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2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/microblaze/kernel/unwind.c
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@@ -154,7 +154,8 @@
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 static void microblaze_unwind_inner(struct task_struct *task,
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 				    unsigned long pc, unsigned long fp,
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 				    unsigned long leaf_return,
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-				    struct stack_trace *trace);
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+				    struct stack_trace *trace,
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+				    const char *loglvl);
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 /**
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  * unwind_trap - Unwind through a system trap, that stored previous state
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@@ -162,16 +163,18 @@
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  */
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 #ifdef CONFIG_MMU
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 static inline void unwind_trap(struct task_struct *task, unsigned long pc,
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-				unsigned long fp, struct stack_trace *trace)
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+				unsigned long fp, struct stack_trace *trace,
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+				const char *loglvl)
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 {
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 	/* To be implemented */
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 }
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 #else
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 static inline void unwind_trap(struct task_struct *task, unsigned long pc,
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-				unsigned long fp, struct stack_trace *trace)
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+				unsigned long fp, struct stack_trace *trace,
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+				const char *loglvl)
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 {
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 	const struct pt_regs *regs = (const struct pt_regs *) fp;
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-	microblaze_unwind_inner(task, regs->pc, regs->r1, regs->r15, trace);
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+	microblaze_unwind_inner(task, regs->pc, regs->r1, regs->r15, trace, loglvl);
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 }
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 #endif
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@@ -184,11 +187,13 @@
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  *				  the caller's return address.
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  * @trace : Where to store stack backtrace (PC values).
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  *	    NULL == print backtrace to kernel log
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+ * @loglvl : Used for printk log level if (trace == NULL).
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  */
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 static void microblaze_unwind_inner(struct task_struct *task,
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 			     unsigned long pc, unsigned long fp,
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 			     unsigned long leaf_return,
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-			     struct stack_trace *trace)
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+			     struct stack_trace *trace,
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+			     const char *loglvl)
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 {
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 	int ofs = 0;
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@@ -214,11 +219,11 @@
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 			const struct pt_regs *regs =
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 				(const struct pt_regs *) fp;
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 #endif
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-			pr_info("HW EXCEPTION\n");
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+			printk("%sHW EXCEPTION\n", loglvl);
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 #ifndef CONFIG_MMU
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 			microblaze_unwind_inner(task, regs->r17 - 4,
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 						fp + EX_HANDLER_STACK_SIZ,
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-						regs->r15, trace);
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+						regs->r15, trace, loglvl);
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 #endif
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 			return;
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 		}
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@@ -228,8 +233,8 @@
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 			if ((return_to >= handler->start_addr)
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 			    && (return_to <= handler->end_addr)) {
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 				if (!trace)
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-					pr_info("%s\n", handler->trap_name);
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-				unwind_trap(task, pc, fp, trace);
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+					printk("%s%s\n", loglvl, handler->trap_name);
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+				unwind_trap(task, pc, fp, trace, loglvl);
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 				return;
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 			}
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 		}
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@@ -248,13 +253,13 @@
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 		} else {
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 			/* Have we reached userland? */
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 			if (unlikely(pc == task_pt_regs(task)->pc)) {
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-				pr_info("[<%p>] PID %lu [%s]\n",
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-					(void *) pc,
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+				printk("%s[<%p>] PID %lu [%s]\n",
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+					loglvl, (void *) pc,
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 					(unsigned long) task->pid,
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 					task->comm);
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 				break;
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 			} else
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-				print_ip_sym(pc);
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+				print_ip_sym(loglvl, pc);
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 		}
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 		/* Stop when we reach anything not part of the kernel */
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@@ -282,14 +287,16 @@
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  * @task  : Task whose stack we are to unwind (NULL == current)
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  * @trace : Where to store stack backtrace (PC values).
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  *	    NULL == print backtrace to kernel log
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+ * @loglvl : Used for printk log level if (trace == NULL).
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  */
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-void microblaze_unwind(struct task_struct *task, struct stack_trace *trace)
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+void microblaze_unwind(struct task_struct *task, struct stack_trace *trace,
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+		       const char *loglvl)
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 {
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 	if (task) {
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 		if (task == current) {
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 			const struct pt_regs *regs = task_pt_regs(task);
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 			microblaze_unwind_inner(task, regs->pc, regs->r1,
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-						regs->r15, trace);
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+						regs->r15, trace, loglvl);
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 		} else {
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 			struct thread_info *thread_info =
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 				(struct thread_info *)(task->stack);
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@@ -299,7 +306,8 @@
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 			microblaze_unwind_inner(task,
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 						(unsigned long) &_switch_to,
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 						cpu_context->r1,
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-						cpu_context->r15, trace);
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+						cpu_context->r15,
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+						trace, loglvl);
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 		}
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 	} else {
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 		unsigned long pc, fp;
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@@ -314,7 +322,7 @@
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 		);
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 		/* Since we are not a leaf function, use leaf_return = 0 */
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-		microblaze_unwind_inner(current, pc, fp, 0, trace);
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+		microblaze_unwind_inner(current, pc, fp, 0, trace, loglvl);
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 	}
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 }
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