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Groups > linux.kernel > #1276115 > unrolled thread

[PATCH 0/4] RAS stuff for tip:x86/ras

Started byBorislav Petkov <bp@alien8.de>
First post2015-11-24 08:50 +0100
Last post2015-11-24 10:40 +0100
Articles 7 — 3 participants

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Contents

  [PATCH 0/4] RAS stuff for tip:x86/ras Borislav Petkov <bp@alien8.de> - 2015-11-24 08:50 +0100
    [PATCH 1/4] x86/mce: Do not enter deferred errors into the generic pool twice Borislav Petkov <bp@alien8.de> - 2015-11-24 08:50 +0100
      [tip:ras/core] x86/mce:   Do not enter deferred errors into the generic pool twice tip-bot for Tony Luck <tipbot@zytor.com> - 2015-11-24 10:40 +0100
    [PATCH 3/4] x86/mce: Add the missing memory error check on AMD Borislav Petkov <bp@alien8.de> - 2015-11-24 08:50 +0100
      [tip:ras/core] x86/mce: Add the missing memory error check on AMD tip-bot for Borislav Petkov <tipbot@zytor.com> - 2015-11-24 11:00 +0100
    [PATCH 2/4] x86/RAS: Remove mce.usable_addr Borislav Petkov <bp@alien8.de> - 2015-11-24 08:50 +0100
      [tip:ras/core] x86/RAS: Remove mce.usable_addr tip-bot for Borislav Petkov <tipbot@zytor.com> - 2015-11-24 10:40 +0100

#1276115 — [PATCH 0/4] RAS stuff for tip:x86/ras

FromBorislav Petkov <bp@alien8.de>
Date2015-11-24 08:50 +0100
Subject[PATCH 0/4] RAS stuff for tip:x86/ras
Message-ID<qygwq-58x-5@gated-at.bofh.it>
From: Borislav Petkov <bp@suse.de>

Hi Ingo,

here a couple of small fixes for x86/ras for 4.5.

Please apply,
thanks.

Borislav Petkov (3):
  x86/RAS: Remove mce.usable_addr
  x86/mce: Add the missing memory error check on AMD
  x86/mce: Make usable address checks Intel-only

Tony Luck (1):
  x86/mce: Do not enter deferred errors into the generic pool twice

 arch/x86/include/uapi/asm/mce.h  |  2 +-
 arch/x86/kernel/cpu/mcheck/mce.c | 82 ++++++++++++++++++++--------------------
 2 files changed, 43 insertions(+), 41 deletions(-)

-- 
2.3.5

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#1276118 — [PATCH 1/4] x86/mce: Do not enter deferred errors into the generic pool twice

FromBorislav Petkov <bp@alien8.de>
Date2015-11-24 08:50 +0100
Subject[PATCH 1/4] x86/mce: Do not enter deferred errors into the generic pool twice
Message-ID<qygwq-58x-11@gated-at.bofh.it>
In reply to#1276115
From: Tony Luck <tony.luck@intel.com>

We used to have a special ring buffer for deferred errors that was used
to mark problem pages. We replaced that with a generic pool. Then later
converted mce_log() to also use the same pool. As a result, we end up
adding all deferred errors to the pool twice.

Rearrange this code. Make sure to set the m.severity and m.usable_addr
fields for deferred errors. Then if flags and mca_cfg.dont_log_ce mean
we call mce_log() we are done, because that will add this entry to the
generic pool.

If we skipped mce_log(), then we still want to take action for the
deferred error, so add to the pool.

Change the name of the boolean "error_logged" to "error_seen", we should
set it whether of not we logged an error because the return value from
machine_check_poll() is used to decide whether storms have subsided or
not.

Reported-by: Gong Chen <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/3165a4989dcb45fc0306438d40d0cf2ace429c4c.1447280215.git.tony.luck@intel.com
Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index c5b0d562dbf5..6531cb46803c 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -567,7 +567,7 @@ DEFINE_PER_CPU(unsigned, mce_poll_count);
  */
 bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 {
-	bool error_logged = false;
+	bool error_seen = false;
 	struct mce m;
 	int severity;
 	int i;
@@ -601,6 +601,8 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		    (m.status & (mca_cfg.ser ? MCI_STATUS_S : MCI_STATUS_UC)))
 			continue;
 
+		error_seen = true;
+
 		mce_read_aux(&m, i);
 
 		if (!(flags & MCP_TIMESTAMP))
@@ -608,17 +610,10 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 
 		severity = mce_severity(&m, mca_cfg.tolerant, NULL, false);
 
