summaryrefslogtreecommitdiff
path: root/include/linux/sched
diff options
context:
space:
mode:
authorEric W. Biederman <ebiederm@xmission.com>2022-02-09 11:46:54 -0600
committerEric W. Biederman <ebiederm@xmission.com>2022-03-10 16:51:50 -0600
commit593febb143d17aa2096cd123c9d62b6981eb1d97 (patch)
tree09a54b26df167cb4d50a8c30d84dd1b8662959f5 /include/linux/sched
parent7c5d8fa6fbb12a3f0eefe8762bfede508e147cb3 (diff)
signal: Move set_notify_signal and clear_notify_signal into sched/signal.h
The header tracehook.h is no place for code to live. The functions set_notify_signal and clear_notify_signal are not about signals. They are about interruptions that act like signals. The fundamental signal primitives wind up calling set_notify_signal and clear_notify_signal. Which means they need to be maintained with the signal code. Since set_notify_signal and clear_notify_signal must be maintained with the signal subsystem move them into sched/signal.h and claim them as part of the signal subsystem. Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lkml.kernel.org/r/20220309162454.123006-10-ebiederm@xmission.com Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'include/linux/sched')
-rw-r--r--include/linux/sched/signal.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index b6ecb9fc4cd2..3c8b34876744 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -349,6 +349,23 @@ extern void sigqueue_free(struct sigqueue *);
extern int send_sigqueue(struct sigqueue *, struct pid *, enum pid_type);
extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
+static inline void clear_notify_signal(void)
+{
+ clear_thread_flag(TIF_NOTIFY_SIGNAL);
+ smp_mb__after_atomic();
+}
+
+/*
+ * Called to break out of interruptible wait loops, and enter the
+ * exit_to_user_mode_loop().
+ */
+static inline void set_notify_signal(struct task_struct *task)
+{
+ if (!test_and_set_tsk_thread_flag(task, TIF_NOTIFY_SIGNAL) &&
+ !wake_up_state(task, TASK_INTERRUPTIBLE))
+ kick_process(task);
+}
+
static inline int restart_syscall(void)
{
set_tsk_thread_flag(current, TIF_SIGPENDING);