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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-14 04:56:58 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-14 04:56:58 +0300
commit2bcc673101268dc50e52b83226c5bbf38391e16d (patch)
tree0cdaf6affa8b05d436c2e8b80ff23e8c7f03a30a /include/linux/timer.h
parent670310dfbae0eefe7318ff6a61e29e67a7a7bbce (diff)
parentb24591e2fcf852ad7ad2ccf745c8220bf378d312 (diff)
downloadlinux-2bcc673101268dc50e52b83226c5bbf38391e16d.tar.xz
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner: "Yet another big pile of changes: - More year 2038 work from Arnd slowly reaching the point where we need to think about the syscalls themself. - A new timer function which allows to conditionally (re)arm a timer only when it's either not running or the new expiry time is sooner than the armed expiry time. This allows to use a single timer for multiple timeout requirements w/o caring about the first expiry time at the call site. - A new NMI safe accessor to clock real time for the printk timestamp work. Can be used by tracing, perf as well if required. - A large number of timer setup conversions from Kees which got collected here because either maintainers requested so or they simply got ignored. As Kees pointed out already there are a few trivial merge conflicts and some redundant commits which was unavoidable due to the size of this conversion effort. - Avoid a redundant iteration in the timer wheel softirq processing. - Provide a mechanism to treat RTC implementations depending on their hardware properties, i.e. don't inflict the write at the 0.5 seconds boundary which originates from the PC CMOS RTC to all RTCs. No functional change as drivers need to be updated separately. - The usual small updates to core code clocksource drivers. Nothing really exciting" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (111 commits) timers: Add a function to start/reduce a timer pstore: Use ktime_get_real_fast_ns() instead of __getnstimeofday() timer: Prepare to change all DEFINE_TIMER() callbacks netfilter: ipvs: Convert timers to use timer_setup() scsi: qla2xxx: Convert timers to use timer_setup() block/aoe: discover_timer: Convert timers to use timer_setup() ide: Convert timers to use timer_setup() drbd: Convert timers to use timer_setup() mailbox: Convert timers to use timer_setup() crypto: Convert timers to use timer_setup() drivers/pcmcia: omap1: Fix error in automated timer conversion ARM: footbridge: Fix typo in timer conversion drivers/sgi-xp: Convert timers to use timer_setup() drivers/pcmcia: Convert timers to use timer_setup() drivers/memstick: Convert timers to use timer_setup() drivers/macintosh: Convert timers to use timer_setup() hwrng/xgene-rng: Convert timers to use timer_setup() auxdisplay: Convert timers to use timer_setup() sparc/led: Convert timers to use timer_setup() mips: ip22/32: Convert timers to use timer_setup() ...
Diffstat (limited to 'include/linux/timer.h')
-rw-r--r--include/linux/timer.h57
1 files changed, 30 insertions, 27 deletions
diff --git a/include/linux/timer.h b/include/linux/timer.h
index ac66f29c6916..bf781acfc6d8 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -64,31 +64,21 @@ struct timer_list {
#define TIMER_TRACE_FLAGMASK (TIMER_MIGRATING | TIMER_DEFERRABLE | TIMER_PINNED | TIMER_IRQSAFE)
-#define __TIMER_INITIALIZER(_function, _expires, _data, _flags) { \
+#define TIMER_DATA_TYPE unsigned long
+#define TIMER_FUNC_TYPE void (*)(TIMER_DATA_TYPE)
+
+#define __TIMER_INITIALIZER(_function, _data, _flags) { \
