5 files changed, 213 insertions, 82 deletions

diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 960ba6029c3a..bc59282da762 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -62,7 +62,7 @@ typedef struct
 } debug_sprintf_entry_t;
 
 
-extern void tod_to_timeval(uint64_t todval, struct timeval *xtime);
+extern void tod_to_timeval(uint64_t todval, struct timespec *xtime);
 
 /* internal function prototyes */
 
@@ -374,9 +374,24 @@ debug_info_copy(debug_info_t* in, int mode)
 {
         int i,j;
         debug_info_t* rc;
+        unsigned long flags;
+
+        /* get a consistent copy of the debug areas */
+        do {
+                rc = debug_info_alloc(in->name, in->pages_per_area,
+                        in->nr_areas, in->buf_size, in->level, mode);
+                spin_lock_irqsave(&in->lock, flags);
+                if(!rc)
+                        goto out;
+                /* has something changed in the meantime ? */
+                if((rc->pages_per_area == in->pages_per_area) &&
+                   (rc->nr_areas == in->nr_areas)) {
+                        break;
+                }
+                spin_unlock_irqrestore(&in->lock, flags);
+                debug_info_free(rc);
+        } while (1);
 
-        rc = debug_info_alloc(in->name, in->pages_per_area, in->nr_areas,
-                                in->buf_size, in->level, mode);
         if(!rc || (mode == NO_AREAS))
                 goto out;
 
@@ -386,6 +401,7 @@ debug_info_copy(debug_info_t* in, int mode)
                 }
         }
 out:
+        spin_unlock_irqrestore(&in->lock, flags);
         return rc;
 }
 
@@ -593,19 +609,15 @@ debug_open(struct inode *inode, struct file *file)
         debug_info_t *debug_info, *debug_info_snapshot;
 
         down(&debug_lock);
-
-        /* find debug log and view */
-        debug_info = debug_area_first;
-        while(debug_info != NULL){
-                for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
-                        if (!debug_info->views[i])
-                                continue;
-                        else if (debug_info->debugfs_entries[i] ==
-                                 file->f_dentry) {
-                                goto found;     /* found view ! */
-                        }
+        debug_info = (struct debug_info*)file->f_dentry->d_inode->u.generic_ip;
+        /* find debug view */
+        for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
+                if (!debug_info->views[i])
+                        continue;
+                else if (debug_info->debugfs_entries[i] ==
+                         file->f_dentry) {
+                        goto found;     /* found view ! */
                 }
-                debug_info = debug_info->next;
         }
         /* no entry found */
         rc = -EINVAL;
@@ -833,7 +845,7 @@ extern inline void
 debug_finish_entry(debug_info_t * id, debug_entry_t* active, int level,
                         int exception)
 {
-        STCK(active->id.stck);
+        active->id.stck = get_clock();
         active->id.fields.cpuid = smp_processor_id();
         active->caller = __builtin_return_address(0);
         active->id.fields.exception = exception;
@@ -1078,7 +1090,7 @@ debug_register_view(debug_info_t * id, struct debug_view *view)
         if (view->input_proc)
                 mode |= S_IWUSR;
         pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,
-                                NULL, &debug_file_ops);
+                                id , &debug_file_ops);
         if (!pde){
                 printk(KERN_WARNING "debug: debugfs_create_file() failed!"\
                         " Cannot register view %s/%s\n", id->name,view->name);
@@ -1432,7 +1444,7 @@ int
 debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
                          int area, debug_entry_t * entry, char *out_buf)
 {
-        struct timeval time_val;
+        struct timespec time_spec;
         unsigned long long time;
         char *except_str;
         unsigned long caller;
@@ -1443,7 +1455,7 @@ debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
         time = entry->id.stck;
         /* adjust todclock to 1970 */
         time -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
-        tod_to_timeval(time, &time_val);
+        tod_to_timeval(time, &time_spec);
 
         if (entry->id.fields.exception)
                 except_str = "*";
@@ -1451,7 +1463,7 @@ debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
                 except_str = "-";
         caller = ((unsigned long) entry->caller) & PSW_ADDR_INSN;
         rc += sprintf(out_buf, "%02i %011lu:%06lu %1u %1s %02i %p  ",
-                      area, time_val.tv_sec, time_val.tv_usec, level,
+                      area, time_spec.tv_sec, time_spec.tv_nsec / 1000, level,
                       except_str, entry->id.fields.cpuid, (void *) caller);
         return rc;
 }
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 1a271b16cb5c..cbe7d6a2d02c 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -138,14 +138,14 @@ STACK_SIZE  = 1 << STACK_SHIFT
         st      %r12,__SF_BACKCHAIN(%r15)       # clear back chain
         .endm
 
