Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 1be3572..8805025 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -8,16 +8,18 @@
#include <linux/sched/jobctl.h>
#include <linux/sched/task.h>
#include <linux/cred.h>
+#include <linux/refcount.h>
+#include <linux/posix-timers.h>
/*
* Types defining task->signal and task->sighand and APIs using them:
*/
struct sighand_struct {
- atomic_t count;
- struct k_sigaction action[_NSIG];
spinlock_t siglock;
+ refcount_t count;
wait_queue_head_t signalfd_wqh;
+ struct k_sigaction action[_NSIG];
};
/*
@@ -55,18 +57,12 @@
/**
* struct thread_group_cputimer - thread group interval timer counts
* @cputime_atomic: atomic thread group interval timers.
- * @running: true when there are timers running and
- * @cputime_atomic receives updates.
- * @checking_timer: true when a thread in the group is in the
- * process of checking for thread group timers.
*
* This structure contains the version of task_cputime, above, that is
* used for thread group CPU timer calculations.
*/
struct thread_group_cputimer {
struct task_cputime_atomic cputime_atomic;
- bool running;
- bool checking_timer;
};
struct multiprocess_signals {
@@ -82,7 +78,7 @@
* the locking of signal_struct.
*/
struct signal_struct {
- atomic_t sigcnt;
+ refcount_t sigcnt;
atomic_t live;
int nr_threads;
struct list_head thread_head;
@@ -147,12 +143,9 @@
*/
struct thread_group_cputimer cputimer;
- /* Earliest-expiration cache. */
- struct task_cputime cputime_expires;
-
- struct list_head cpu_timers[3];
-
#endif
+ /* Empty if CONFIG_POSIX_TIMERS=n */
+ struct posix_cputimers posix_cputimers;
/* PID/PID hash table linkage. */
struct pid *pids[PIDTYPE_MAX];
@@ -270,17 +263,18 @@
extern void flush_signals(struct task_struct *);
extern void ignore_signals(struct task_struct *);
extern void flush_signal_handlers(struct task_struct *, int force_default);
-extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
+extern int dequeue_signal(struct task_struct *task,
+ sigset_t *mask, kernel_siginfo_t *info);
-static inline int kernel_dequeue_signal(siginfo_t *info)
+static inline int kernel_dequeue_signal(void)
{
- struct task_struct *tsk = current;
- siginfo_t __info;
+ struct task_struct *task = current;
+ kernel_siginfo_t __info;
int ret;
- spin_lock_irq(&tsk->sighand->siglock);
- ret = dequeue_signal(tsk, &tsk->blocked, info ?: &__info);
- spin_unlock_irq(&tsk->sighand->siglock);
+ spin_lock_irq(&task->sighand->siglock);
+ ret = dequeue_signal(task, &task->blocked, &__info);
+ spin_unlock_irq(&task->sighand->siglock);
return ret;
}
@@ -305,16 +299,19 @@
# define ___ARCH_SI_IA64(_a1, _a2, _a3)
#endif
-int force_sig_fault(int sig, int code, void __user *addr
+int force_sig_fault_to_task(int sig, int code, void __user *addr
___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
, struct task_struct *t);
+int force_sig_fault(int sig, int code, void __user *addr
+ ___ARCH_SI_TRAPNO(int trapno)
+ ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr));
int send_sig_fault(int sig, int code, void __user *addr
___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
, struct task_struct *t);
-int force_sig_mceerr(int code, void __user *, short, struct task_struct *);
+int force_sig_mceerr(int code, void __user *, short);
int send_sig_mceerr(int code, void __user *, short, struct task_struct *);
int force_sig_bnderr(void __user *addr, void __user *lower, void __user *upper);
@@ -322,18 +319,18 @@
int force_sig_ptrace_errno_trap(int errno, void __user *addr);
-extern int send_sig_info(int, struct siginfo *, struct task_struct *);
-extern void force_sigsegv(int sig, struct task_struct *p);
-extern int force_sig_info(int, struct siginfo *, struct task_struct *);
-extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
-extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
-extern int kill_pid_info_as_cred(int, struct siginfo *, struct pid *,
+extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *);
+extern void force_sigsegv(int sig);
+extern int force_sig_info(struct kernel_siginfo *);
+extern int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp);
+extern int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid);
+extern int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr, struct pid *,
const struct cred *);
