new helper: restore_saved_sigmask()

first fruits of ..._restore_sigmask() helpers: now we can take
boilerplate "signal didn't have a handler, clear RESTORE_SIGMASK
and restore the blocked mask from ->saved_mask" into a common
helper.  Open-coded instances switched...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/alpha/kernel/signal.c

@@ -572,9 +572,7 @@ do_signal(struct pt_regs * regs, struct switch_stack * sw,
 	}
 
 	/* If there's no signal to deliver, we just restore the saved mask.  */
-	if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+	restore_saved_sigmask();
-		set_current_blocked(&current->saved_sigmask);
-
 	if (single_stepping)
 		ptrace_set_bpt(current);	/* re-set breakpoint */
 }

arch/arm/kernel/signal.c

@@ -663,11 +663,7 @@ static void do_signal(struct pt_regs *regs, int syscall)
 			set_thread_flag(TIF_SYSCALL_RESTARTSYS);
 	}
 
-	/* If there's no signal to deliver, we just put the saved sigmask
+	restore_saved_sigmask();
-	 * back.
-	 */
-	if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
-		set_current_blocked(&current->saved_sigmask);
 }
 
 asmlinkage void

arch/avr32/kernel/signal.c

@@ -297,10 +297,7 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int syscall)
 
 	if (signr == 0) {
 		/* No signal to deliver -- put the saved sigmask back */
-		if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+		restore_saved_sigmask();
-			clear_thread_flag(TIF_RESTORE_SIGMASK);
-			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-		}
 		return 0;
 	}
 

arch/blackfin/kernel/signal.c

@@ -319,10 +319,7 @@ asmlinkage void do_signal(struct pt_regs *regs)
 
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 /*

arch/c6x/kernel/signal.c

@@ -343,10 +343,7 @@ static void do_signal(struct pt_regs *regs, int syscall)
 
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 /*

arch/cris/arch-v10/kernel/signal.c

@@ -525,8 +525,5 @@ void do_signal(int canrestart, struct pt_regs *regs)
 
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }

arch/cris/arch-v32/kernel/signal.c

@@ -560,10 +560,7 @@ do_signal(int canrestart, struct pt_regs *regs)
 
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 asmlinkage void

arch/frv/kernel/signal.c

@@ -536,11 +536,7 @@ static void do_signal(void)
 
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
-
 } /* end do_signal() */
 
 /*****************************************************************************/

arch/h8300/kernel/signal.c

@@ -501,8 +501,7 @@ statis void do_signal(struct pt_regs *regs)
 	}
 
 	/* If there's no signal to deliver, we just restore the saved mask.  */
-	if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+	restore_saved_sigmask();
-		set_current_blocked(&current->saved_sigmask);
 }
 
 asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)

arch/hexagon/kernel/signal.c

@@ -259,10 +259,7 @@ static void do_signal(struct pt_regs *regs)
 
 no_restart:
 	/* If there's no signal to deliver, put the saved sigmask back */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)

arch/ia64/kernel/signal.c

@@ -538,8 +538,5 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
 
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }

arch/m32r/kernel/signal.c

@@ -360,10 +360,7 @@ static void do_signal(struct pt_regs *regs)
 			prev_insn(regs);
 		}
 	}
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 /*

arch/m68k/kernel/signal.c

@@ -1182,10 +1182,7 @@ static void do_signal(struct pt_regs *regs)
 		handle_restart(regs, NULL, 0);
 
 	/* If there's no signal to deliver, we just restore the saved mask.  */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 void do_notify_resume(struct pt_regs *regs)

arch/microblaze/kernel/signal.c

@@ -381,10 +381,7 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
 	 * If there's no signal to deliver, we just put the saved sigmask
 	 * back.
 	 */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 void do_notify_resume(struct pt_regs *regs, int in_syscall)

arch/mips/kernel/signal.c

@@ -614,10 +614,7 @@ static void do_signal(struct pt_regs *regs)
 	 * If there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 /*

arch/mn10300/kernel/signal.c

@@ -525,10 +525,7 @@ static void do_signal(struct pt_regs *regs)
 
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 /*

arch/openrisc/kernel/signal.c

@@ -339,11 +339,7 @@ void do_signal(struct pt_regs *regs)
 	if (signr <= 0) {
 		/* no signal to deliver so we just put the saved sigmask
 		 * back */
-		if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+		restore_saved_sigmask();
-			clear_thread_flag(TIF_RESTORE_SIGMASK);
-			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-		}
-
 	} else {		/* signr > 0 */
 		sigset_t *oldset;
 

arch/parisc/kernel/signal.c

@@ -621,12 +621,7 @@ do_signal(struct pt_regs *regs, long in_syscall)
 	DBG(1,"do_signal: Exit (not delivered), regs->gr[28] = %ld\n", 
 		regs->gr[28]);
 
