GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-21 22:21:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

alarmtimers: Change alarmtimer functions to return alarmtimer_restart values

Browse source 
In order to properly fix the denial of service issue with high freq
periodic alarm timers, we need to push the re-arming logic into the
alarm timer handler, much as the hrtimer code does.

This patch introduces alarmtimer_restart enum and changes the
alarmtimer handler declarations to use it as a return value. Further,
to ease following changes, it extends the alarmtimer handler functions
to also take the time at expiration. No logic is yet modified.

CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2011-08-10 10:37:59 -07:00
parent 6af7e471e5
commit 4b41308d2d
2 changed files with 16 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

9
include/linux/alarmtimer.h
View file

@ -13,6 +13,11 @@ enum alarmtimer_type {
ALARM_NUMTYPE,
};
enum alarmtimer_restart {
ALARMTIMER_NORESTART,
ALARMTIMER_RESTART,
};
/**
* struct alarm - Alarm timer structure
* @node: timerqueue node for adding to the event list this value
@ -26,14 +31,14 @@ enum alarmtimer_type {
struct alarm {
struct timerqueue_node node;
ktime_t period;
void (*function)(struct alarm *);
enum alarmtimer_restart (*function)(struct alarm *, ktime_t now);
enum alarmtimer_type type;
bool enabled;
void *data;
};
void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
void (*function)(struct alarm *));
enum alarmtimer_restart (*function)(struct alarm *, ktime_t));
void alarm_start(struct alarm *alarm, ktime_t start, ktime_t period);
void alarm_cancel(struct alarm *alarm);