GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-04 13:21:45 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

posix_cpu_timer: consolidate expiry time type

Browse source 
The posix cpu timer expiry time is stored in a union of two types: a 64
bits field if we rely on scheduler precise accounting, or a cputime_t if
we rely on jiffies.

This results in quite some duplicate code and special cases to handle the
two types.

Just unify this into a single 64 bits field.  cputime_t can always fit
into it.

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>
This commit is contained in:
Frederic Weisbecker 2013-06-28 00:06:42 +00:00
parent 8bb495e3f0
commit 55ccb616a6
2 changed files with 117 additions and 165 deletions
Download patch file Download diff file Expand all files Collapse all files

16
include/linux/posix-timers.h
View file

@ -7,14 +7,20 @@
#include <linux/timex.h>
#include <linux/alarmtimer.h>
union cpu_time_count {
cputime_t cpu;
unsigned long long sched;
};
static inline unsigned long long cputime_to_expires(cputime_t expires)
{
return (__force unsigned long long)expires;
}
static inline cputime_t expires_to_cputime(unsigned long long expires)
{
return (__force cputime_t)expires;
}
struct cpu_timer_list {
struct list_head entry;
union cpu_time_count expires, incr;
unsigned long long expires, incr;
struct task_struct *task;
int firing;
};