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posix-cpu-timers: Use dedicated helper to access rlimit values 

Use rlimit() and rlimit_max() helper instead of manually writing
whole chain from task to rlimit value

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170705172548.7911-1-k.opasiak@samsung.com
This commit is contained in:
Krzysztof Opasiak 2017-07-05 19:25:48 +02:00 committed by Thomas Gleixner
parent ef954844c7
commit 3cf294962d
1 changed files with 6 additions and 8 deletions
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14
kernel/time/posix-cpu-timers.c
View File

@ -799,7 +799,6 @@ static void check_thread_timers(struct task_struct *tsk,
struct list_head *firing)
{
struct list_head *timers = tsk->cpu_timers;
struct signal_struct *const sig = tsk->signal;
struct task_cputime *tsk_expires = &tsk->cputime_expires;
u64 expires;
unsigned long soft;
@ -823,10 +822,9 @@ static void check_thread_timers(struct task_struct *tsk,
/*
* Check for the special case thread timers.
*/
soft = READ_ONCE(sig->rlim[RLIMIT_RTTIME].rlim_cur);
soft = task_rlimit(tsk, RLIMIT_RTTIME);
if (soft != RLIM_INFINITY) {
unsigned long hard =
READ_ONCE(sig->rlim[RLIMIT_RTTIME].rlim_max);
unsigned long hard = task_rlimit_max(tsk, RLIMIT_RTTIME);
if (hard != RLIM_INFINITY &&
tsk->rt.timeout > DIV_ROUND_UP(hard, USEC_PER_SEC/HZ)) {
@ -847,7 +845,8 @@ static void check_thread_timers(struct task_struct *tsk,
*/
if (soft < hard) {
soft += USEC_PER_SEC;
sig->rlim[RLIMIT_RTTIME].rlim_cur = soft;
tsk->signal->rlim[RLIMIT_RTTIME].rlim_cur =
soft;
}
if (print_fatal_signals) {
pr_info("RT Watchdog Timeout (soft): %s[%d]\n",
@ -938,11 +937,10 @@ static void check_process_timers(struct task_struct *tsk,
SIGPROF);
check_cpu_itimer(tsk, &sig->it[CPUCLOCK_VIRT], &virt_expires, utime,
SIGVTALRM);
soft = READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_cur);
soft = task_rlimit(tsk, RLIMIT_CPU);
if (soft != RLIM_INFINITY) {
unsigned long psecs = div_u64(ptime, NSEC_PER_SEC);
unsigned long hard =
READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_max);
unsigned long hard = task_rlimit_max(tsk, RLIMIT_CPU);
u64 x;
if (psecs >= hard) {
/*