add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/acpi/proc.c
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@@ -10,26 +10,21 @@
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 #include "sleep.h"
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 #include "internal.h"
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-#define _COMPONENT		ACPI_SYSTEM_COMPONENT
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-
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 /*
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  * this file provides support for:
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  * /proc/acpi/wakeup
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  */
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-ACPI_MODULE_NAME("sleep")
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-
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 static int
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 acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
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 {
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-	struct list_head *node, *next;
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+	struct acpi_device *dev, *tmp;
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 	seq_printf(seq, "Device\tS-state\t  Status   Sysfs node\n");
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 	mutex_lock(&acpi_device_lock);
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-	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
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-		struct acpi_device *dev =
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-		    container_of(node, struct acpi_device, wakeup_list);
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+	list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
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+				 wakeup_list) {
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 		struct acpi_device_physical_node *entry;
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 		if (!dev->wakeup.flags.valid)
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@@ -96,7 +91,7 @@
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 				const char __user * buffer,
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 				size_t count, loff_t * ppos)
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 {
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-	struct list_head *node, *next;
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+	struct acpi_device *dev, *tmp;
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 	char strbuf[5];
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 	char str[5] = "";
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@@ -109,9 +104,8 @@
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 	sscanf(strbuf, "%s", str);
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 	mutex_lock(&acpi_device_lock);
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-	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
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-		struct acpi_device *dev =
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-		    container_of(node, struct acpi_device, wakeup_list);
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+	list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
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+				 wakeup_list) {
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 		if (!dev->wakeup.flags.valid)
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 			continue;
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@@ -136,18 +130,17 @@
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 			   PDE_DATA(inode));
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 }
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-static const struct file_operations acpi_system_wakeup_device_fops = {
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-	.owner = THIS_MODULE,
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-	.open = acpi_system_wakeup_device_open_fs,
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-	.read = seq_read,
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-	.write = acpi_system_write_wakeup_device,
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-	.llseek = seq_lseek,
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-	.release = single_release,
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+static const struct proc_ops acpi_system_wakeup_device_proc_ops = {
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+	.proc_open	= acpi_system_wakeup_device_open_fs,
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+	.proc_read	= seq_read,
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+	.proc_write	= acpi_system_write_wakeup_device,
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+	.proc_lseek	= seq_lseek,
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+	.proc_release	= single_release,
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 };
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 void __init acpi_sleep_proc_init(void)
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 {
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 	/* 'wakeup device' [R/W] */
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 	proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
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-		    acpi_root_dir, &acpi_system_wakeup_device_fops);
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+		    acpi_root_dir, &acpi_system_wakeup_device_proc_ops);
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 }