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| author | Thomas Gleixner <tglx@linutronix.de> | 2024-11-05 09:14:49 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-11-07 02:14:45 +0100 |
| commit | 69f032c92cf883ea74a4b69ba3d91317aa6f174e (patch) | |
| tree | ec23a73ef67fee11a7f491dcc518a6ed45eb2222 | |
| parent | 647da5f709f112319c0d51e06f330d8afecb1940 (diff) | |
| download | lwn-69f032c92cf883ea74a4b69ba3d91317aa6f174e.tar.gz lwn-69f032c92cf883ea74a4b69ba3d91317aa6f174e.zip | |
signal: Provide ignored_posix_timers list
To prepare for handling posix timer signals on sigaction(SIG_IGN) properly,
add a list to task::signal.
This list will be used to queue posix timers so their signal can be
requeued when SIG_IGN is lifted later.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20241105064213.920101900@linutronix.de
| -rw-r--r-- | include/linux/sched/signal.h | 1 | ||||
| -rw-r--r-- | init/init_task.c | 5 | ||||
| -rw-r--r-- | kernel/fork.c | 1 |
3 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h index 02972fd41931..d5d03d919df8 100644 --- a/include/linux/sched/signal.h +++ b/include/linux/sched/signal.h @@ -138,6 +138,7 @@ struct signal_struct { /* POSIX.1b Interval Timers */ unsigned int next_posix_timer_id; struct hlist_head posix_timers; + struct hlist_head ignored_posix_timers; /* ITIMER_REAL timer for the process */ struct hrtimer real_timer; diff --git a/init/init_task.c b/init/init_task.c index 136a8231355a..e557f622bd90 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -30,8 +30,9 @@ static struct signal_struct init_signals = { .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock), #ifdef CONFIG_POSIX_TIMERS - .posix_timers = HLIST_HEAD_INIT, - .cputimer = { + .posix_timers = HLIST_HEAD_INIT, + .ignored_posix_timers = HLIST_HEAD_INIT, + .cputimer = { .cputime_atomic = INIT_CPUTIME_ATOMIC, }, #endif diff --git a/kernel/fork.c b/kernel/fork.c index 60c0b4868fd4..c2bd8367a850 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1864,6 +1864,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) #ifdef CONFIG_POSIX_TIMERS INIT_HLIST_HEAD(&sig->posix_timers); + INIT_HLIST_HEAD(&sig->ignored_posix_timers); hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); sig->real_timer.function = it_real_fn; #endif |