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authorFrederic Weisbecker <fweisbec@gmail.com>2013-06-28 00:06:42 +0000
committerFrederic Weisbecker <fweisbec@gmail.com>2013-07-03 16:18:37 +0200
commit1a7fa510b38e518d11365883934f1afa41625424 (patch)
tree0eeb70e41e8416e58aa99a2c68cd3e8735cf2b50 /kernel
parent55ccb616a6e42052edb37e9c4f82cf8854a59429 (diff)
posix_cpu_timers: consolidate timer list cleanups
Cleaning up the posix cpu timers on task exit shares some common code among timer list types, most notably the list traversal and expiry time update. Unify this in a common helper. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com> Cc: Olivier Langlois <olivier@trillion01.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/posix-cpu-timers.c48
1 files changed, 19 insertions, 29 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index c3c4ea1225a..b1450cee6d6 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -399,6 +399,21 @@ static int posix_cpu_timer_del(struct k_itimer *timer)
return ret;
}
+static void cleanup_timers_list(struct list_head *head,
+ unsigned long long curr)
+{
+ struct cpu_timer_list *timer, *next;
+
+ list_for_each_entry_safe(timer, next, head, entry) {
+ list_del_init(&timer->entry);
+ if (timer->expires < curr) {
+ timer->expires = 0;
+ } else {
+ timer->expires -= curr;
+ }
+ }
+}
+
/*
* Clean out CPU timers still ticking when a thread exited. The task
* pointer is cleared, and the expiry time is replaced with the residual
@@ -409,37 +424,12 @@ static void cleanup_timers(struct list_head *head,
cputime_t utime, cputime_t stime,
unsigned long long sum_exec_runtime)
{
- struct cpu_timer_list *timer, *next;
- cputime_t ptime = utime + stime;
- list_for_each_entry_safe(timer, next, head, entry) {
- list_del_init(&timer->entry);
- if (timer->expires < cputime_to_expires(ptime)) {
- timer->expires = 0;
- } else {
- timer->expires -= cputime_to_expires(ptime);
- }
- }
-
- ++head;
- list_for_each_entry_safe(timer, next, head, entry) {
- list_del_init(&timer->entry);
- if (timer->expires < cputime_to_expires(utime)) {
- timer->expires = 0;
- } else {
- timer->expires -= cputime_to_expires(utime);
- }
- }
+ cputime_t ptime = utime + stime;
- ++head;
- list_for_each_entry_safe(timer, next, head, entry) {
- list_del_init(&timer->entry);
- if (timer->expires < sum_exec_runtime) {
- timer->expires = 0;
- } else {
- timer->expires -= sum_exec_runtime;
- }
- }
+ cleanup_timers_list(head, cputime_to_expires(ptime));
+ cleanup_timers_list(++head, cputime_to_expires(utime));
+ cleanup_timers_list(++head, sum_exec_runtime);
}
/*