d01b 100644
--- a/