-		/*
-		 * In the cases where we don't have a valid address after all,
-		 * do not add it into the ring buffer.
-		 */
 		if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m)) {
 			if (m.status & MCI_STATUS_ADDRV) {
 				m.severity = severity;
 				m.usable_addr = mce_usable_address(&m);
-
-				if (!mce_gen_pool_add(&m))
-					mce_schedule_work();
 			}
 		}
 
@@ -626,9 +621,16 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		 * Don't get the IP here because it's unlikely to
 		 * have anything to do with the actual error location.
 		 */
-		if (!(flags & MCP_DONTLOG) && !mca_cfg.dont_log_ce) {
-			error_logged = true;
+		if (!(flags & MCP_DONTLOG) && !mca_cfg.dont_log_ce)
 			mce_log(&m);
+		else if (m.usable_addr) {
+			/*
+			 * Although we skipped logging this, we still want
+			 * to take action. Add to the pool so the registered
+			 * notifiers will see it.
+			 */
+			if (!mce_gen_pool_add(&m))
+				mce_schedule_work();
 		}
 
 		/*
@@ -644,7 +646,7 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 
 	sync_core();
 
-	return error_logged;
+	return error_seen;
 }
 EXPORT_SYMBOL_GPL(machine_check_poll);
 
-- 
2.3.5

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#1276201 — [tip:ras/core] x86/mce: Do not enter deferred errors into the generic pool twice

Fromtip-bot for Tony Luck <tipbot@zytor.com>
Date2015-11-24 10:40 +0100
Subject[tip:ras/core] x86/mce: Do not enter deferred errors into the generic pool twice
Message-ID<qyieT-6jd-33@gated-at.bofh.it>
In reply to#1276118
Commit-ID:  8b38937b7ab55e93065a14c88753b1fe83e93c60
Gitweb:     http://git.kernel.org/tip/8b38937b7ab55e93065a14c88753b1fe83e93c60
Author:     Tony Luck <tony.luck@intel.com>
AuthorDate: Tue, 24 Nov 2015 08:41:17 +0100
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 24 Nov 2015 09:12:35 +0100

x86/mce: Do not enter deferred errors into the generic pool twice

We used to have a special ring buffer for deferred errors that
was used to mark problem pages. We replaced that with a generic
pool. Then later converted mce_log() to also use the same pool.
As a result, we end up adding all deferred errors to the pool
twice.

Rearrange this code. Make sure to set the m.severity and
m.usable_addr fields for deferred errors. Then if flags and
mca_cfg.dont_log_ce mean we call mce_log() we are done, because
that will add this entry to the generic pool.

If we skipped mce_log(), then we still want to take action for
the deferred error, so add to the pool.

Change the name of the boolean "error_logged" to "error_seen",
we should set it whether of not we logged an error because the
return value from machine_check_poll() is used to decide whether
storms have subsided or not.

Reported-by: Gong Chen <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1448350880-5573-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index c5b0d56..6531cb4 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -567,7 +567,7 @@ DEFINE_PER_CPU(unsigned, mce_poll_count);
  */
 bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 {
-	bool error_logged = false;
+	bool error_seen = false;
 	struct mce m;
 	int severity;
 	int i;
@@ -601,6 +601,8 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		    (m.status & (mca_cfg.ser ? MCI_STATUS_S : MCI_STATUS_UC)))
 			continue;
 
+		error_seen = true;
+
 		mce_read_aux(&m, i);
 
 		if (!(flags & MCP_TIMESTAMP))
@@ -608,17 +610,10 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 
 		severity = mce_severity(&m, mca_cfg.tolerant, NULL, false);
 
-		/*
-		 * In the cases where we don't have a valid address after all,
-		 * do not add it into the ring buffer.
-		 */
 		if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m)) {
 			if (m.status & MCI_STATUS_ADDRV) {
 				m.severity = severity;
 				m.usable_addr = mce_usable_address(&m);
-
-				if (!mce_gen_pool_add(&m))
-					mce_schedule_work();
 			}
 		}
 
@@ -626,9 +621,16 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		 * Don't get the IP here because it's unlikely to
 		 * have anything to do with the actual error location.
 		 */
-		if (!(flags & MCP_DONTLOG) && !mca_cfg.dont_log_ce) {
-			error_logged = true;
+		if (!(flags & MCP_DONTLOG) && !mca_cfg.dont_log_ce)
 			mce_log(&m);
+		else if (m.usable_addr) {
+			/*
+			 * Although we skipped logging this, we still want
+			 * to take action. Add to the pool so the registered
+			 * notifiers will see it.
+			 */
+			if (!mce_gen_pool_add(&m))
+				mce_schedule_work();
 		}
 
