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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>
158 lines
3.3 KiB
C
158 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* MPIC timer wakeup driver
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*
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* Copyright 2013 Freescale Semiconductor, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <asm/mpic_timer.h>
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#include <asm/mpic.h>
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struct fsl_mpic_timer_wakeup {
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struct mpic_timer *timer;
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struct work_struct free_work;
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};
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static struct fsl_mpic_timer_wakeup *fsl_wakeup;
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static DEFINE_MUTEX(sysfs_lock);
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static void fsl_free_resource(struct work_struct *ws)
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{
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struct fsl_mpic_timer_wakeup *wakeup =
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container_of(ws, struct fsl_mpic_timer_wakeup, free_work);
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mutex_lock(&sysfs_lock);
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if (wakeup->timer) {
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disable_irq_wake(wakeup->timer->irq);
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mpic_free_timer(wakeup->timer);
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}
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wakeup->timer = NULL;
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mutex_unlock(&sysfs_lock);
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}
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static irqreturn_t fsl_mpic_timer_irq(int irq, void *dev_id)
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{
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struct fsl_mpic_timer_wakeup *wakeup = dev_id;
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schedule_work(&wakeup->free_work);
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return wakeup->timer ? IRQ_HANDLED : IRQ_NONE;
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}
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static ssize_t fsl_timer_wakeup_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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time64_t interval = 0;
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mutex_lock(&sysfs_lock);
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if (fsl_wakeup->timer) {
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mpic_get_remain_time(fsl_wakeup->timer, &interval);
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interval++;
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}
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mutex_unlock(&sysfs_lock);
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return sprintf(buf, "%lld\n", interval);
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}
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static ssize_t fsl_timer_wakeup_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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time64_t interval;
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int ret;
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if (kstrtoll(buf, 0, &interval))
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return -EINVAL;
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guard(mutex)(&sysfs_lock);
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if (fsl_wakeup->timer) {
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disable_irq_wake(fsl_wakeup->timer->irq);
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mpic_free_timer(fsl_wakeup->timer);
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fsl_wakeup->timer = NULL;
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}
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if (!interval)
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return count;
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fsl_wakeup->timer = mpic_request_timer(fsl_mpic_timer_irq,
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fsl_wakeup, interval);
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if (!fsl_wakeup->timer)
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return -EINVAL;
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ret = enable_irq_wake(fsl_wakeup->timer->irq);
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if (ret) {
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mpic_free_timer(fsl_wakeup->timer);
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fsl_wakeup->timer = NULL;
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return ret;
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}
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mpic_start_timer(fsl_wakeup->timer);
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return count;
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}
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static struct device_attribute mpic_attributes = __ATTR(timer_wakeup, 0644,
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fsl_timer_wakeup_show, fsl_timer_wakeup_store);
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static int __init fsl_wakeup_sys_init(void)
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{
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struct device *dev_root;
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int ret = -EINVAL;
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fsl_wakeup = kzalloc_obj(struct fsl_mpic_timer_wakeup);
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if (!fsl_wakeup)
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return -ENOMEM;
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INIT_WORK(&fsl_wakeup->free_work, fsl_free_resource);
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dev_root = bus_get_dev_root(&mpic_subsys);
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if (dev_root) {
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ret = device_create_file(dev_root, &mpic_attributes);
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put_device(dev_root);
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if (ret)
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kfree(fsl_wakeup);
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}
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return ret;
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}
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static void __exit fsl_wakeup_sys_exit(void)
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{
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struct device *dev_root;
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dev_root = bus_get_dev_root(&mpic_subsys);
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if (dev_root) {
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device_remove_file(dev_root, &mpic_attributes);
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put_device(dev_root);
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}
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mutex_lock(&sysfs_lock);
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if (fsl_wakeup->timer) {
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disable_irq_wake(fsl_wakeup->timer->irq);
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mpic_free_timer(fsl_wakeup->timer);
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}
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kfree(fsl_wakeup);
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mutex_unlock(&sysfs_lock);
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}
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module_init(fsl_wakeup_sys_init);
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module_exit(fsl_wakeup_sys_exit);
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MODULE_DESCRIPTION("Freescale MPIC global timer wakeup driver");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Wang Dongsheng <dongsheng.wang@freescale.com>");
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