Merge branches 'core/signal' and 'x86/spinlocks' into x86/xen

arch/ia64/include/asm/siginfo.h

arch/powerpc/include/asm/siginfo.h

arch/x86/ia32/ia32_signal.c

arch/x86/kernel/process_64.c

arch/x86/kernel/ptrace.c

arch/x86/kernel/signal_32.c

arch/x86/kernel/signal_64.c

arch/x86/kernel/traps_32.c

arch/x86/kernel/traps_64.c

arch/x86/kernel/vmlinux_64.lds.S

arch/x86/mm/ioremap.c

include/asm-generic/siginfo.h

include/asm-parisc/siginfo.h

include/asm-x86/ptrace.h

include/asm-x86/spinlock.h

include/asm-x86/traps.h