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Merge branch 'timers-for-linus-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'timers-for-linus-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  hrtimer: Fix /proc/timer_list regression
  itimers: Fix racy writes to cpu_itimer fields
  timekeeping: Fix clock_gettime vsyscall time warp
This commit is contained in:
Linus Torvalds
2009-12-08 19:28:09 -08:00
parent 60d8ce2cd6 8629ea2eab
commit fbf07eac7b
8 changed files with 23 additions and 17 deletions
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7
kernel/itimer.c
View File

@ -146,6 +146,7 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
{
cputime_t cval, nval, cinterval, ninterval;
s64 ns_ninterval, ns_nval;
u32 error, incr_error;
struct cpu_itimer *it = &tsk->signal->it[clock_id];
nval = timeval_to_cputime(&value->it_value);
@ -153,8 +154,8 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
ninterval = timeval_to_cputime(&value->it_interval);
ns_ninterval = timeval_to_ns(&value->it_interval);
it->incr_error = cputime_sub_ns(ninterval, ns_ninterval);
it->error = cputime_sub_ns(nval, ns_nval);
error = cputime_sub_ns(nval, ns_nval);
incr_error = cputime_sub_ns(ninterval, ns_ninterval);
spin_lock_irq(&tsk->sighand->siglock);
@ -168,6 +169,8 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
}
it->expires = nval;
it->incr = ninterval;
it->error = error;
it->incr_error = incr_error;
trace_itimer_state(clock_id == CPUCLOCK_VIRT ?
ITIMER_VIRTUAL : ITIMER_PROF, value, nval);

6
kernel/time/timekeeping.c
View File

@ -170,7 +170,7 @@ void timekeeping_leap_insert(int leapsecond)
{
xtime.tv_sec += leapsecond;
wall_to_monotonic.tv_sec -= leapsecond;
update_vsyscall(&xtime, timekeeper.clock);
update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);
}
#ifdef CONFIG_GENERIC_TIME
@ -328,7 +328,7 @@ int do_settimeofday(struct timespec *tv)
timekeeper.ntp_error = 0;
ntp_clear();
update_vsyscall(&xtime, timekeeper.clock);
update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);
write_sequnlock_irqrestore(&xtime_lock, flags);
@ -840,7 +840,7 @@ void update_wall_time(void)
timekeeper.ntp_error_shift;
/* check to see if there is a new clocksource to use */
update_vsyscall(&xtime, timekeeper.clock);
update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);
}
/**