pull clearing RESTORE_SIGMASK into block_sigmask()

arch/alpha/kernel/signal.c

arch/arm/kernel/signal.c

arch/avr32/kernel/signal.c

arch/blackfin/kernel/signal.c

arch/c6x/kernel/signal.c

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

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

arch/frv/kernel/signal.c

arch/h8300/kernel/signal.c

arch/hexagon/kernel/signal.c

arch/ia64/kernel/signal.c

arch/m32r/kernel/signal.c

arch/m68k/kernel/signal.c

arch/microblaze/kernel/signal.c

arch/mips/kernel/signal.c

arch/mn10300/kernel/signal.c

arch/openrisc/kernel/signal.c

arch/parisc/kernel/signal.c

arch/powerpc/kernel/signal.c

arch/s390/kernel/compat_signal.c