add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/parisc/led.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *    Chassis LCD/LED driver for HP-PARISC workstations
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  *
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@@ -5,11 +6,6 @@
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  *      (c) Copyright 2000 Helge Deller <hdeller@redhat.com>
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  *      (c) Copyright 2001-2009 Helge Deller <deller@gmx.de>
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  *      (c) Copyright 2001 Randolph Chung <tausq@debian.org>
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- *
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- *      This program is free software; you can redistribute it and/or modify
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- *      it under the terms of the GNU General Public License as published by
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- *      the Free Software Foundation; either version 2 of the License, or
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- *      (at your option) any later version.
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  *
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  * TODO:
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  *	- speed-up calculations with inlined assembler
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@@ -60,8 +56,8 @@
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 static int led_type __read_mostly = -1;
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 static unsigned char lastleds;	/* LED state from most recent update */
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 static unsigned int led_heartbeat __read_mostly = 1;
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-static unsigned int led_diskio    __read_mostly = 1;
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-static unsigned int led_lanrxtx   __read_mostly = 1;
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+static unsigned int led_diskio    __read_mostly;
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+static unsigned int led_lanrxtx   __read_mostly;
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 static char lcd_text[32]          __read_mostly;
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 static char lcd_text_default[32]  __read_mostly;
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 static int  lcd_no_led_support    __read_mostly = 0; /* KittyHawk doesn't support LED on its LCD */
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@@ -141,6 +137,9 @@
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 	/* Create the work queue and queue the LED task */
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 	led_wq = create_singlethread_workqueue("led_wq");	
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+	if (!led_wq)
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+		return -ENOMEM;
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+
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 	queue_delayed_work(led_wq, &led_task, 0);
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 	return 0;
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@@ -234,13 +233,12 @@
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 	return -EINVAL;
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 }
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-static const struct file_operations led_proc_fops = {
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-	.owner		= THIS_MODULE,
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-	.open		= led_proc_open,
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-	.read		= seq_read,
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-	.llseek		= seq_lseek,
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-	.release	= single_release,
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-	.write		= led_proc_write,
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+static const struct proc_ops led_proc_ops = {
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+	.proc_open	= led_proc_open,
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+	.proc_read	= seq_read,
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+	.proc_lseek	= seq_lseek,
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+	.proc_release	= single_release,
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+	.proc_write	= led_proc_write,
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 };
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 static int __init led_create_procfs(void)
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@@ -256,14 +254,14 @@
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 	if (!lcd_no_led_support)
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 	{
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 		ent = proc_create_data("led", S_IRUGO|S_IWUSR, proc_pdc_root,
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-					&led_proc_fops, (void *)LED_NOLCD); /* LED */
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+					&led_proc_ops, (void *)LED_NOLCD); /* LED */
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 		if (!ent) return -1;
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 	}
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 	if (led_type == LED_HASLCD)
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 	{
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 		ent = proc_create_data("lcd", S_IRUGO|S_IWUSR, proc_pdc_root,
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-					&led_proc_fops, (void *)LED_HASLCD); /* LCD */
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+					&led_proc_ops, (void *)LED_HASLCD); /* LCD */
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 		if (!ent) return -1;
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 	}
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