-        .macro  RESTORE_ALL sync
-        mvc     __LC_RETURN_PSW(8),SP_PSW(%r15) # move user PSW to lowcore
+        .macro  RESTORE_ALL psworg,sync
+        mvc     \psworg(8),SP_PSW(%r15) # move user PSW to lowcore
         .if !\sync
-        ni      __LC_RETURN_PSW+1,0xfd  # clear wait state bit
+        ni      \psworg+1,0xfd          # clear wait state bit
         .endif
         lm      %r0,%r15,SP_R0(%r15)    # load gprs 0-15 of user
         STORE_TIMER __LC_EXIT_TIMER
-        lpsw    __LC_RETURN_PSW         # back to caller
+        lpsw    \psworg                 # back to caller
         .endm
 
 /*
@@ -235,7 +235,7 @@ sysc_return:
         tm      __TI_flags+3(%r9),_TIF_WORK_SVC
         bnz     BASED(sysc_work)  # there is work to do (signals etc.)
 sysc_leave:
-        RESTORE_ALL 1
+        RESTORE_ALL __LC_RETURN_PSW,1
 
 #
 # recheck if there is more work to do
@@ -312,8 +312,6 @@ sysc_singlestep:
         la      %r14,BASED(sysc_return) # load adr. of system return
         br      %r1                     # branch to do_single_step
 
-__critical_end:
-
 #
 # call trace before and after sys_call
 #
@@ -571,7 +569,8 @@ io_return:
         tm      __TI_flags+3(%r9),_TIF_WORK_INT
         bnz     BASED(io_work)         # there is work to do (signals etc.)
 io_leave:
-        RESTORE_ALL 0
+        RESTORE_ALL __LC_RETURN_PSW,0
+io_done:
 
 #ifdef CONFIG_PREEMPT
 io_preempt:
@@ -621,7 +620,7 @@ io_work_loop:
 #
 io_mcck_pending:
         l       %r1,BASED(.Ls390_handle_mcck)
-        l       %r14,BASED(io_work_loop)
+        la      %r14,BASED(io_work_loop)
         br      %r1                    # TIF bit will be cleared by handler
 
 #
@@ -674,6 +673,8 @@ ext_no_vtime:
         basr    %r14,%r1
         b       BASED(io_return)
 
+__critical_end:
+
 /*
  * Machine check handler routines
  */
@@ -681,6 +682,7 @@ ext_no_vtime:
         .globl mcck_int_handler
 mcck_int_handler:
         spt     __LC_CPU_TIMER_SAVE_AREA        # revalidate cpu timer
+        mvc     __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
         lm      %r0,%r15,__LC_GPREGS_SAVE_AREA  # revalidate gprs
         SAVE_ALL_BASE __LC_SAVE_AREA+32
         la      %r12,__LC_MCK_OLD_PSW
@@ -693,17 +695,8 @@ mcck_int_handler:
         mvc     __LC_ASYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
         mvc     __LC_SYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
         mvc     __LC_EXIT_TIMER(8),__LC_LAST_UPDATE_TIMER
-0:      tm      __LC_MCCK_CODE+2,0x08   # mwp of old psw valid?
-        bno     BASED(mcck_no_vtime)    # no -> skip cleanup critical
-        tm      __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
-        bz      BASED(mcck_no_vtime)
-        UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
-        UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
-mcck_no_vtime:
 #endif
-0:
-        tm      __LC_MCCK_CODE+2,0x09   # mwp + ia of old psw valid?
+0:      tm      __LC_MCCK_CODE+2,0x09   # mwp + ia of old psw valid?
         bno     BASED(mcck_int_main)    # no -> skip cleanup critical
         tm      __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
         bnz     BASED(mcck_int_main)    # from user -> load async stack
@@ -720,6 +713,16 @@ mcck_int_main:
         be      BASED(0f)
         l       %r15,__LC_PANIC_STACK   # load panic stack
 0:      CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+        tm      __LC_MCCK_CODE+2,0x08   # mwp of old psw valid?
+        bno     BASED(mcck_no_vtime)    # no -> skip cleanup critical
+        tm      __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
+        bz      BASED(mcck_no_vtime)
+        UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
+        UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
+        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+mcck_no_vtime:
+#endif
         l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
         la      %r2,SP_PTREGS(%r15)     # load pt_regs
         l       %r1,BASED(.Ls390_mcck)
@@ -737,7 +740,7 @@ mcck_int_main:
         l       %r1,BASED(.Ls390_handle_mcck)
         basr    %r14,%r1                # call machine check handler
 mcck_return:
-        RESTORE_ALL 0
+        RESTORE_ALL __LC_RETURN_MCCK_PSW,0
 
