[tip:ras/core] x86/mce: Add a wrapper around mce_log() for injection

From: tip-bot for Borislav Petkov
Date: Thu Aug 13 2015 - 06:50:40 EST

Commit-ID: a79da38494ec23f1a7d6ee734e07e9575fd18b58
Gitweb: http://git.kernel.org/tip/a79da38494ec23f1a7d6ee734e07e9575fd18b58
Author: Borislav Petkov <bp@xxxxxxx>
AuthorDate: Wed, 12 Aug 2015 18:29:44 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 13 Aug 2015 10:12:53 +0200

x86/mce: Add a wrapper around mce_log() for injection

Will be used by an injector module in a following patch.

Additionally, add a missing module export reported by 0-DAY
kernel test.

Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1439396985-12812-13-git-send-email-bp@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
arch/x86/kernel/cpu/mcheck/mce-internal.h | 2 ++
arch/x86/kernel/cpu/mcheck/mce.c | 8 ++++++++
2 files changed, 10 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce-internal.h b/arch/x86/kernel/cpu/mcheck/mce-internal.h
index ea8b622..547720e 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-internal.h
+++ b/arch/x86/kernel/cpu/mcheck/mce-internal.h
@@ -79,3 +79,5 @@ static inline int apei_clear_mce(u64 record_id)
return -EINVAL;
+void mce_inject_log(struct mce *m);
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index b979711..e4e6646 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -199,6 +199,14 @@ void mce_log(struct mce *mce)
set_bit(0, &mce_need_notify);

+void mce_inject_log(struct mce *m)
+ mutex_lock(&mce_chrdev_read_mutex);
+ mce_log(m);
+ mutex_unlock(&mce_chrdev_read_mutex);
static struct notifier_block mce_srao_nb;

void mce_register_decode_chain(struct notifier_block *nb)
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