.entry = { .next = TIMER_ENTRY_STATIC }, \
.function = (_function), \
- .expires = (_expires), \
.data = (_data), \
.flags = (_flags), \
__TIMER_LOCKDEP_MAP_INITIALIZER( \
__FILE__ ":" __stringify(__LINE__)) \
}
-#define TIMER_INITIALIZER(_function, _expires, _data) \
- __TIMER_INITIALIZER((_function), (_expires), (_data), 0)
-
-#define TIMER_PINNED_INITIALIZER(_function, _expires, _data) \
- __TIMER_INITIALIZER((_function), (_expires), (_data), TIMER_PINNED)
-
-#define TIMER_DEFERRED_INITIALIZER(_function, _expires, _data) \
- __TIMER_INITIALIZER((_function), (_expires), (_data), TIMER_DEFERRABLE)
-
-#define TIMER_PINNED_DEFERRED_INITIALIZER(_function, _expires, _data) \
- __TIMER_INITIALIZER((_function), (_expires), (_data), TIMER_DEFERRABLE | TIMER_PINNED)
-
-#define DEFINE_TIMER(_name, _function, _expires, _data) \
+#define DEFINE_TIMER(_name, _function) \
struct timer_list _name = \
- TIMER_INITIALIZER(_function, _expires, _data)
+ __TIMER_INITIALIZER((TIMER_FUNC_TYPE)_function, 0, 0)
void init_timer_key(struct timer_list *timer, unsigned int flags,
const char *name, struct lock_class_key *key);
@@ -129,14 +119,6 @@ static inline void init_timer_on_stack_key(struct timer_list *timer,
#define init_timer(timer) \
__init_timer((timer), 0)
-#define init_timer_pinned(timer) \
- __init_timer((timer), TIMER_PINNED)
-#define init_timer_deferrable(timer) \
- __init_timer((timer), TIMER_DEFERRABLE)
-#define init_timer_pinned_deferrable(timer) \
- __init_timer((timer), TIMER_DEFERRABLE | TIMER_PINNED)
-#define init_timer_on_stack(timer) \
- __init_timer_on_stack((timer), 0)
#define __setup_timer(_timer, _fn, _data, _flags) \
do { \
@@ -169,9 +151,7 @@ static inline void init_timer_on_stack_key(struct timer_list *timer,
#define setup_pinned_deferrable_timer_on_stack(timer, fn, data) \
__setup_timer_on_stack((timer), (fn), (data), TIMER_DEFERRABLE | TIMER_PINNED)
-#define TIMER_DATA_TYPE unsigned long
-#define TIMER_FUNC_TYPE void (*)(TIMER_DATA_TYPE)
-
+#ifndef CONFIG_LOCKDEP
static inline void timer_setup(struct timer_list *timer,
void (*callback)(struct timer_list *),
unsigned int flags)
@@ -180,6 +160,28 @@ static inline void timer_setup(struct timer_list *timer,
(TIMER_DATA_TYPE)timer, flags);
}
+static inline void timer_setup_on_stack(struct timer_list *timer,
+ void (*callback)(struct timer_list *),
+ unsigned int flags)
+{
+ __setup_timer_on_stack(timer, (TIMER_FUNC_TYPE)callback,
+ (TIMER_DATA_TYPE)timer, flags);
+}
+#else
+/*
+ * Under LOCKDEP, the timer lock_class_key (set up in __init_timer) needs
+ * to be tied to the caller's context, so an inline (above) won't work. We
+ * do want to keep the inline for argument type checking, though.
+ */
+# define timer_setup(timer, callback, flags) \
+ __setup_timer((timer), (TIMER_FUNC_TYPE)(callback), \
+ (TIMER_DATA_TYPE)(timer), (flags))
+# define timer_setup_on_stack(timer, callback, flags) \
+ __setup_timer_on_stack((timer), \
+ (TIMER_FUNC_TYPE)(callback), \
+ (TIMER_DATA_TYPE)(timer), (flags))
+#endif
+
#define from_timer(var, callback_timer, timer_fieldname) \
container_of(callback_timer, typeof(*var), timer_fieldname)
@@ -202,6 +204,7 @@ extern void add_timer_on(struct timer_list *timer, int cpu);
extern int del_timer(struct timer_list * timer);
extern int mod_timer(struct timer_list *timer, unsigned long expires);
extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
+extern int timer_reduce(struct timer_list *timer, unsigned long expires);
/*
* The jiffies value which is added to now, when there is no timer