 #ifdef CONFIG_SMP
 /*
@@ -803,6 +806,10 @@ cleanup_table_sysc_leave:
         .long   sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
 cleanup_table_sysc_work_loop:
         .long   sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
+cleanup_table_io_leave:
+        .long   io_leave + 0x80000000, io_done + 0x80000000
+cleanup_table_io_work_loop:
+        .long   io_work_loop + 0x80000000, io_mcck_pending + 0x80000000
 
 cleanup_critical:
         clc     4(4,%r12),BASED(cleanup_table_system_call)
@@ -825,10 +832,26 @@ cleanup_critical:
         clc     4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
         bl      BASED(cleanup_sysc_return)
 0:
+        clc     4(4,%r12),BASED(cleanup_table_io_leave)
+        bl      BASED(0f)
+        clc     4(4,%r12),BASED(cleanup_table_io_leave+4)
+        bl      BASED(cleanup_io_leave)
+0:
+        clc     4(4,%r12),BASED(cleanup_table_io_work_loop)
+        bl      BASED(0f)
+        clc     4(4,%r12),BASED(cleanup_table_io_work_loop+4)
+        bl      BASED(cleanup_io_return)
+0:
         br      %r14
 
 cleanup_system_call:
         mvc     __LC_RETURN_PSW(8),0(%r12)
+        c       %r12,BASED(.Lmck_old_psw)
+        be      BASED(0f)
+        la      %r12,__LC_SAVE_AREA+16
+        b       BASED(1f)
+0:      la      %r12,__LC_SAVE_AREA+32
+1:
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
         clc     __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+4)
         bh      BASED(0f)
@@ -838,11 +861,13 @@ cleanup_system_call:
 #endif
         clc     __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn)
         bh      BASED(0f)
-        mvc     __LC_SAVE_AREA(16),__LC_SAVE_AREA+16
-0:      st      %r13,__LC_SAVE_AREA+20
+        mvc     __LC_SAVE_AREA(16),0(%r12)
+0:      st      %r13,4(%r12)
+        st      %r12,__LC_SAVE_AREA+48  # argh
         SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
         CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
-        st      %r15,__LC_SAVE_AREA+28
+        l       %r12,__LC_SAVE_AREA+48  # argh
+        st      %r15,12(%r12)
         lh      %r7,0x8a
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 cleanup_vtime:
@@ -879,17 +904,21 @@ cleanup_sysc_return:
 
 cleanup_sysc_leave:
         clc     4(4,%r12),BASED(cleanup_sysc_leave_insn)
-        be      BASED(0f)
+        be      BASED(2f)
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
         mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
         clc     4(4,%r12),BASED(cleanup_sysc_leave_insn+4)
-        be      BASED(0f)
+        be      BASED(2f)
 #endif
         mvc     __LC_RETURN_PSW(8),SP_PSW(%r15)
-        mvc     __LC_SAVE_AREA+16(16),SP_R12(%r15)
-        lm      %r0,%r11,SP_R0(%r15)
+        c       %r12,BASED(.Lmck_old_psw)
+        bne     BASED(0f)
+        mvc     __LC_SAVE_AREA+32(16),SP_R12(%r15)
+        b       BASED(1f)
+0:      mvc     __LC_SAVE_AREA+16(16),SP_R12(%r15)
+1:      lm      %r0,%r11,SP_R0(%r15)
         l       %r15,SP_R15(%r15)
-0:      la      %r12,__LC_RETURN_PSW
+2:      la      %r12,__LC_RETURN_PSW
         br      %r14
 cleanup_sysc_leave_insn:
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
@@ -897,6 +926,36 @@ cleanup_sysc_leave_insn:
 #endif
         .long   sysc_leave + 10 + 0x80000000
 
