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Pul x86/process updates from Ingo Molnar:
"The main change in this cycle was to add the ARCH_[GET|SET]_CPUID
prctl() ABI extension to control the availability of the CPUID
instruction, analogously to the existing PR_GET|SET_TSC ABI that
controls RDTSC.
Motivation: the 'rr' user-space record-and-replay execution debugger
would like to trap and emulate the CPUID instruction - which
instruction is normally unprivileged.
Trapping CPUID is possible on IvyBridge and later Intel CPUs - expose
this hardware capability"
* 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/syscalls/32: Ignore arch_prctl for other architectures
um/arch_prctl: Fix fallout from x86 arch_prctl() rework
x86/arch_prctl: Add ARCH_[GET|SET]_CPUID
x86/cpufeature: Detect CPUID faulting support
x86/syscalls/32: Wire up arch_prctl on x86-32
x86/arch_prctl: Add do_arch_prctl_common()
x86/arch_prctl/64: Rename do_arch_prctl() to do_arch_prctl_64()
x86/arch_prctl/64: Use SYSCALL_DEFINE2 to define sys_arch_prctl()
x86/arch_prctl: Rename 'code' argument to 'option'
x86/msr: Rename MISC_FEATURE_ENABLES to MISC_FEATURES_ENABLES
x86/process: Optimize TIF_NOTSC switch
x86/process: Correct and optimize TIF_BLOCKSTEP switch
x86/process: Optimize TIF checks in __switch_to_xtra()
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