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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Backlight emulation LED trigger
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*
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* Copyright 2008 (C) Rodolfo Giometti <giometti@linux.it>
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* Copyright 2008 (C) Eurotech S.p.A. <info@eurotech.it>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/leds.h>
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#include "../leds.h"
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#define BLANK 1
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#define UNBLANK 0
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struct bl_trig_notifier {
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struct led_classdev *led;
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int brightness;
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int old_status;
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unsigned invert;
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struct list_head entry;
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};
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static DEFINE_MUTEX(ledtrig_backlight_list_mutex);
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static LIST_HEAD(ledtrig_backlight_list);
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static void ledtrig_backlight_notify_blank(struct bl_trig_notifier *n, int new_status)
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{
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struct led_classdev *led = n->led;
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if (new_status == n->old_status)
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return;
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if ((n->old_status == UNBLANK) ^ n->invert) {
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n->brightness = led->brightness;
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led_set_brightness_nosleep(led, LED_OFF);
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} else {
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led_set_brightness_nosleep(led, n->brightness);
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}
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n->old_status = new_status;
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}
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void ledtrig_backlight_blank(bool blank)
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{
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struct bl_trig_notifier *n;
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int new_status = blank ? BLANK : UNBLANK;
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guard(mutex)(&ledtrig_backlight_list_mutex);
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list_for_each_entry(n, &ledtrig_backlight_list, entry)
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ledtrig_backlight_notify_blank(n, new_status);
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}
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EXPORT_SYMBOL(ledtrig_backlight_blank);
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static ssize_t bl_trig_invert_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct bl_trig_notifier *n = led_trigger_get_drvdata(dev);
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return sprintf(buf, "%u\n", n->invert);
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}
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static ssize_t bl_trig_invert_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t num)
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{
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struct led_classdev *led = led_trigger_get_led(dev);
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struct bl_trig_notifier *n = led_trigger_get_drvdata(dev);
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unsigned long invert;
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int ret;
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ret = kstrtoul(buf, 10, &invert);
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if (ret < 0)
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return ret;
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if (invert > 1)
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return -EINVAL;
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n->invert = invert;
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/* After inverting, we need to update the LED. */
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if ((n->old_status == BLANK) ^ n->invert)
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led_set_brightness_nosleep(led, LED_OFF);
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else
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led_set_brightness_nosleep(led, n->brightness);
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return num;
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}
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static DEVICE_ATTR(inverted, 0644, bl_trig_invert_show, bl_trig_invert_store);
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static struct attribute *bl_trig_attrs[] = {
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&dev_attr_inverted.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(bl_trig);
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static int bl_trig_activate(struct led_classdev *led)
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{
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struct bl_trig_notifier *n;
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n = kzalloc_obj(struct bl_trig_notifier);
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if (!n)
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return -ENOMEM;
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led_set_trigger_data(led, n);
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n->led = led;
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n->brightness = led->brightness;
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n->old_status = UNBLANK;
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guard(mutex)(&ledtrig_backlight_list_mutex);
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list_add(&n->entry, &ledtrig_backlight_list);
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return 0;
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}
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static void bl_trig_deactivate(struct led_classdev *led)
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{
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struct bl_trig_notifier *n = led_get_trigger_data(led);
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guard(mutex)(&ledtrig_backlight_list_mutex);
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list_del(&n->entry);
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kfree(n);
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}
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static struct led_trigger bl_led_trigger = {
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.name = "backlight",
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.activate = bl_trig_activate,
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.deactivate = bl_trig_deactivate,
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.groups = bl_trig_groups,
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};
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module_led_trigger(bl_led_trigger);
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MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
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MODULE_DESCRIPTION("Backlight emulation LED trigger");
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MODULE_LICENSE("GPL v2");
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