+cleanup_io_return:
+        mvc     __LC_RETURN_PSW(4),0(%r12)
+        mvc     __LC_RETURN_PSW+4(4),BASED(cleanup_table_io_work_loop)
+        la      %r12,__LC_RETURN_PSW
+        br      %r14
+
+cleanup_io_leave:
+        clc     4(4,%r12),BASED(cleanup_io_leave_insn)
+        be      BASED(2f)
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+        mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
+        clc     4(4,%r12),BASED(cleanup_io_leave_insn+4)
+        be      BASED(2f)
+#endif
+        mvc     __LC_RETURN_PSW(8),SP_PSW(%r15)
+        c       %r12,BASED(.Lmck_old_psw)
+        bne     BASED(0f)
+        mvc     __LC_SAVE_AREA+32(16),SP_R12(%r15)
+        b       BASED(1f)
+0:      mvc     __LC_SAVE_AREA+16(16),SP_R12(%r15)
+1:      lm      %r0,%r11,SP_R0(%r15)
+        l       %r15,SP_R15(%r15)
+2:      la      %r12,__LC_RETURN_PSW
+        br      %r14
+cleanup_io_leave_insn:
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+        .long   io_leave + 18 + 0x80000000
+#endif
+        .long   io_leave + 14 + 0x80000000
+
 /*
  * Integer constants
  */
@@ -918,6 +977,7 @@ cleanup_sysc_leave_insn:
 .Ls390_mcck:   .long  s390_do_machine_check
 .Ls390_handle_mcck:
                .long  s390_handle_mcck
+.Lmck_old_psw: .long  __LC_MCK_OLD_PSW
 .Ldo_IRQ:      .long  do_IRQ
 .Ldo_extint:   .long  do_extint
 .Ldo_signal:   .long  do_signal
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index d9f22915008c..fb77b72ab262 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -131,14 +131,14 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
         stg     %r12,__SF_BACKCHAIN(%r15)
         .endm
 
-        .macro  RESTORE_ALL sync
-        mvc     __LC_RETURN_PSW(16),SP_PSW(%r15) # move user PSW to lowcore
+        .macro  RESTORE_ALL psworg,sync
+        mvc     \psworg(16),SP_PSW(%r15) # move user PSW to lowcore
         .if !\sync
-        ni      __LC_RETURN_PSW+1,0xfd  # clear wait state bit
+        ni      \psworg+1,0xfd          # clear wait state bit
         .endif
         lmg     %r0,%r15,SP_R0(%r15)    # load gprs 0-15 of user
         STORE_TIMER __LC_EXIT_TIMER
-        lpswe   __LC_RETURN_PSW         # back to caller
+        lpswe   \psworg                 # back to caller
         .endm
 
 /*
@@ -214,8 +214,8 @@ sysc_nr_ok:
 sysc_do_restart:
         larl    %r10,sys_call_table
 #ifdef CONFIG_S390_SUPPORT
-        tm      SP_PSW+3(%r15),0x01  # are we running in 31 bit mode ?
-        jo      sysc_noemu
+        tm      __TI_flags+5(%r9),(_TIF_31BIT>>16)  # running in 31 bit mode ?
+        jno     sysc_noemu
         larl    %r10,sys_call_table_emu  # use 31 bit emulation system calls
 sysc_noemu:
 #endif
@@ -233,7 +233,7 @@ sysc_return:
         tm      __TI_flags+7(%r9),_TIF_WORK_SVC
         jnz     sysc_work         # there is work to do (signals etc.)
 sysc_leave:
-        RESTORE_ALL 1
+        RESTORE_ALL __LC_RETURN_PSW,1
 
 #
 # recheck if there is more work to do
@@ -308,8 +308,6 @@ sysc_singlestep:
         jg      do_single_step          # branch to do_sigtrap
 
 
-__critical_end:
-
 #
 # call syscall_trace before and after system call
 # special linkage: %r12 contains the return address for trace_svc
@@ -612,7 +610,8 @@ io_return:
         tm      __TI_flags+7(%r9),_TIF_WORK_INT
         jnz     io_work                # there is work to do (signals etc.)
 io_leave:
-        RESTORE_ALL 0
+        RESTORE_ALL __LC_RETURN_PSW,0
+io_done:
 
 #ifdef CONFIG_PREEMPT
 io_preempt:
@@ -711,6 +710,8 @@ ext_no_vtime:
         brasl   %r14,do_extint
         j       io_return
 
