6 files changed, 40 insertions, 21 deletions

diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c
index 824c39dfddfc..45cdb37aa6f8 100644
--- a/arch/s390/kernel/compat_wrapper.c
+++ b/arch/s390/kernel/compat_wrapper.c
@@ -1,5 +1,5 @@
 /*
- *  Compat sytem call wrappers.
+ *  Compat system call wrappers.
  *
  *    Copyright IBM Corp. 2014
  */
@@ -213,3 +213,4 @@ COMPAT_SYSCALL_WRAP5(kcmp, pid_t, pid1, pid_t, pid2, int, type, unsigned long, i
 COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, flags);
 COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
 COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
+COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c
index e6af9406987c..acb412442e5e 100644
--- a/arch/s390/kernel/dumpstack.c
+++ b/arch/s390/kernel/dumpstack.c
@@ -144,10 +144,10 @@ void show_registers(struct pt_regs *regs)
         char *mode;
 
         mode = user_mode(regs) ? "User" : "Krnl";
-        printk("%s PSW : %p %p (%pSR)\n",
-               mode, (void *) regs->psw.mask,
-               (void *) regs->psw.addr,
-               (void *) regs->psw.addr);
+        printk("%s PSW : %p %p", mode, (void *)regs->psw.mask, (void *)regs->psw.addr);
+        if (!user_mode(regs))
+                printk(" (%pSR)", (void *)regs->psw.addr);
+        printk("\n");
         printk("           R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x "
                "P:%x AS:%x CC:%x PM:%x", mask_bits(regs, PSW_MASK_PER),
                mask_bits(regs, PSW_MASK_DAT), mask_bits(regs, PSW_MASK_IO),
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 4ac8fafec95f..1c82619eb4f7 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -64,7 +64,7 @@ void update_cr_regs(struct task_struct *task)
                 if (task->thread.per_flags & PER_FLAG_NO_TE)
                         cr_new &= ~(1UL << 55);
                 if (cr_new != cr)
-                        __ctl_load(cr, 0, 0);
+                        __ctl_load(cr_new, 0, 0);
                 /* Set or clear transaction execution TDC bits 62 and 63. */
                 __ctl_store(cr, 2, 2);
                 cr_new = cr & ~3UL;
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index f70f2489fa5f..88d1ca81e2dd 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -1027,3 +1027,35 @@ void __init setup_arch(char **cmdline_p)
         /* Setup zfcpdump support */
         setup_zfcpdump();
 }
+
+#ifdef CONFIG_32BIT
+static int no_removal_warning __initdata;
+
+static int __init parse_no_removal_warning(char *str)
+{
+        no_removal_warning = 1;
+        return 0;
+}
+__setup("no_removal_warning", parse_no_removal_warning);
+
+static int __init removal_warning(void)
+{
+        if (no_removal_warning)
+                return 0;
+        printk(KERN_ALERT "\n\n");
+        printk(KERN_CONT "Warning - you are using a 31 bit kernel!\n\n");
+        printk(KERN_CONT "We plan to remove 31 bit kernel support from the kernel sources in March 2015.\n");
+        printk(KERN_CONT "Currently we assume that nobody is using the 31 bit kernel on old 31 bit\n");
+        printk(KERN_CONT "hardware anymore. If you think that the code should not be removed and also\n");
+        printk(KERN_CONT "future versions of the Linux kernel should be able to run in 31 bit mode\n");
+        printk(KERN_CONT "please let us know. Please write to:\n");
+        printk(KERN_CONT "linux390@de.ibm.com (mail address) and/or\n");
+        printk(KERN_CONT "linux-s390@vger.kernel.org (mailing list).\n\n");
+        printk(KERN_CONT "Thank you!\n\n");
+        printk(KERN_CONT "If this kernel runs on a 64 bit machine you may consider using a 64 bit kernel.\n");
+        printk(KERN_CONT "This message can be disabled with the \"no_removal_warning\" kernel parameter.\n");
+        schedule_timeout_uninterruptible(300 * HZ);
+        return 0;
+}
+early_initcall(removal_warning);
+#endif
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 512ce1cde2a4..86e65ec3422b 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -82,21 +82,6 @@ DEFINE_MUTEX(smp_cpu_state_mutex);
 /*
  * Signal processor helper functions.
  */
-static inline int __pcpu_sigp(u16 addr, u8 order, u32 parm, u32 *status)
-{
-        register unsigned int reg1 asm ("1") = parm;
-        int cc;
-
-        asm volatile(
-                "       sigp    %1,%2,0(%3)\n"
-                "       ipm     %0\n"
-                "       srl     %0,28\n"
-                : "=d" (cc), "+d" (reg1) : "d" (addr), "a" (order) : "cc");
-        if (status && cc == 1)
-                *status = reg1;
-        return cc;
-}
-
 static inline int __pcpu_sigp_relax(u16 addr, u8 order, u32 parm, u32 *status)
 {
         int cc;
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 542ef488bac1..fe5cdf29a001 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -355,3 +355,4 @@ SYSCALL(sys_kcmp,sys_kcmp,compat_sys_kcmp)
 SYSCALL(sys_finit_module,sys_finit_module,compat_sys_finit_module)
 SYSCALL(sys_sched_setattr,sys_sched_setattr,compat_sys_sched_setattr) /* 345 */
 SYSCALL(sys_sched_getattr,sys_sched_getattr,compat_sys_sched_getattr)
+SYSCALL(sys_renameat2,sys_renameat2,compat_sys_renameat2)