signal: simplify set_user_sigmask/restore_user_sigmask

[platform/kernel/linux-rpi.git] / include / linux / sched / signal.h

diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 38a0f07..efd8ce7 100644 (file)
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -15,10 +15,10 @@
  */
 
 struct sighand_struct {
-       refcount_t              count;
-       struct k_sigaction      action[_NSIG];
        spinlock_t              siglock;
+       refcount_t              count;
        wait_queue_head_t       signalfd_wqh;
+       struct k_sigaction      action[_NSIG];
 };
 
 /*
@@ -307,16 +307,19 @@ static inline void kernel_signal_stop(void)
 # 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);
@@ -325,17 +328,17 @@ int force_sig_pkuerr(void __user *addr, u32 pkey);
 int force_sig_ptrace_errno_trap(int errno, void __user *addr);
 
 extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *);
-extern void force_sigsegv(int sig, struct task_struct *p);
-extern int force_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_info_as_cred(int, struct kernel_siginfo *, struct 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);
@@ -417,7 +420,6 @@ void task_join_group_stop(struct task_struct *task);
 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)
@@ -448,7 +450,6 @@ static inline bool test_and_clear_restore_sigmask(void)
 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)
 {
@@ -481,6 +482,16 @@ static inline void restore_saved_sigmask(void)
                __set_current_blocked(&current->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 = &current->blocked;