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
-
-	return;
 }
 
 void do_notify_resume(struct pt_regs *regs, long in_syscall)

arch/powerpc/kernel/signal.c

@@ -132,12 +132,8 @@ static int do_signal(struct pt_regs *regs)
 	check_syscall_restart(regs, &ka, signr > 0);
 
 	if (signr <= 0) {
-		struct thread_info *ti = current_thread_info();
 		/* No signal to deliver -- put the saved sigmask back */
-		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
+		restore_saved_sigmask();
-			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
-			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-		}
 		regs->trap = 0;
 		return 0;               /* no signals delivered */
 	}

arch/s390/kernel/signal.c

@@ -484,10 +484,7 @@ void do_signal(struct pt_regs *regs)
 	/*
 	 * If there's no signal to deliver, we just put the saved sigmask back.
 	 */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 void do_notify_resume(struct pt_regs *regs)

arch/score/kernel/signal.c

@@ -337,10 +337,7 @@ static void do_signal(struct pt_regs *regs)
 	 * If there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 /*

arch/sh/kernel/signal_32.c

@@ -610,10 +610,7 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
 	 * If there's no signal to deliver, we just put the saved sigmask
 	 * back.
 	 */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 }
 
 asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned int save_r0,

arch/sh/kernel/signal_64.c

@@ -143,12 +143,7 @@ static void do_signal(struct pt_regs *regs)
 	}
 
 	/* No signal to deliver -- put the saved sigmask back */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
-
-	return;
 }
 
 /*

arch/sparc/kernel/signal32.c

@@ -872,10 +872,7 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs)
 	/* If there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		set_current_blocked(&current->saved_sigmask);
-	}
 }
 
 struct sigstack32 {

arch/sparc/kernel/signal_32.c

@@ -576,10 +576,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 	/* if there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	restore_saved_sigmask();
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		set_current_blocked(&current->saved_sigmask);
-	}
 }
 
 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0,

arch/sparc/kernel/signal_64.c

@@ -594,10 +594,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 	/* If there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		set_current_blocked(&current->saved_sigmask);
-	}
 }
 
 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)

arch/tile/kernel/signal.c

@@ -350,10 +350,7 @@ void do_signal(struct pt_regs *regs)
 	}
 
 	/* If there's no signal to deliver, just put the saved sigmask back. */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 
 done:
 	/* Avoid double syscall restart if there are nested signals. */

arch/um/kernel/signal.c

@@ -130,10 +130,8 @@ static int kern_do_signal(struct pt_regs *regs)
 	 * if there's no signal to deliver, we just put the saved sigmask
 	 * back
 	 */
-	if (!handled_sig && test_thread_flag(TIF_RESTORE_SIGMASK)) {
+	if (!handled_sig)
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
+		restore_saved_sigmask();
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
 	return handled_sig;
 }
 

arch/unicore32/kernel/signal.c

@@ -451,8 +451,7 @@ static void do_signal(struct pt_regs *regs, int syscall)
 	/* If there's no signal to deliver, we just put the saved
 	 * sigmask back.
 	 */
-	if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+	restore_saved_sigmask();
-		set_current_blocked(&current->saved_sigmask);
 }
 
 asmlinkage void do_notify_resume(struct pt_regs *regs,

arch/x86/kernel/signal.c

@@ -796,10 +796,7 @@ static void do_signal(struct pt_regs *regs)
 	 * If there's no signal to deliver, we just put the saved sigmask
 	 * back.
 	 */
-	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+	restore_saved_sigmask();
-		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-		set_current_blocked(&current->saved_sigmask);
-	}
 }
 
 /*

arch/xtensa/kernel/signal.c

@@ -532,8 +532,7 @@ static void do_signal(struct pt_regs *regs)
 	}
 
 	/* If there's no signal to deliver, we just restore the saved mask.  */
-	if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+	restore_saved_sigmask();
-		set_current_blocked(&current->saved_sigmask);
 
 	if (current->ptrace & PT_SINGLESTEP)
 		task_pt_regs(current)->icountlevel = 1;

include/linux/sched.h

@@ -2207,6 +2207,12 @@ extern int send_sigqueue(struct sigqueue *,  struct task_struct *, int group);
 extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
 extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
 
+static inline void restore_saved_sigmask(void)
+{
+	if (test_and_clear_restore_sigmask())
+		set_current_blocked(&current->saved_sigmask);
+}
+
 static inline int kill_cad_pid(int sig, int priv)
 {
 	return kill_pid(cad_pid, sig, priv);