diff --git a/Makefile b/Makefile
index da2b50f..abf66d2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,23 +1,15 @@
 EXTRA_CFLAGS += $(USER_EXTRA_CFLAGS)
 
 ##################### Optimization Flags ##########################
-#EXTRA_CFLAGS += -O1
 EXTRA_CFLAGS += -O2
-#EXTRA_CFLAGS += -O3
 ##################### Compile-time Warnings #######################
-#EXTRA_CFLAGS += -Wall
-#EXTRA_CFLAGS += -Wextra
-#EXTRA_CFLAGS += -Werror
-#EXTRA_CFLAGS += -pedantic
-#EXTRA_CFLAGS += -Wshadow -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-#EXTRA_CFLAGS += -Wno-uninitialized
 EXTRA_CFLAGS += -Wno-unused-variable
 EXTRA_CFLAGS += -Wno-unused-value
 EXTRA_CFLAGS += -Wno-unused-label
 EXTRA_CFLAGS += -Wno-unused-parameter
 EXTRA_CFLAGS += -Wno-unused-function
 EXTRA_CFLAGS += -Wno-unused
-EXTRA_CFLAGS += -Wno-incompatible-pointer-types
+#EXTRA_CFLAGS += -Wno-incompatible-pointer-types
 EXTRA_CFLAGS += -Wno-date-time
 
 GCC_VER_49 := $(shell echo `$(CC) -dumpversion | cut -f1-2 -d.` \>= 4.9 | bc )
diff --git a/os_dep/linux/rtw_proc.c b/os_dep/linux/rtw_proc.c
index 9754a25..1aa1430 100644
--- a/os_dep/linux/rtw_proc.c
+++ b/os_dep/linux/rtw_proc.c
@@ -62,7 +62,12 @@ inline struct proc_dir_entry *rtw_proc_create_dir(const char *name, struct proc_
 }
 
 inline struct proc_dir_entry *rtw_proc_create_entry(const char *name, struct proc_dir_entry *parent,
-	const struct file_operations *fops, void * data)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0))
+	const struct file_operations *fops,
+#else
+	const struct proc_ops *fops,
+#endif
+	void * data)
 {
 	struct proc_dir_entry *entry;
 
@@ -238,6 +243,7 @@ static ssize_t rtw_drv_proc_write(struct file *file, const char __user *buffer,
 	return -EROFS;
 }
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0))
 static const struct file_operations rtw_drv_proc_seq_fops = {
 	.owner = THIS_MODULE,
 	.open = rtw_drv_proc_open,
@@ -255,6 +261,23 @@ static const struct file_operations rtw_drv_proc_sseq_fops = {
 	.release = single_release,
 	.write = rtw_drv_proc_write,
 };
+#else
+static const struct proc_ops rtw_drv_proc_seq_fops = {
+	.proc_open = rtw_drv_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = seq_release,
+	.proc_write = rtw_drv_proc_write,
+};
+
+static const struct proc_ops rtw_drv_proc_sseq_fops = {
+	.proc_open = rtw_drv_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = single_release,
+	.proc_write = rtw_drv_proc_write,
+};
+#endif
 
 int rtw_drv_proc_init(void)
 {
@@ -4146,6 +4169,7 @@ static ssize_t rtw_adapter_proc_write(struct file *file, const char __user *buff
 	return -EROFS;
 }
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0))
 static const struct file_operations rtw_adapter_proc_seq_fops = {
 	.owner = THIS_MODULE,
 	.open = rtw_adapter_proc_open,
@@ -4163,6 +4187,23 @@ static const struct file_operations rtw_adapter_proc_sseq_fops = {
 	.release = single_release,
 	.write = rtw_adapter_proc_write,
 };
+#else
+static const struct proc_ops rtw_adapter_proc_seq_fops = {
+	.proc_open = rtw_adapter_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = seq_release,
+	.proc_write = rtw_adapter_proc_write,
+};
+
+static const struct proc_ops rtw_adapter_proc_sseq_fops = {
+	.proc_open = rtw_adapter_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = single_release,
+	.proc_write = rtw_adapter_proc_write,
+};
+#endif
 
 int proc_get_odm_adaptivity(struct seq_file *m, void *v)
 {
@@ -4315,6 +4356,7 @@ static ssize_t rtw_odm_proc_write(struct file *file, const char __user *buffer,
 	return -EROFS;
 }
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0))
 static const struct file_operations rtw_odm_proc_seq_fops = {
 	.owner = THIS_MODULE,
 	.open = rtw_odm_proc_open,
@@ -4332,6 +4374,23 @@ static const struct file_operations rtw_odm_proc_sseq_fops = {
 	.release = single_release,
 	.write = rtw_odm_proc_write,
 };
+#else
+static const struct proc_ops rtw_odm_proc_seq_fops = {
+	.proc_open = rtw_odm_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = seq_release,
+	.proc_write = rtw_odm_proc_write,
+};
+
+static const struct proc_ops rtw_odm_proc_sseq_fops = {
+	.proc_open = rtw_odm_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = single_release,
+	.proc_write = rtw_odm_proc_write,
+};
+#endif
 
 struct proc_dir_entry *rtw_odm_proc_init(struct net_device *dev)
 {
@@ -4456,6 +4515,7 @@ static ssize_t rtw_mcc_proc_write(struct file *file, const char __user *buffer,
 	return -EROFS;
 }
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0))
 static const struct file_operations rtw_mcc_proc_seq_fops = {
 	.owner = THIS_MODULE,
 	.open = rtw_mcc_proc_open,
@@ -4473,6 +4533,25 @@ static const struct file_operations rtw_mcc_proc_sseq_fops = {
 	.release = single_release,
 	.write = rtw_mcc_proc_write,
 };
+#else
+static const struct proc_ops rtw_mcc_proc_seq_fops = {
+	.proc_owner = THIS_MODULE,
+	.proc_open = rtw_mcc_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = seq_release,
+	.proc_write = rtw_mcc_proc_write,
+};
+
+static const struct proc_ops rtw_mcc_proc_sseq_fops = {
+	.proc_owner = THIS_MODULE,
+	.proc_open = rtw_mcc_proc_open,
+	.proc_read = seq_read,
+	.proc_lseek = seq_lseek,
+	.proc_release = single_release,
+	.proc_write = rtw_mcc_proc_write,
+};
+#endif
 
 struct proc_dir_entry *rtw_mcc_proc_init(struct net_device *dev)
 {