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    Subject[tip:x86/extable] x86, doc: Revert "x86: Document rdmsr_safe restrictions"
    Commit-ID:  060feb650010c261fcfbae9de9348b46cedcd3cd
    Gitweb: http://git.kernel.org/tip/060feb650010c261fcfbae9de9348b46cedcd3cd
    Author: H. Peter Anvin <hpa@linux.intel.com>
    AuthorDate: Thu, 19 Apr 2012 17:07:34 -0700
    Committer: H. Peter Anvin <hpa@linux.intel.com>
    CommitDate: Thu, 19 Apr 2012 17:07:34 -0700

    x86, doc: Revert "x86: Document rdmsr_safe restrictions"

    This reverts commit ce37defc0f6673f5ca2c92ed5cfcaf290ae7dd16
    "x86: Document rdmsr_safe restrictions", as these restrictions no longer apply.

    Reported-by: Borislav Petkov <borislav.petkov@amd.com>
    Link: http://lkml.kernel.org/r/20120419171609.GH3221@aftab.osrc.amd.com
    Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
    ---
    arch/x86/include/asm/msr.h | 9 +--------
    1 files changed, 1 insertions(+), 8 deletions(-)

    diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
    index 95203d4..084ef95 100644
    --- a/arch/x86/include/asm/msr.h
    +++ b/arch/x86/include/asm/msr.h
    @@ -169,14 +169,7 @@ static inline int wrmsr_safe(unsigned msr, unsigned low, unsigned high)
    return native_write_msr_safe(msr, low, high);
    }

    -/*
    - * rdmsr with exception handling.
    - *
    - * Please note that the exception handling works only after we've
    - * switched to the "smart" #GP handler in trap_init() which knows about
    - * exception tables - using this macro earlier than that causes machine
    - * hangs on boxes which do not implement the @msr in the first argument.
    - */
    +/* rdmsr with exception handling */
    #define rdmsr_safe(msr, p1, p2) \
    ({ \
    int __err; \

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