From: Tony Luck <tony.luck@intel.com>
Date: Wed, 11 Jul 2012 17:20:47 +0000 (-0700)
Subject: x86/mce: Fix siginfo_t->si_addr value for non-recoverable memory faults
X-Git-Tag: v3.6-rc1~154^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6751ed65dc6642af64f7b8a440a75563c8aab7ae;p=pandora-kernel.git

x86/mce: Fix siginfo_t->si_addr value for non-recoverable memory faults

In commit dad1743e5993f1 ("x86/mce: Only restart instruction after machine
check recovery if it is safe") we fixed mce_notify_process() to force a
signal to the current process if it was not restartable (RIPV bit not
set in MCG_STATUS). But doing it here means that the process doesn't
get told the virtual address of the fault via siginfo_t->si_addr. This
would prevent application level recovery from the fault.

Make a new MF_MUST_KILL flag bit for memory_failure() et al. to use so
that we will provide the right information with the signal.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: stable@kernel.org    # 3.4+
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