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    Subject[PATCH v4 2/2] x86 mce: use new printk recursion disabling interface
    From: ShuoX Liu <shuox.liu@intel.com>

    Disable printk recursion to make sure MCE logs printed out.

    Signed-off-by: Yanmin Zhang <yanmin_zhang@linux.intel.com>
    Signed-off-by: ShuoX Liu <shuox.liu@intel.com>
    ---
    We hit it when running a MTBF testing on a Android atom mobile.
    ---
    arch/x86/kernel/cpu/mcheck/mce.c | 2 ++
    1 files changed, 2 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
    index 2afcbd2..906e838 100644
    --- a/arch/x86/kernel/cpu/mcheck/mce.c
    +++ b/arch/x86/kernel/cpu/mcheck/mce.c
    @@ -306,6 +306,7 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
    {
    int i, apei_err = 0;

    + printk_recursion_check_disable();
    if (!fake_panic) {
    /*
    * Make sure only one CPU runs in machine check panic
    @@ -360,6 +361,7 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
    panic(msg);
    } else
    pr_emerg(HW_ERR "Fake kernel panic: %s\n", msg);
    + printk_recursion_check_enable();
    }

    /* Support code for software error injection */
    --
    1.7.1


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