Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull x86 asm updates from Ingo Molnar:
 "This is another big update. Main changes are:

   - lots of x86 system call (and other traps/exceptions) entry code
     enhancements.  In particular the complex parts of the 64-bit entry
     code have been migrated to C code as well, and a number of dusty
     corners have been refreshed.  (Andy Lutomirski)

   - vDSO special mapping robustification and general cleanups (Andy
     Lutomirski)

   - cpufeature refactoring, cleanups and speedups (Borislav Petkov)

   - lots of other changes ..."

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
  x86/cpufeature: Enable new AVX-512 features
  x86/entry/traps: Show unhandled signal for i386 in do_trap()
  x86/entry: Call enter_from_user_mode() with IRQs off
  x86/entry/32: Change INT80 to be an interrupt gate
  x86/entry: Improve system call entry comments
  x86/entry: Remove TIF_SINGLESTEP entry work
  x86/entry/32: Add and check a stack canary for the SYSENTER stack
  x86/entry/32: Simplify and fix up the SYSENTER stack #DB/NMI fixup
  x86/entry: Only allocate space for tss_struct::SYSENTER_stack if needed
  x86/entry: Vastly simplify SYSENTER TF (single-step) handling
  x86/entry/traps: Clear DR6 early in do_debug() and improve the comment
  x86/entry/traps: Clear TIF_BLOCKSTEP on all debug exceptions
  x86/entry/32: Restore FLAGS on SYSEXIT
  x86/entry/32: Filter NT and speed up AC filtering in SYSENTER
  x86/entry/compat: In SYSENTER, sink AC clearing below the existing FLAGS test
  selftests/x86: In syscall_nt, test NT|TF as well
  x86/asm-offsets: Remove PARAVIRT_enabled
  x86/entry/32: Introduce and use X86_BUG_ESPFIX instead of paravirt_enabled
  uprobes: __create_xol_area() must nullify xol_mapping.fault
  x86/cpufeature: Create a new synthetic cpu capability for machine check recovery
  ...

diff --cc Documentation/kernel-parameters.txt
Simple merge

diff --cc arch/x86/Kconfig.debug
Simple merge

diff --cc arch/x86/entry/vdso/vdso2c.h
Simple merge

diff --cc arch/x86/include/asm/mce.h
Simple merge

diff --cc arch/x86/include/asm/processor.h
Simple merge

diff --cc arch/x86/kernel/cpu/Makefile
Simple merge

diff --cc arch/x86/kernel/cpu/centaur.c
Simple merge

diff --cc arch/x86/kernel/cpu/common.c
Simple merge

diff --cc arch/x86/kernel/cpu/cyrix.c
Simple merge

diff --cc arch/x86/kernel/cpu/intel.c
Simple merge

diff --cc arch/x86/kernel/cpu/intel_cacheinfo.c
Simple merge

diff --cc arch/x86/kernel/cpu/mcheck/mce.c
Simple merge

diff --cc arch/x86/kernel/cpu/mtrr/main.c
Simple merge

diff --cc arch/x86/kernel/cpu/transmeta.c
Simple merge

diff --cc arch/x86/kernel/e820.c
Simple merge

diff --cc arch/x86/kernel/ftrace.c
Simple merge

diff --cc arch/x86/kernel/process.c
Simple merge

diff --cc arch/x86/kernel/traps.c
index 211c11c7bba4aaacc99f6e36aae379c60d87c3d4,1baf08187ddf057fe8cbb57bb771d163ee565ee9..5c9ca2bb9fe95c249680f69e076a2320e1855aa1
--- 1/arch/x86/kernel/traps.c
--- 2/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@@ -696,10 -738,10 +738,10 @@@ static void math_error(struct pt_regs *
  
        if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, SIGFPE) == NOTIFY_STOP)
                return;
-       conditional_sti(regs);
+       cond_local_irq_enable(regs);
  
        if (!user_mode(regs)) {
 -              if (!fixup_exception(regs)) {
 +              if (!fixup_exception(regs, trapnr)) {
                        task->thread.error_code = error_code;
                        task->thread.trap_nr = trapnr;
                        die(str, regs, error_code);

diff --cc arch/x86/kernel/vmlinux.lds.S
Simple merge

diff --cc arch/x86/lib/memcpy_64.S
Simple merge

diff --cc include/linux/mm.h
Simple merge