+2018-04-03 Adhemerval Zanella <adhemerval.zanella@linaro.org>
+
+ [BZ #22391]
+ * nptl/sigaction.c (__sigaction): Use __is_internal_signal to
+ check for internal nptl signals.
+ * nptl/sigaction.c (__sigaction): Likewise.
+ * signal/sigaddset.c (sigaddset): Likewise.
+ * signal/sigdelset.c (sigdelset): Likewise.
+ * sysdeps/posix/signal.c (__bsd_signal): Likewise.
+ * sysdeps/posix/sigset.c (sigset): Call and check sigaddset return
+ value.
+ * signal/sigfillset.c (sigfillset): User __clear_internal_signals
+ to filter out internal nptl signals.
+ * signal/tst-sigset.c (do_test): Check ech signal indidually and
+ also check realtime signals using standard macros.
+ * sysdeps/generic/internal-signals.h (__clear_internal_signals,
+ __is_internal_signal, __libc_signal_block_all,
+ __libc_signal_block_app, __libc_signal_restore_set): New functions.
+ * sysdeps/nptl/sigfillset.c: Remove file.
+ * sysdeps/unix/sysv/linux/internal-signals.h (__is_internal_signal):
+ Change return to bool.
+ (__clear_internal_signals): Remove SIGTIMER clean since it is
+ equal to SIGCANEL on Linux.
+ * sysdeps/unix/sysv/linux/sigtimedwait.c (__sigtimedwait): Assume
+ signal set was constructed using standard functions.
+