 		/*
@@ -644,7 +646,7 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 
 	sync_core();
 
-	return error_logged;
+	return error_seen;
 }
 EXPORT_SYMBOL_GPL(machine_check_poll);
 
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#1276119 — [PATCH 3/4] x86/mce: Add the missing memory error check on AMD

FromBorislav Petkov <bp@alien8.de>
Date2015-11-24 08:50 +0100
Subject[PATCH 3/4] x86/mce: Add the missing memory error check on AMD
Message-ID<qygwq-58x-19@gated-at.bofh.it>
In reply to#1276115
From: Borislav Petkov <bp@suse.de>

We simply need to look at the extended error code when detecting whether
the error is of type memory.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index fb8b1db7b150..e00e85ab7387 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -522,10 +522,10 @@ static bool memory_error(struct mce *m)
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 
 	if (c->x86_vendor == X86_VENDOR_AMD) {
-		/*
-		 * coming soon
-		 */
-		return false;
+		/* ErrCodeExt[20:16] */
+		u8 xec = (m->status >> 16) & 0x1f;
+
+		return (xec == 0x0 || xec == 0x8);
 	} else if (c->x86_vendor == X86_VENDOR_INTEL) {
 		/*
 		 * Intel SDM Volume 3B - 15.9.2 Compound Error Codes
-- 
2.3.5

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#1276257 — [tip:ras/core] x86/mce: Add the missing memory error check on AMD

Fromtip-bot for Borislav Petkov <tipbot@zytor.com>
Date2015-11-24 11:00 +0100
Subject[tip:ras/core] x86/mce: Add the missing memory error check on AMD
Message-ID<qyiyf-6qf-41@gated-at.bofh.it>
In reply to#1276119
Commit-ID:  db548a28fcee0f38cf4c7c726becf24c8afacf02
Gitweb:     http://git.kernel.org/tip/db548a28fcee0f38cf4c7c726becf24c8afacf02
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 24 Nov 2015 08:41:19 +0100
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 24 Nov 2015 09:12:35 +0100

x86/mce: Add the missing memory error check on AMD

We simply need to look at the extended error code when detecting
whether the error is of type memory.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1448350880-5573-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index fb8b1db..e00e85a 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -522,10 +522,10 @@ static bool memory_error(struct mce *m)
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 
 	if (c->x86_vendor == X86_VENDOR_AMD) {
-		/*
-		 * coming soon
-		 */
-		return false;
+		/* ErrCodeExt[20:16] */
+		u8 xec = (m->status >> 16) & 0x1f;
+
+		return (xec == 0x0 || xec == 0x8);
 	} else if (c->x86_vendor == X86_VENDOR_INTEL) {
 		/*
 		 * Intel SDM Volume 3B - 15.9.2 Compound Error Codes
--
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#1276120 — [PATCH 2/4] x86/RAS: Remove mce.usable_addr

FromBorislav Petkov <bp@alien8.de>
Date2015-11-24 08:50 +0100
Subject[PATCH 2/4] x86/RAS: Remove mce.usable_addr
Message-ID<qygwq-58x-21@gated-at.bofh.it>
In reply to#1276115
From: Borislav Petkov <bp@suse.de>

It is useless and we can use the function instead. Besides, mcelog(8)
hasn't managed to make use of it yet. So kill it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
---
 arch/x86/include/uapi/asm/mce.h  |  2 +-
 arch/x86/kernel/cpu/mcheck/mce.c | 12 ++++--------
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/uapi/asm/mce.h b/arch/x86/include/uapi/asm/mce.h
index 03429da2fa80..2184943341bf 100644
--- a/arch/x86/include/uapi/asm/mce.h
+++ b/arch/x86/include/uapi/asm/mce.h
@@ -16,7 +16,7 @@ struct mce {
 	__u8  cpuvendor;	/* cpu vendor as encoded in system.h */
 	__u8  inject_flags;	/* software inject flags */
 	__u8  severity;
-	__u8  usable_addr;
+	__u8  pad;
 	__u32 cpuid;	/* CPUID 1 EAX */
 	__u8  cs;		/* code segment */
 	__u8  bank;	/* machine check bank */
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 6531cb46803c..fb8b1db7b150 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -484,7 +484,7 @@ static int srao_decode_notifier(struct notifier_block *nb, unsigned long val,
 	if (!mce)
 		return NOTIFY_DONE;
 
