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    Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a75a3f6f
    Linus Torvalds 提交于
    Pull x86 asm changes from Ingo Molnar:
     "The main change in this cycle is another step in the big x86 system
      call interface rework by Andy Lutomirski, which moves most of the low
      level x86 entry code from assembly to C, for all syscall entries
      except native 64-bit system calls:
    
        arch/x86/entry/entry_32.S        | 182 ++++------
        arch/x86/entry/entry_64_compat.S | 547 ++++++++-----------------------
        194 insertions(+), 535 deletions(-)
    
      ... our hope is that the final remaining step (converting native
      64-bit system calls) will be less painful as all the previous steps,
      given that most of the legacies and quirks are concentrated around
      native 32-bit and compat environments"
    
    * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (47 commits)
      x86/entry/32: Fix FS and GS restore in opportunistic SYSEXIT
      x86/entry/32: Fix entry_INT80_32() to expect interrupts to be on
      um/x86: Fix build after x86 syscall changes
      x86/asm: Remove the xyz_cfi macros from dwarf2.h
      selftests/x86: Style fixes for the 'unwind_vdso' test
      x86/entry/64/compat: Document sysenter_fix_flags's reason for existence
      x86/entry: Split and inline syscall_return_slowpath()
      x86/entry: Split and inline prepare_exit_to_usermode()
      x86/entry: Use pt_regs_to_thread_info() in syscall entry tracing
      x86/entry: Hide two syscall entry assertions behind CONFIG_DEBUG_ENTRY
      x86/entry: Micro-optimize compat fast syscall arg fetch
      x86/entry: Force inlining of 32-bit syscall code
      x86/entry: Make irqs_disabled checks in exit code depend on lockdep
      x86/entry: Remove unnecessary IRQ twiddling in fast 32-bit syscalls
      x86/asm: Remove thread_info.sysenter_return
      x86/entry/32: Re-implement SYSENTER using the new C path
      x86/entry/32: Switch INT80 to the new C syscall path
      x86/entry/32: Open-code return tracking from fork and kthreads
      x86/entry/compat: Implement opportunistic SYSRETL for compat syscalls
      x86/vdso/compat: Wire up SYSENTER and SYSCSALL for compat userspace
      ...
    a75a3f6f
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