X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=include%2Flinux%2Fthread_info.h;h=38a56477f27ada34c3cd6e56c912205b066bc413;hb=f3de272b821accbc8387211977c2de4f38468d05;hp=accd7bad35b09152b8ecf2abcd8ab063c53ae5fb;hpb=92794a5d6359f9e8ed0d43fe0f3c653f748dcc90;p=deliverable%2Flinux.git

diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index accd7bad35b0..38a56477f27a 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -92,6 +92,31 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
 #define set_need_resched()	set_thread_flag(TIF_NEED_RESCHED)
 #define clear_need_resched()	clear_thread_flag(TIF_NEED_RESCHED)
 
-#endif
+#if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
+/*
+ * An arch can define its own version of set_restore_sigmask() to get the
+ * job done however works, with or without TIF_RESTORE_SIGMASK.
+ */
+#define HAVE_SET_RESTORE_SIGMASK	1
+
+/**
+ * set_restore_sigmask() - make sure saved_sigmask processing gets done
+ *
+ * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
+ * will run before returning to user mode, to process the flag.  For
+ * all callers, TIF_SIGPENDING is already set or it's no harm to set
+ * it.  TIF_RESTORE_SIGMASK need not be in the set of bits that the
+ * arch code will notice on return to user mode, in case those bits
+ * are scarce.  We set TIF_SIGPENDING here to ensure that the arch
+ * signal code always gets run when TIF_RESTORE_SIGMASK is set.
+ */
+static inline void set_restore_sigmask(void)
+{
+	set_thread_flag(TIF_RESTORE_SIGMASK);
+	set_thread_flag(TIF_SIGPENDING);
+}
+#endif	/* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */
+
+#endif	/* __KERNEL__ */
 
 #endif /* _LINUX_THREAD_INFO_H */