8 files changed, 55 insertions, 8 deletions

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index ab1e49d2e51..8584dd82321 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -6,7 +6,7 @@ EXTRA_AFLAGS	:= -traditional
 
 obj-y   :=  bitmap.o traps.o time.o process.o \
             setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
-            semaphore.o s390_ext.o debug.o profile.o irq.o
+            semaphore.o s390_ext.o debug.o profile.o irq.o reipl_diag.o
 
 extra-$(CONFIG_ARCH_S390_31)    += head.o 
 extra-$(CONFIG_ARCH_S390X)      += head64.o 
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 7358cdb8441..4ff6808456e 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -143,7 +143,7 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
                         break;
                 case __SI_FAULT >> 16:
                         err |= __get_user(tmp, &from->si_addr);
-                        to->si_addr = (void *)(u64) (tmp & PSW32_ADDR_INSN);
+                        to->si_addr = (void __user *)(u64) (tmp & PSW32_ADDR_INSN);
                         break;
                 case __SI_POLL >> 16:
                         err |= __get_user(to->si_band, &from->si_band);
@@ -338,7 +338,7 @@ sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss,
                 err |= __get_user(kss.ss_flags, &uss->ss_flags);
                 if (err)
                         return -EFAULT;
-                kss.ss_sp = (void *) ss_sp;
+                kss.ss_sp = (void __user *) ss_sp;
         }
 
         set_fs (KERNEL_DS);
@@ -461,7 +461,7 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
                 goto badframe;
 
         err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
-        st.ss_sp = (void *) A((unsigned long)ss_sp);
+        st.ss_sp = compat_ptr(ss_sp);
         err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size);
         err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags);
         if (err)
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 58fc7fbcb40..9b30f4cf32c 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -108,7 +108,7 @@ STACK_SIZE  = 1 << STACK_SHIFT
         bl      BASED(0f)
         l       %r14,BASED(.Lcleanup_critical)
         basr    %r14,%r14
-        tm      0(%r12),0x01            # retest problem state after cleanup
+        tm      1(%r12),0x01            # retest problem state after cleanup
         bnz     BASED(1f)
 0:      l       %r14,__LC_ASYNC_STACK   # are we already on the async stack ?
         slr     %r14,%r15
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index d0c9ffaa25d..7b9b4a2ba1d 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -101,7 +101,7 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
         clc     \psworg+8(8),BASED(.Lcritical_start)
         jl      0f
         brasl   %r14,cleanup_critical
-        tm      0(%r12),0x01            # retest problem state after cleanup
+        tm      1(%r12),0x01            # retest problem state after cleanup
         jnz     1f
 0:      lg      %r14,__LC_ASYNC_STACK   # are we already on the async. stack ?
         slgr    %r14,%r15
diff --git a/arch/s390/kernel/reipl_diag.c b/arch/s390/kernel/reipl_diag.c
new file mode 100644
index 00000000000..83cb42bc0b7
--- /dev/null
+++ b/arch/s390/kernel/reipl_diag.c
@@ -0,0 +1,39 @@
+/*
+ * This file contains the implementation of the
+ * Linux re-IPL support
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Volker Sameske (sameske@de.ibm.com)
+ *
+ */
+
+#include <linux/kernel.h>
+
+static unsigned int reipl_diag_rc1;
+static unsigned int reipl_diag_rc2;
+
+/*
+ * re-IPL the system using the last used IPL parameters
+ */
+void reipl_diag(void)
+{
+        asm volatile (
+                "   la   %%r4,0\n"
+                "   la   %%r5,0\n"
+                "   diag %%r4,%2,0x308\n"
+                "0:\n"
+                "   st   %%r4,%0\n"
+                "   st   %%r5,%1\n"
+                ".section __ex_table,\"a\"\n"
+#ifdef __s390x__
+                "   .align 8\n"
+                "   .quad 0b, 0b\n"
+#else
+                "   .align 4\n"
+                "   .long 0b, 0b\n"
+#endif
+                ".previous\n"
+                : "=m" (reipl_diag_rc1), "=m" (reipl_diag_rc2)
+                : "d" (3) : "cc", "4", "5" );
+}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 5ba5a5485da..5204778b8e5 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -261,8 +261,11 @@ void (*_machine_power_off)(void) = machine_power_off_smp;
  * Reboot, halt and power_off routines for non SMP.
  */
 extern void reipl(unsigned long devno);
+extern void reipl_diag(void);
 static void do_machine_restart_nonsmp(char * __unused)
 {
+        reipl_diag();
+
         if (MACHINE_IS_VM)
                 cpcmd ("IPL", NULL, 0);
         else
@@ -634,6 +637,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         struct cpuinfo_S390 *cpuinfo;
         unsigned long n = (unsigned long) v - 1;
 
+        preempt_disable();
         if (!n) {
                 seq_printf(m, "vendor_id       : IBM/S390\n"
                                "# processors    : %i\n"
@@ -658,6 +662,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                                cpuinfo->cpu_id.ident,
                                cpuinfo->cpu_id.machine);
         }
+        preempt_enable();
         return 0;
 }
 
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 6a3f5b7473a..6e0110d7119 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -376,8 +376,8 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
         /* Create the ucontext.  */
         err |= __put_user(0, &frame->uc.uc_flags);
-        err |= __put_user(0, &frame->uc.uc_link);
-        err |= __put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+        err |= __put_user(NULL, &frame->uc.uc_link);
+        err |= __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
         err |= __put_user(sas_ss_flags(regs->gprs[15]),
                           &frame->uc.uc_stack.ss_flags);
         err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 85222fee436..e13c87b446b 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -65,6 +65,7 @@ extern char vmhalt_cmd[];
 extern char vmpoff_cmd[];
 
 extern void reipl(unsigned long devno);
+extern void reipl_diag(void);
 
 static void smp_ext_bitcall(int, ec_bit_sig);
 static void smp_ext_bitcall_others(ec_bit_sig);
@@ -283,6 +284,8 @@ static void do_machine_restart(void * __unused)
          * interrupted by an external interrupt and s390irq
          * locks are always held disabled).
          */
+        reipl_diag();
+
         if (MACHINE_IS_VM)
                 cpcmd ("IPL", NULL, 0, NULL);
         else