From 319e10522598427b350852f576b207aed91f5a41 Mon Sep 17 00:00:00 2001
From: ChenXiaoSong <chenxiaosong@kylinos.cn>
Date: Thu, 1 May 2025 19:08:00 +0800
Subject: [PATCH] mydebug: 4.19

Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
---
 Makefile          |  2 +-
 mydebug/mydebug.c | 33 ++++++++++++++++++++-------------
 2 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/Makefile b/Makefile
index 8df76f9b0712..acba740eb012 100644
--- a/Makefile
+++ b/Makefile
@@ -1000,7 +1000,7 @@ endif
 PHONY += prepare0
 
 ifeq ($(KBUILD_EXTMOD),)
-core-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
+core-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ mydebug/
 
 vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
diff --git a/mydebug/mydebug.c b/mydebug/mydebug.c
index dee1c13fd282..9e1c971cd8a7 100644
--- a/mydebug/mydebug.c
+++ b/mydebug/mydebug.c
@@ -12,15 +12,16 @@
  */
 
 #include <linux/module.h>
-#include <linux/device/class.h>
 #include <linux/stacktrace.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
 #include <mydebug.h>
 
 int mydebug_on_types = MYDEBUG_ON_PRINT;
 EXPORT_SYMBOL(mydebug_on_types);
 
-static ssize_t debug_show(const struct class *class,
-	const struct class_attribute *attr, char *buf)
+static ssize_t debug_show(struct class *class,
+	struct class_attribute *attr, char *buf)
 {
 	ssize_t sz = 0;
 	int i, pos = 0;
@@ -35,7 +36,7 @@ static ssize_t debug_show(const struct class *class,
 	return sz;
 }
 
-static ssize_t debug_store(const struct class *class, const struct class_attribute *attr,
+static ssize_t debug_store(struct class *class, struct class_attribute *attr,
 			   const char *buf, size_t len)
 {
 	int i;
@@ -79,25 +80,31 @@ struct class mydebug_ctrl_class = {
 #define MAX_LINES_PER_STACK	64 // 每个栈最大的行数
 static unsigned long stack_lines[MAX_LINES_PER_STACK];
 
-static void mydebug_stack_trace_print(const unsigned long *entries,
-				      unsigned int nr_entries,
-				      int spaces)
+void mydebug_print_stack_trace(struct stack_trace *trace, int spaces)
 {
-	unsigned int i;
+	int i;
 
-	if (WARN_ON(!entries))
+	if (WARN_ON(!trace->entries))
 		return;
 
-	for (i = 0; i < nr_entries; i++)
-		trace_printk("%*c%pS\n", 1 + spaces, ' ', (void *)entries[i]);
+	for (i = 0; i < trace->nr_entries; i++)
+		trace_printk("%*c%pS\n", 1 + spaces, ' ', (void *)trace->entries[i]);
 }
 
 void mydebug_dump_stack(void)
 {
 	unsigned int trace_len;
-	trace_len = stack_trace_save(stack_lines, MAX_LINES_PER_STACK, 0);
+	struct stack_trace trace;
+
+	trace.max_entries = MAX_LINES_PER_STACK;
+	trace.nr_entries = 0;
+	trace.entries = stack_lines;
+	trace.skip = 0;
+	save_stack_trace(&trace);
+	trace_len = trace.nr_entries;
+
 	trace_printk("comm:%s, pid:%d\n", current->comm, current->pid);
-	mydebug_stack_trace_print(stack_lines, trace_len, 0);
+	mydebug_print_stack_trace(&trace, 0);
 	trace_printk("\n");
 }
 EXPORT_SYMBOL(mydebug_dump_stack);
-- 
2.34.1