sw64: rename dik_* methods

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I56OLG

--------------------------------

Since die_if_kernel() has been removed, the prefix `dik_` is not
appropriate. Remove this prefix and simplify the implementation
if there is no one to forward the exception to.
Signed-off-by: NWu Liliu <wuliliu@wxiat.com>
Signed-off-by: NGu Zitao <guzitao@wxiat.com>

arch/sw_64/kernel/process.c

@@ -102,17 +102,6 @@ void machine_power_off(void)
 }
 
 
-/* Used by sysrq-p, among others.  I don't believe r9-r15 are ever
- * saved in the context it's used.
- */
-
-void
-show_regs(struct pt_regs *regs)
-{
-	show_regs_print_info(KERN_DEFAULT);
-	dik_show_regs(regs);
-}
-
 /*
  * Re-start a thread when doing execve()
  */

arch/sw_64/kernel/proto.h

@@ -12,7 +12,7 @@ extern int ptrace_set_bpt(struct task_struct *child);
 extern int ptrace_cancel_bpt(struct task_struct *child);
 
 /* traps.c */
-extern void dik_show_regs(struct pt_regs *regs);
+extern void show_regs(struct pt_regs *regs);
 extern void die(char *str, struct pt_regs *regs, long err);
 
 /* timer.c */

arch/sw_64/kernel/ptrace.c

@@ -487,7 +487,7 @@ int do_match(unsigned long address, unsigned long mmcsr, long cause, struct pt_r
 	case MMCSR__DA_MATCH:
 	case MMCSR__DV_MATCH:
 	case MMCSR__DAV_MATCH:
-		dik_show_regs(regs);
+		show_regs(regs);
 
 		if (!(current->ptrace & PT_PTRACED)) {
 			printk(" pid %d %s not be ptraced, return\n", current->pid, current->comm);

arch/sw_64/kernel/traps.c

@@ -31,8 +31,10 @@
 
 #include "proto.h"
 
-void dik_show_regs(struct pt_regs *regs)
+void show_regs(struct pt_regs *regs)
 {
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("pc = [<%016lx>]  ra = [<%016lx>]  ps = %04lx    %s\n",
 	       regs->pc, regs->r26, regs->ps, print_tainted());
 	printk("pc is at %pSR\n", (void *)regs->pc);
@@ -62,8 +64,7 @@ void dik_show_regs(struct pt_regs *regs)
 	printk("gp = %016lx  sp = %p\n", regs->gp, regs+1);
 }
 
-static void
-dik_show_code(unsigned int *pc)
+static void show_code(unsigned int *pc)
 {
 	long i;
 	unsigned int insn;
@@ -93,15 +94,11 @@ void die(char *str, struct pt_regs *regs, long err)
 
 	pr_emerg("%s [#%d]\n", str, ++die_counter);
 
-#ifdef CONFIG_SMP
-	printk("CPU %d ", hard_smp_processor_id());
-#endif
-	printk("%s(%d): %s %ld\n", current->comm, task_pid_nr(current), str, err);
-
 	ret = notify_die(DIE_OOPS, str, regs, err, 0, SIGSEGV);
 
 	print_modules();
-	dik_show_regs(regs);
+	show_regs(regs);
+	show_code((unsigned int *)regs->pc);
 	show_stack(current, NULL, KERN_EMERG);
 
 	bust_spinlocks(0);
@@ -508,21 +505,7 @@ do_entUna(void *va, unsigned long opcode, unsigned long reg,
 	 * Since the registers are in a weird format, dump them ourselves.
 	 */
 
-	printk("%s(%d): unhandled unaligned exception\n",
-	       current->comm, task_pid_nr(current));
-
-	dik_show_regs(regs);
-	dik_show_code((unsigned int *)pc);
-	show_stack(current, NULL, KERN_EMERG);
-
-	if (test_and_set_thread_flag(TIF_DIE_IF_KERNEL)) {
-		printk("die_if_kernel recursion detected.\n");
-		local_irq_enable();
-		while (1)
-			asm("nop");
-	}
-	do_exit(SIGSEGV);
-
+	die("Unhandled unaligned exception", regs, error);
 }
 
 /*

arch/sw_64/mm/fault.c

@@ -32,7 +32,7 @@ static inline int notify_page_fault(struct pt_regs *regs, unsigned long mmcsr)
 #endif
 
 extern void die(char *, struct pt_regs *, long);
-extern void dik_show_regs(struct pt_regs *regs);
+extern void show_regs(struct pt_regs *regs);
 
 void show_all_vma(void)
 {
@@ -325,7 +325,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
 	if (unlikely(segv_debug_enabled)) {
 		pr_info("fault: want to send_segv: pid %d, cause = %#lx, mmcsr = %#lx, address = %#lx, pc %#lx\n",
 				current->pid, cause, mmcsr, address, regs->pc);
-		dik_show_regs(regs);
+		show_regs(regs);
 		show_all_vma();
 	}