-	if (mce->usable_addr && (mce->severity == MCE_AO_SEVERITY)) {
+	if (mce_usable_address(mce) && (mce->severity == MCE_AO_SEVERITY)) {
 		pfn = mce->addr >> PAGE_SHIFT;
 		memory_failure(pfn, MCE_VECTOR, 0);
 	}
@@ -610,12 +610,9 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 
 		severity = mce_severity(&m, mca_cfg.tolerant, NULL, false);
 
-		if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m)) {
-			if (m.status & MCI_STATUS_ADDRV) {
+		if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m))
+			if (m.status & MCI_STATUS_ADDRV)
 				m.severity = severity;
-				m.usable_addr = mce_usable_address(&m);
-			}
-		}
 
 		/*
 		 * Don't get the IP here because it's unlikely to
@@ -623,7 +620,7 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		 */
 		if (!(flags & MCP_DONTLOG) && !mca_cfg.dont_log_ce)
 			mce_log(&m);
-		else if (m.usable_addr) {
+		else if (mce_usable_address(&m)) {
 			/*
 			 * Although we skipped logging this, we still want
 			 * to take action. Add to the pool so the registered
@@ -1091,7 +1088,6 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 
 		/* assuming valid severity level != 0 */
 		m.severity = severity;
-		m.usable_addr = mce_usable_address(&m);
 
 		mce_log(&m);
 
-- 
2.3.5

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#1276205 — [tip:ras/core] x86/RAS: Remove mce.usable_addr

Fromtip-bot for Borislav Petkov <tipbot@zytor.com>
Date2015-11-24 10:40 +0100
Subject[tip:ras/core] x86/RAS: Remove mce.usable_addr
Message-ID<qyieT-6jd-39@gated-at.bofh.it>
In reply to#1276120
Commit-ID:  c0ec382e1928402031e754ad0391ecbdabb18c43
Gitweb:     http://git.kernel.org/tip/c0ec382e1928402031e754ad0391ecbdabb18c43
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 24 Nov 2015 08:41:18 +0100
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 24 Nov 2015 09:12:35 +0100

x86/RAS: Remove mce.usable_addr

It is useless and we can use the function instead. Besides,
mcelog(8) hasn't managed to make use of it yet. So kill it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1448350880-5573-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/include/uapi/asm/mce.h  |  2 +-
 arch/x86/kernel/cpu/mcheck/mce.c | 12 ++++--------
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/uapi/asm/mce.h b/arch/x86/include/uapi/asm/mce.h
index 03429da..2184943 100644
--- a/arch/x86/include/uapi/asm/mce.h
+++ b/arch/x86/include/uapi/asm/mce.h
@@ -16,7 +16,7 @@ struct mce {
 	__u8  cpuvendor;	/* cpu vendor as encoded in system.h */
 	__u8  inject_flags;	/* software inject flags */
 	__u8  severity;
-	__u8  usable_addr;
+	__u8  pad;
 	__u32 cpuid;	/* CPUID 1 EAX */
 	__u8  cs;		/* code segment */
 	__u8  bank;	/* machine check bank */
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 6531cb4..fb8b1db 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -484,7 +484,7 @@ static int srao_decode_notifier(struct notifier_block *nb, unsigned long val,
 	if (!mce)
 		return NOTIFY_DONE;
 
-	if (mce->usable_addr && (mce->severity == MCE_AO_SEVERITY)) {
+	if (mce_usable_address(mce) && (mce->severity == MCE_AO_SEVERITY)) {
 		pfn = mce->addr >> PAGE_SHIFT;
 		memory_failure(pfn, MCE_VECTOR, 0);
 	}
@@ -610,12 +610,9 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 
 		severity = mce_severity(&m, mca_cfg.tolerant, NULL, false);
 
-		if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m)) {
-			if (m.status & MCI_STATUS_ADDRV) {
+		if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m))
+			if (m.status & MCI_STATUS_ADDRV)
 				m.severity = severity;
-				m.usable_addr = mce_usable_address(&m);
-			}
-		}
 
 		/*
 		 * Don't get the IP here because it's unlikely to
@@ -623,7 +620,7 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		 */
 		if (!(flags & MCP_DONTLOG) && !mca_cfg.dont_log_ce)
 			mce_log(&m);
-		else if (m.usable_addr) {
+		else if (mce_usable_address(&m)) {
 			/*
 			 * Although we skipped logging this, we still want
 			 * to take action. Add to the pool so the registered
@@ -1091,7 +1088,6 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 
 		/* assuming valid severity level != 0 */
 		m.severity = severity;
-		m.usable_addr = mce_usable_address(&m);
 
 		mce_log(&m);
 
--
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