Pull video into test 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 66375a5e3d12f0d11020f4465afa97a7084452e8..3cbb0dcf1f1dc845d744077c95c416796e85ddb0 100644 (file)
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -58,12 +58,6 @@ int sysctl_userprocess_debug = 0;
 
 extern pgm_check_handler_t do_protection_exception;
 extern pgm_check_handler_t do_dat_exception;
-#ifdef CONFIG_PFAULT
-extern int pfault_init(void);
-extern void pfault_fini(void);
-extern void pfault_interrupt(__u16 error_code);
-static ext_int_info_t ext_int_pfault;
-#endif
 extern pgm_check_handler_t do_monitor_call;
 
 #define stack_pointer ({ void **sp; asm("la %0,0(15)" : "=&d" (sp)); sp; })
@@ -135,7 +129,7 @@ __show_trace(unsigned long sp, unsigned long low, unsigned long high)
        }
 }
 
-void show_trace(struct task_struct *task, unsigned long * stack)
+void show_trace(struct task_struct *task, unsigned long *stack)
 {
        register unsigned long __r15 asm ("15");
        unsigned long sp;
@@ -157,6 +151,9 @@ void show_trace(struct task_struct *task, unsigned long * stack)
                __show_trace(sp, S390_lowcore.thread_info,
                             S390_lowcore.thread_info + THREAD_SIZE);
        printk("\n");
+       if (!task)
+               task = current;
+       debug_show_held_locks(task);
 }
 
 void show_stack(struct task_struct *task, unsigned long *sp)
@@ -462,7 +459,8 @@ asmlinkage void illegal_op(struct pt_regs * regs, long interruption_code)
                local_irq_enable();
 
        if (regs->psw.mask & PSW_MASK_PSTATE) {
-               get_user(*((__u16 *) opcode), (__u16 __user *) location);
+               if (get_user(*((__u16 *) opcode), (__u16 __user *) location))
+                       return;
                if (*((__u16 *) opcode) == S390_BREAKPOINT_U16) {
                        if (current->ptrace & PT_PTRACED)
                                force_sig(SIGTRAP, current);
@@ -470,20 +468,25 @@ asmlinkage void illegal_op(struct pt_regs * regs, long interruption_code)
                                signal = SIGILL;
 #ifdef CONFIG_MATHEMU
                } else if (opcode[0] == 0xb3) {
-                       get_user(*((__u16 *) (opcode+2)), location+1);
+                       if (get_user(*((__u16 *) (opcode+2)), location+1))
+                               return;
                        signal = math_emu_b3(opcode, regs);
                 } else if (opcode[0] == 0xed) {
-                       get_user(*((__u32 *) (opcode+2)),
-                                (__u32 __user *)(location+1));
+                       if (get_user(*((__u32 *) (opcode+2)),
+                                    (__u32 __user *)(location+1)))
+                               return;
                        signal = math_emu_ed(opcode, regs);
                } else if (*((__u16 *) opcode) == 0xb299) {
-                       get_user(*((__u16 *) (opcode+2)), location+1);
+                       if (get_user(*((__u16 *) (opcode+2)), location+1))
+                               return;
                        signal = math_emu_srnm(opcode, regs);
                } else if (*((__u16 *) opcode) == 0xb29c) {
-                       get_user(*((__u16 *) (opcode+2)), location+1);
+                       if (get_user(*((__u16 *) (opcode+2)), location+1))
+                               return;
                        signal = math_emu_stfpc(opcode, regs);
                } else if (*((__u16 *) opcode) == 0xb29d) {
-                       get_user(*((__u16 *) (opcode+2)), location+1);
+                       if (get_user(*((__u16 *) (opcode+2)), location+1))
+                               return;
                        signal = math_emu_lfpc(opcode, regs);
 #endif
                } else
@@ -733,22 +736,5 @@ void __init trap_init(void)
         pgm_check_table[0x1C] = &space_switch_exception;
         pgm_check_table[0x1D] = &hfp_sqrt_exception;
        pgm_check_table[0x40] = &do_monitor_call;
-
-       if (MACHINE_IS_VM) {
-#ifdef CONFIG_PFAULT
-               /*
-                * Try to get pfault pseudo page faults going.
-                */
-               if (register_early_external_interrupt(0x2603, pfault_interrupt,
-                                                     &ext_int_pfault) != 0)
-                       panic("Couldn't request external interrupt 0x2603");
-
-               if (pfault_init() == 0) 
-                       return;
-               
-               /* Tough luck, no pfault. */
-               unregister_early_external_interrupt(0x2603, pfault_interrupt,
-                                                   &ext_int_pfault);
-#endif
-       }
+       pfault_irq_init();
 }