Pull thermal into release branch

[linux-drm-fsl-dcu.git] / arch / s390 / kernel / traps.c

diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index f0e5a320e2ec4d5e43a94802643bcc722017002e..cbfe73034c30154dd05ca70eb8760dcdd38f7167 100644 (file)
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -22,15 +22,15 @@
 #include <linux/timer.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
-#include <linux/smp_lock.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/module.h>
+#include <linux/kdebug.h>
 #include <linux/kallsyms.h>
 #include <linux/reboot.h>
 #include <linux/kprobes.h>
-
+#include <linux/bug.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -40,7 +40,6 @@
 #include <asm/s390_ext.h>
 #include <asm/lowcore.h>
 #include <asm/debug.h>
-#include <asm/kdebug.h>
 
 /* Called from entry.S only */
 extern void handle_per_exception(struct pt_regs *regs);
@@ -70,20 +69,6 @@ static int kstack_depth_to_print = 12;
 static int kstack_depth_to_print = 20;
 #endif /* CONFIG_64BIT */
 
-ATOMIC_NOTIFIER_HEAD(s390die_chain);
-
-int register_die_notifier(struct notifier_block *nb)
-{
-       return atomic_notifier_chain_register(&s390die_chain, nb);
-}
-EXPORT_SYMBOL(register_die_notifier);
-
-int unregister_die_notifier(struct notifier_block *nb)
-{
-       return atomic_notifier_chain_unregister(&s390die_chain, nb);
-}
-EXPORT_SYMBOL(unregister_die_notifier);
-
 /*
  * For show_trace we have tree different stack to consider:
  *   - the panic stack which is used if the kernel stack has overflown
@@ -188,18 +173,31 @@ void dump_stack(void)
 
 EXPORT_SYMBOL(dump_stack);
 
+static inline int mask_bits(struct pt_regs *regs, unsigned long bits)
+{
+       return (regs->psw.mask & bits) / ((~bits + 1) & bits);
+}
+
 void show_registers(struct pt_regs *regs)
 {
-       mm_segment_t old_fs;
        char *mode;
-       int i;
 
        mode = (regs->psw.mask & PSW_MASK_PSTATE) ? "User" : "Krnl";
        printk("%s PSW : %p %p",
               mode, (void *) regs->psw.mask,
               (void *) regs->psw.addr);
        print_symbol(" (%s)\n", regs->psw.addr & PSW_ADDR_INSN);
-       printk("%s GPRS: " FOURLONG, mode,
+       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),
+              mask_bits(regs, PSW_MASK_EXT), mask_bits(regs, PSW_MASK_KEY),
+              mask_bits(regs, PSW_MASK_MCHECK), mask_bits(regs, PSW_MASK_WAIT),
+              mask_bits(regs, PSW_MASK_PSTATE), mask_bits(regs, PSW_MASK_ASC),
+              mask_bits(regs, PSW_MASK_CC), mask_bits(regs, PSW_MASK_PM));
+#ifdef CONFIG_64BIT
+       printk(" EA:%x", mask_bits(regs, PSW_BASE_BITS));
+#endif
+       printk("\n%s GPRS: " FOURLONG, mode,
               regs->gprs[0], regs->gprs[1], regs->gprs[2], regs->gprs[3]);
        printk("           " FOURLONG,
               regs->gprs[4], regs->gprs[5], regs->gprs[6], regs->gprs[7]);
@@ -208,41 +206,7 @@ void show_registers(struct pt_regs *regs)
        printk("           " FOURLONG,
               regs->gprs[12], regs->gprs[13], regs->gprs[14], regs->gprs[15]);
 
-#if 0
-       /* FIXME: this isn't needed any more but it changes the ksymoops
-        * input. To remove or not to remove ... */
-       save_access_regs(regs->acrs);
-       printk("%s ACRS: %08x %08x %08x %08x\n", mode,
-              regs->acrs[0], regs->acrs[1], regs->acrs[2], regs->acrs[3]);
-       printk("           %08x %08x %08x %08x\n",
-              regs->acrs[4], regs->acrs[5], regs->acrs[6], regs->acrs[7]);
-       printk("           %08x %08x %08x %08x\n",
-              regs->acrs[8], regs->acrs[9], regs->acrs[10], regs->acrs[11]);
-       printk("           %08x %08x %08x %08x\n",
-              regs->acrs[12], regs->acrs[13], regs->acrs[14], regs->acrs[15]);
-#endif
-
-       /*
-        * Print the first 20 byte of the instruction stream at the
-        * time of the fault.
-        */
-       old_fs = get_fs();
-       if (regs->psw.mask & PSW_MASK_PSTATE)
-               set_fs(USER_DS);
-       else
-               set_fs(KERNEL_DS);
-       printk("%s Code: ", mode);
-       for (i = 0; i < 20; i++) {
-               unsigned char c;
-               if (__get_user(c, (char __user *)(regs->psw.addr + i))) {
-                       printk(" Bad PSW.");
-                       break;
-               }
-               printk("%02x ", c);
-       }
-       set_fs(old_fs);
-
-       printk("\n");
+       show_code(regs);
 }      
 
 /* This is called from fs/proc/array.c */
@@ -318,6 +282,11 @@ report_user_fault(long interruption_code, struct pt_regs *regs)
 #endif
 }
 
+int is_valid_bugaddr(unsigned long addr)
+{
+       return 1;
+}
+
 static void __kprobes inline do_trap(long interruption_code, int signr,
                                        char *str, struct pt_regs *regs,
                                        siginfo_t *info)
@@ -344,8 +313,14 @@ static void __kprobes inline do_trap(long interruption_code, int signr,
                 fixup = search_exception_tables(regs->psw.addr & PSW_ADDR_INSN);
                 if (fixup)
                         regs->psw.addr = fixup->fixup | PSW_ADDR_AMODE;
-                else
-                        die(str, regs, interruption_code);
+               else {
+                       enum bug_trap_type btt;
+
+                       btt = report_bug(regs->psw.addr & PSW_ADDR_INSN);
+                       if (btt == BUG_TRAP_TYPE_WARN)
+                               return;
+                       die(str, regs, interruption_code);
+               }
         }
 }