Add a printascii call in the vprintk function

This is useful for initial debugging and when CONFIG_DEBUG_LL is set.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

kernel/printk.c

@@ -504,6 +504,8 @@ asmlinkage int printk(const char *fmt, ...)
 /* cpu currently holding logbuf_lock */
 static volatile unsigned int printk_cpu = UINT_MAX;
 
+extern void printascii(const char *string);
+
 asmlinkage int vprintk(const char *fmt, va_list args)
 {
 	unsigned long flags;
@@ -526,6 +528,9 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 
 	/* Emit the output into the temporary buffer */
 	printed_len = vscnprintf(printk_buf, sizeof(printk_buf), fmt, args);
+#ifdef CONFIG_DEBUG_LL
+	printascii(printk_buf);
+#endif
 
 	/*
 	 * Copy the output into log_buf.  If the caller didn't provide