+__critical_end:
+
 /*
  * Machine check handler routines
  */
@@ -718,6 +719,7 @@ ext_no_vtime:
 mcck_int_handler:
         la      %r1,4095                # revalidate r1
         spt     __LC_CPU_TIMER_SAVE_AREA-4095(%r1)      # revalidate cpu timer
+        mvc     __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA-4095(%r1)
         lmg     %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# revalidate gprs
         SAVE_ALL_BASE __LC_SAVE_AREA+64
         la      %r12,__LC_MCK_OLD_PSW
@@ -730,17 +732,8 @@ mcck_int_handler:
         mvc     __LC_ASYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
         mvc     __LC_SYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
         mvc     __LC_EXIT_TIMER(8),__LC_LAST_UPDATE_TIMER
-0:      tm      __LC_MCCK_CODE+2,0x08   # mwp of old psw valid?
-        jno     mcck_no_vtime           # no -> no timer update
-        tm      __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
-        jz      mcck_no_vtime
-        UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
-        UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
-mcck_no_vtime:
 #endif
-0:
-        tm      __LC_MCCK_CODE+2,0x09   # mwp + ia of old psw valid?
+0:      tm      __LC_MCCK_CODE+2,0x09   # mwp + ia of old psw valid?
         jno     mcck_int_main           # no -> skip cleanup critical
         tm      __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
         jnz     mcck_int_main           # from user -> load kernel stack
@@ -756,6 +749,16 @@ mcck_int_main:
         jz      0f
         lg      %r15,__LC_PANIC_STACK   # load panic stack
 0:      CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+64
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+        tm      __LC_MCCK_CODE+2,0x08   # mwp of old psw valid?
+        jno     mcck_no_vtime           # no -> no timer update
+        tm      __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
+        jz      mcck_no_vtime
+        UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
+        UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
+        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+mcck_no_vtime:
+#endif
         lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
         la      %r2,SP_PTREGS(%r15)     # load pt_regs
         brasl   %r14,s390_do_machine_check
@@ -771,7 +774,7 @@ mcck_int_main:
         jno     mcck_return
         brasl   %r14,s390_handle_mcck
 mcck_return:
-        RESTORE_ALL 0
+        RESTORE_ALL __LC_RETURN_MCCK_PSW,0
 
 #ifdef CONFIG_SMP
 /*
@@ -833,6 +836,10 @@ cleanup_table_sysc_leave:
         .quad   sysc_leave, sysc_work_loop
 cleanup_table_sysc_work_loop:
         .quad   sysc_work_loop, sysc_reschedule
+cleanup_table_io_leave:
+        .quad   io_leave, io_done
+cleanup_table_io_work_loop:
+        .quad   io_work_loop, io_mcck_pending
 
 cleanup_critical:
         clc     8(8,%r12),BASED(cleanup_table_system_call)
@@ -855,10 +862,26 @@ cleanup_critical:
         clc     8(8,%r12),BASED(cleanup_table_sysc_work_loop+8)
         jl      cleanup_sysc_return
 0:
+        clc     8(8,%r12),BASED(cleanup_table_io_leave)
+        jl      0f
+        clc     8(8,%r12),BASED(cleanup_table_io_leave+8)
+        jl      cleanup_io_leave
+0:
+        clc     8(8,%r12),BASED(cleanup_table_io_work_loop)
+        jl      0f
+        clc     8(8,%r12),BASED(cleanup_table_io_work_loop+8)
+        jl      cleanup_io_return
+0:
         br      %r14
 
 cleanup_system_call:
         mvc     __LC_RETURN_PSW(16),0(%r12)
+        cghi    %r12,__LC_MCK_OLD_PSW
+        je      0f
+        la      %r12,__LC_SAVE_AREA+32
+        j       1f
+0:      la      %r12,__LC_SAVE_AREA+64
+1:
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
         clc     __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+8)
         jh      0f
@@ -868,11 +891,13 @@ cleanup_system_call:
 #endif
         clc     __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn)
         jh      0f
-        mvc     __LC_SAVE_AREA(32),__LC_SAVE_AREA+32
-0:      stg     %r13,__LC_SAVE_AREA+40
+        mvc     __LC_SAVE_AREA(32),0(%r12)
+0:      stg     %r13,8(%r12)
+        stg     %r12,__LC_SAVE_AREA+96  # argh
         SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
         CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
-        stg     %r15,__LC_SAVE_AREA+56
+        lg      %r12,__LC_SAVE_AREA+96  # argh
+        stg     %r15,24(%r12)
         llgh    %r7,__LC_SVC_INT_CODE
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 cleanup_vtime:
@@ -909,17 +934,21 @@ cleanup_sysc_return:
 
