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timer: Clean up timer initializers

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Over time, timer initializers became messy with unnecessarily
duplicated code which are inconsistently spread across timer.h and
timer.c.

This patch cleans up timer initializers.

* timer.c::__init_timer() is renamed to do_init_timer().

* __TIMER_INITIALIZER() added.  It takes @flags and all initializers
  are wrappers around it.

* init_timer[_on_stack]_key() now take @flags.

* __init_timer[_on_stack]() added.  They take @flags and all init
  macros are wrappers around them.

* __setup_timer[_on_stack]() added.  It uses __init_timer() and takes
  @flags.  All setup macros are wrappers around the two.

Note that this patch doesn't add missing init/setup combinations -
e.g. init_timer_deferrable_on_stack().  Adding missing ones is
trivial.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/1344449428-24962-4-git-send-email-tj@kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Tejun Heo
2012-08-08 11:10:27 -07:00
committed by Thomas Gleixner
parent 5a9af38d05
commit fc683995a6
2 changed files with 59 additions and 132 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
kernel/timer.c
View File

@@ -100,11 +100,6 @@ static inline struct tvec_base *tbase_get_base(struct tvec_base *base)
return ((struct tvec_base *)((unsigned long)base & ~TIMER_FLAG_MASK));
}
static inline void timer_set_deferrable(struct timer_list *timer)
{
timer->base = TBASE_MAKE_DEFERRED(timer->base);
}
static inline void
timer_set_base(struct timer_list *timer, struct tvec_base *new_base)
{
@@ -564,16 +559,14 @@ static inline void debug_timer_assert_init(struct timer_list *timer)
debug_object_assert_init(timer, &timer_debug_descr);
}
static void __init_timer(struct timer_list *timer,
const char *name,
struct lock_class_key *key);
static void do_init_timer(struct timer_list *timer, unsigned int flags,
const char *name, struct lock_class_key *key);
void init_timer_on_stack_key(struct timer_list *timer,
const char *name,
struct lock_class_key *key)
void init_timer_on_stack_key(struct timer_list *timer, unsigned int flags,
const char *name, struct lock_class_key *key)
{
debug_object_init_on_stack(timer, &timer_debug_descr);
__init_timer(timer, name, key);
do_init_timer(timer, flags, name, key);
}
EXPORT_SYMBOL_GPL(init_timer_on_stack_key);
@@ -614,12 +607,13 @@ static inline void debug_assert_init(struct timer_list *timer)
debug_timer_assert_init(timer);
}
static void __init_timer(struct timer_list *timer,
const char *name,
struct lock_class_key *key)
static void do_init_timer(struct timer_list *timer, unsigned int flags,
const char *name, struct lock_class_key *key)
{
struct tvec_base *base = __raw_get_cpu_var(tvec_bases);
timer->entry.next = NULL;
timer->base = __raw_get_cpu_var(tvec_bases);
timer->base = (void *)((unsigned long)base | flags);
timer->slack = -1;
#ifdef CONFIG_TIMER_STATS
timer->start_site = NULL;
@@ -629,22 +623,10 @@ static void __init_timer(struct timer_list *timer,
lockdep_init_map(&timer->lockdep_map, name, key, 0);
}
void setup_deferrable_timer_on_stack_key(struct timer_list *timer,
const char *name,
struct lock_class_key *key,
void (*function)(unsigned long),
unsigned long data)
{
timer->function = function;
timer->data = data;
init_timer_on_stack_key(timer, name, key);
timer_set_deferrable(timer);
}
EXPORT_SYMBOL_GPL(setup_deferrable_timer_on_stack_key);
/**
* init_timer_key - initialize a timer
* @timer: the timer to be initialized
* @flags: timer flags
* @name: name of the timer
* @key: lockdep class key of the fake lock used for tracking timer
* sync lock dependencies
@@ -652,24 +634,14 @@ EXPORT_SYMBOL_GPL(setup_deferrable_timer_on_stack_key);
* init_timer_key() must be done to a timer prior calling *any* of the
* other timer functions.
*/
void init_timer_key(struct timer_list *timer,
const char *name,
struct lock_class_key *key)
void init_timer_key(struct timer_list *timer, unsigned int flags,
const char *name, struct lock_class_key *key)
{
debug_init(timer);
__init_timer(timer, name, key);
do_init_timer(timer, flags, name, key);
}
EXPORT_SYMBOL(init_timer_key);
void init_timer_deferrable_key(struct timer_list *timer,
const char *name,
struct lock_class_key *key)
{
init_timer_key(timer, name, key);
timer_set_deferrable(timer);
}
EXPORT_SYMBOL(init_timer_deferrable_key);
static inline void detach_timer(struct timer_list *timer, bool clear_pending)
{
struct list_head *entry = &timer->entry;