extern int kill_pgrp(struct pid *pid, int sig, int priv);
extern int kill_pid(struct pid *pid, int sig, int priv);
extern __must_check bool do_notify_parent(struct task_struct *, int);
extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);
-extern void force_sig(int, struct task_struct *);
+extern void force_sig(int);
extern int send_sig(int, struct task_struct *, int);
extern int zap_other_threads(struct task_struct *p);
extern struct sigqueue *sigqueue_alloc(void);
@@ -415,12 +412,21 @@
static inline void set_restore_sigmask(void)
{
set_thread_flag(TIF_RESTORE_SIGMASK);
- WARN_ON(!test_thread_flag(TIF_SIGPENDING));
}
+
+static inline void clear_tsk_restore_sigmask(struct task_struct *task)
+{
+ clear_tsk_thread_flag(task, TIF_RESTORE_SIGMASK);
+}
+
static inline void clear_restore_sigmask(void)
{
clear_thread_flag(TIF_RESTORE_SIGMASK);
}
+static inline bool test_tsk_restore_sigmask(struct task_struct *task)
+{
+ return test_tsk_thread_flag(task, TIF_RESTORE_SIGMASK);
+}
static inline bool test_restore_sigmask(void)
{
return test_thread_flag(TIF_RESTORE_SIGMASK);
@@ -436,7 +442,10 @@
static inline void set_restore_sigmask(void)
{
current->restore_sigmask = true;
- WARN_ON(!test_thread_flag(TIF_SIGPENDING));
+}
+static inline void clear_tsk_restore_sigmask(struct task_struct *task)
+{
+ task->restore_sigmask = false;
}
static inline void clear_restore_sigmask(void)
{
@@ -446,6 +455,10 @@
{
return current->restore_sigmask;
}
+static inline bool test_tsk_restore_sigmask(struct task_struct *task)
+{
+ return task->restore_sigmask;
+}
static inline bool test_and_clear_restore_sigmask(void)
{
if (!current->restore_sigmask)
@@ -461,6 +474,16 @@
__set_current_blocked(¤t->saved_sigmask);
}
+extern int set_user_sigmask(const sigset_t __user *umask, size_t sigsetsize);
+
+static inline void restore_saved_sigmask_unless(bool interrupted)
+{
+ if (interrupted)
+ WARN_ON(!test_thread_flag(TIF_SIGPENDING));
+ else
+ restore_saved_sigmask();
+}
+
static inline sigset_t *sigmask_to_save(void)
{
sigset_t *res = ¤t->blocked;
@@ -475,9 +498,8 @@
}
/* These can be the second arg to send_sig_info/send_group_sig_info. */
-#define SEND_SIG_NOINFO ((struct siginfo *) 0)
-#define SEND_SIG_PRIV ((struct siginfo *) 1)
-#define SEND_SIG_FORCED ((struct siginfo *) 2)
+#define SEND_SIG_NOINFO ((struct kernel_siginfo *) 0)
+#define SEND_SIG_PRIV ((struct kernel_siginfo *) 1)
/*
* True if we are on the alternate signal stack.
@@ -599,9 +621,9 @@
return task->signal->pids[PIDTYPE_SID];
}
-static inline int get_nr_threads(struct task_struct *tsk)
+static inline int get_nr_threads(struct task_struct *task)
{
- return tsk->signal->nr_threads;
+ return task->signal->nr_threads;
}
static inline bool thread_group_leader(struct task_struct *p)
@@ -640,35 +662,35 @@
#define delay_group_leader(p) \
(thread_group_leader(p) && !thread_group_empty(p))
-extern struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
+extern struct sighand_struct *__lock_task_sighand(struct task_struct *task,
unsigned long *flags);
-static inline struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
+static inline struct sighand_struct *lock_task_sighand(struct task_struct *task,
unsigned long *flags)
{
struct sighand_struct *ret;
- ret = __lock_task_sighand(tsk, flags);
- (void)__cond_lock(&tsk->sighand->siglock, ret);
+ ret = __lock_task_sighand(task, flags);
+ (void)__cond_lock(&task->sighand->siglock, ret);
return ret;
}
-static inline void unlock_task_sighand(struct task_struct *tsk,
+static inline void unlock_task_sighand(struct task_struct *task,
unsigned long *flags)
{
- spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
+ spin_unlock_irqrestore(&task->sighand->siglock, *flags);
}
-static inline unsigned long task_rlimit(const struct task_struct *tsk,
+static inline unsigned long task_rlimit(const struct task_struct *task,
unsigned int limit)
{
- return READ_ONCE(tsk->signal->rlim[limit].rlim_cur);
+ return READ_ONCE(task->signal->rlim[limit].rlim_cur);
}
-static inline unsigned long task_rlimit_max(const struct task_struct *tsk,
+static inline unsigned long task_rlimit_max(const struct task_struct *task,
unsigned int limit)
{
- return READ_ONCE(tsk->signal->rlim[limit].rlim_max);
+ return READ_ONCE(task->signal->rlim[limit].rlim_max);
}
static inline unsigned long rlimit(unsigned int limit)