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timer: Generalize timer->base flags handling

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To prepare for addition of another flag, generalize timer->base flags
handling.

* Rename from TBASE_*_FLAG to TIMER_* and make them LU constants.

* Define and use TIMER_FLAG_MASK for flags masking so that multiple
  flags can be handled correctly.

* Don't dereference timer->base directly even if
  !tbase_get_deferrable().  All two such places are already passed in
  @base, so use it instead.

* Make sure tvec_base's alignment is large enough for timer->base
  flags using BUILD_BUG_ON().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/1344449428-24962-2-git-send-email-tj@kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Tejun Heo
2012-08-08 11:10:25 -07:00
committed by Thomas Gleixner
parent eec19d1a0d
commit e52b1db37b
2 changed files with 17 additions and 10 deletions
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6
include/linux/timer.h
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@@ -58,7 +58,9 @@ extern struct tvec_base boot_tvec_bases;
* the timer will be serviced when the CPU eventually wakes up with a
* subsequent non-deferrable timer.
*/
#define TBASE_DEFERRABLE_FLAG (0x1)
#define TIMER_DEFERRABLE 0x1LU
#define TIMER_FLAG_MASK 0x1LU
#define TIMER_INITIALIZER(_function, _expires, _data) { \
.entry = { .prev = TIMER_ENTRY_STATIC }, \
@@ -72,7 +74,7 @@ extern struct tvec_base boot_tvec_bases;
}
#define TBASE_MAKE_DEFERRED(ptr) ((struct tvec_base *) \
((unsigned char *)(ptr) + TBASE_DEFERRABLE_FLAG))
((unsigned char *)(ptr) + TIMER_DEFERRABLE))
#define TIMER_DEFERRED_INITIALIZER(_function, _expires, _data) {\
.entry = { .prev = TIMER_ENTRY_STATIC }, \