 cleanup_sysc_leave:
         clc     8(8,%r12),BASED(cleanup_sysc_leave_insn)
-        je      0f
+        je      2f
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
         mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
         clc     8(8,%r12),BASED(cleanup_sysc_leave_insn+8)
-        je      0f
+        je      2f
 #endif
         mvc     __LC_RETURN_PSW(16),SP_PSW(%r15)
-        mvc     __LC_SAVE_AREA+32(32),SP_R12(%r15)
-        lmg     %r0,%r11,SP_R0(%r15)
+        cghi    %r12,__LC_MCK_OLD_PSW
+        jne     0f
+        mvc     __LC_SAVE_AREA+64(32),SP_R12(%r15)
+        j       1f
+0:      mvc     __LC_SAVE_AREA+32(32),SP_R12(%r15)
+1:      lmg     %r0,%r11,SP_R0(%r15)
         lg      %r15,SP_R15(%r15)
-0:      la      %r12,__LC_RETURN_PSW
+2:      la      %r12,__LC_RETURN_PSW
         br      %r14
 cleanup_sysc_leave_insn:
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
@@ -927,6 +956,36 @@ cleanup_sysc_leave_insn:
 #endif
         .quad   sysc_leave + 12
 
+cleanup_io_return:
+        mvc     __LC_RETURN_PSW(8),0(%r12)
+        mvc     __LC_RETURN_PSW+8(8),BASED(cleanup_table_io_work_loop)
+        la      %r12,__LC_RETURN_PSW
+        br      %r14
+
+cleanup_io_leave:
+        clc     8(8,%r12),BASED(cleanup_io_leave_insn)
+        je      2f
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+        mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
+        clc     8(8,%r12),BASED(cleanup_io_leave_insn+8)
+        je      2f
+#endif
+        mvc     __LC_RETURN_PSW(16),SP_PSW(%r15)
+        cghi    %r12,__LC_MCK_OLD_PSW
+        jne     0f
+        mvc     __LC_SAVE_AREA+64(32),SP_R12(%r15)
+        j       1f
+0:      mvc     __LC_SAVE_AREA+32(32),SP_R12(%r15)
+1:      lmg     %r0,%r11,SP_R0(%r15)
+        lg      %r15,SP_R15(%r15)
+2:      la      %r12,__LC_RETURN_PSW
+        br      %r14
+cleanup_io_leave_insn:
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+        .quad   io_leave + 20
+#endif
+        .quad   io_leave + 16
+
 /*
  * Integer constants
  */
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 8ca485676780..2fd75da15495 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -139,10 +139,7 @@ int do_settimeofday(struct timespec *tv)
         set_normalized_timespec(&xtime, sec, nsec);
         set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
 
-        time_adjust = 0;                /* stop active adjtime() */
-        time_status |= STA_UNSYNC;
-        time_maxerror = NTP_PHASE_LIMIT;
-        time_esterror = NTP_PHASE_LIMIT;
+        ntp_clear();
         write_sequnlock_irq(&xtime_lock);
         clock_was_set();
         return 0;
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 75fde949d125..856a971759b1 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -563,12 +563,14 @@ pfault_interrupt(struct pt_regs *regs, __u16 error_code)
                          * interrupt. pfault_wait is valid. Set pfault_wait
                          * back to zero and wake up the process. This can
                          * safely be done because the task is still sleeping
-                         * and can't procude new pfaults. */
+                         * and can't produce new pfaults. */
                         tsk->thread.pfault_wait = 0;
                         wake_up_process(tsk);
+                        put_task_struct(tsk);
                 }
         } else {
                 /* signal bit not set -> a real page is missing. */
+                get_task_struct(tsk);
                 set_task_state(tsk, TASK_UNINTERRUPTIBLE);
                 if (xchg(&tsk->thread.pfault_wait, 1) != 0) {
                         /* Completion interrupt was faster than the initial
@@ -578,6 +580,7 @@ pfault_interrupt(struct pt_regs *regs, __u16 error_code)
                          * mode and can't produce new pfaults. */
                         tsk->thread.pfault_wait = 0;
                         set_task_state(tsk, TASK_RUNNING);
+                        put_task_struct(tsk);
                 } else
                         set_tsk_need_resched(tsk);
         }