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/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
*
* wrapper/timer.h
*
* wrapper around linux/timer.h.
*
* Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
*/
#ifndef _LTTNG_WRAPPER_TIMER_H
#define _LTTNG_WRAPPER_TIMER_H
#include <lttng/kernel-version.h>
#include <linux/timer.h>
/*
* In the olden days, pinned timers were initialized normaly with init_timer()
* and then modified with mod_timer_pinned().
*
* Then came kernel 4.8.0 and they had to be initilized as pinned with
* init_timer_pinned() and then modified as regular timers with mod_timer().
*
* Then came kernel 4.15.0 with a new timer API where init_timer() is no more.
* It's replaced by timer_setup() where pinned is now part of timer flags.
*/
static inline int lttng_timer_delete_sync(struct timer_list *timer)
{
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,15,0))
return timer_delete_sync(timer);
#else
return del_timer_sync(timer);
#endif
}
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,16,0))
#define lttng_timer_container_of(var, callback_timer, timer_fieldname) \
timer_container_of(var, callback_timer, timer_fieldname)
#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0))
#define lttng_timer_container_of(var, callback_timer, timer_fieldname) \
from_timer(var, callback_timer, timer_fieldname)
#else
/* timer_fieldname is unused prior to 4.15. */
#define lttng_timer_container_of(var, timer_data, timer_fieldname) \
((typeof(var))timer_data)
#endif
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0))
#define LTTNG_TIMER_PINNED TIMER_PINNED
#define LTTNG_TIMER_FUNC_ARG_TYPE struct timer_list *
#define lttng_mod_timer_pinned(timer, expires) \
mod_timer(timer, expires)
#define lttng_timer_setup(timer, callback, flags, unused) \
timer_setup(timer, callback, flags)
#else /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0) */
# if (LTTNG_RT_VERSION_CODE >= LTTNG_RT_KERNEL_VERSION(4,6,4,8) \
|| LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,8,0))
#define lttng_init_timer_pinned(timer) \
init_timer_pinned(timer)
#define lttng_mod_timer_pinned(timer, expires) \
mod_timer(timer, expires)
# else /* LTTNG_RT_VERSION_CODE >= LTTNG_RT_KERNEL_VERSION(4,6,4,8) */
#define lttng_init_timer_pinned(timer) \
init_timer(timer)
#define lttng_mod_timer_pinned(timer, expires) \
mod_timer_pinned(timer, expires)
# endif /* LTTNG_RT_VERSION_CODE >= LTTNG_RT_KERNEL_VERSION(4,6,4,8) */
#define LTTNG_TIMER_PINNED TIMER_PINNED
#define LTTNG_TIMER_FUNC_ARG_TYPE unsigned long
static inline void lttng_timer_setup(struct timer_list *timer,
void (*function)(LTTNG_TIMER_FUNC_ARG_TYPE),
unsigned int flags, void *data)
{
if (flags & LTTNG_TIMER_PINNED)
lttng_init_timer_pinned(timer);
else
init_timer(timer);
timer->function = function;
timer->data = (unsigned long)data;
}
#endif /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0) */
#endif /* _LTTNG_WRAPPER_TIMER_H */
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