---

yaml
---
r: 360136
b: refs/heads/master
c: 55bb948
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5c39c0ab5e862cf71cda1fc39a5cedd4e2f18c6e
+refs/heads/master: 55bb9480f9159b229ac3c3454c97b62d1e0a7e80

trunk/arch/arc/include/asm/ptrace.h

@@ -100,6 +100,9 @@ struct callee_regs {
 #define in_syscall(regs)    (regs->event & orig_r8_IS_SCALL)
 #define in_brkpt_trap(regs) (regs->event & orig_r8_IS_BRKPT)
 
+#define syscall_wont_restart(regs) (regs->event |= orig_r8_IS_SCALL_RESTARTED)
+#define syscall_restartable(regs) !(regs->event &  orig_r8_IS_SCALL_RESTARTED)
+
 #define current_pt_regs()					\
 ({								\
 	/* open-coded current_thread_info() */			\

trunk/arch/arc/kernel/signal.c

@@ -128,6 +128,9 @@ SYSCALL_DEFINE0(rt_sigreturn)
 		if (restore_altstack(&sf->uc.uc_stack))
 			goto badframe;
 
+	/* Don't restart from sigreturn */
+	syscall_wont_restart(regs);
+
 	return regs->r0;
 
 badframe:
@@ -318,13 +321,13 @@ void do_signal(struct pt_regs *regs)
 
 	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
 
-	/* Are we from a system call? */
-	restart_scall = in_syscall(regs);
+	restart_scall = in_syscall(regs) && syscall_restartable(regs);
 
 	if (signr > 0) {
-		if (restart_scall)
+		if (restart_scall) {
 			arc_restart_syscall(&ka, regs);
-
+			syscall_wont_restart(regs);	/* No more restarts */
+		}
 		handle_signal(signr, &ka, &info, regs);
 		return;
 	}
@@ -339,6 +342,7 @@ void do_signal(struct pt_regs *regs)
 			regs->r8 = __NR_restart_syscall;
 			regs->ret -= 4;
 		}
+		syscall_wont_restart(regs);	/* No more restarts */
 	}
 
 	/* If there's no signal to deliver, restore the saved sigmask back */