s390/traps: Use pr_emerg() instead of printk()

Use pr_emerg() instead of printk() in case of a stack overflow,
providing the emergency printk level. Also slightly adjust the
printed text for pr_emerg() and panic().

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

Author: hcahca

arch/s390/kernel/traps.c

@@ -271,10 +271,10 @@ void kernel_stack_overflow(struct pt_regs *regs)
 	 */
 	kmsan_unpoison_entry_regs(regs);
 	bust_spinlocks(1);
-	printk("Kernel stack overflow.\n");
+	pr_emerg("Kernel stack overflow\n");
 	show_regs(regs);
 	bust_spinlocks(0);
-	panic("Corrupt kernel stack, can't continue.");
+	panic("Corrupt kernel stack, cannot continue");
 }
 NOKPROBE_SYMBOL(kernel_stack_overflow);