linux-kernel - [PATCH 1/2] x86, mce: introduce mce_memory_failure

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Message-ID: <4DF6CCB2.6060805@jp.fujitsu.com>
Date:	Tue, 14 Jun 2011 11:51:30 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	Tony Luck <tony.luck@...el.com>
CC:	Avi Kivity <avi@...hat.com>, Borislav Petkov <bp@...64.org>,
	Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Huang, Ying" <ying.huang@...el.com>
Subject: [PATCH 1/2] x86, mce: introduce mce_memory_failure_process

And relocate related functions to near by mce_ring* routines.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c |   26 +++++++++++++++++---------
 1 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 08363b0..26d7994 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -395,6 +395,8 @@ static inline void mce_gather_info(struct mce *m, struct pt_regs *regs)
 }
 
 /*
+ * mce_ring, mce_memory_failure: Support for Memory errors
+ *
  * Simple lockless ring to communicate PFNs from the exception handler with the
  * process context work function. This is vastly simplified because there's
  * only a single reader and a single writer.
@@ -449,6 +451,20 @@ static int mce_ring_add(unsigned long pfn)
 	return 0;
 }
 
+/* dummy to break dependency. actual code is in mm/memory-failure.c */
+void __attribute__((weak)) memory_failure(unsigned long pfn, int vector)
+{
+	pr_err("Action optional memory failure at %lx ignored\n", pfn);
+}
+
+static inline void mce_memory_failure_process(void)
+{
+	unsigned long pfn;
+
+	while (mce_ring_get(&pfn))
+		memory_failure(pfn, MCE_VECTOR);
+}
+
 int mce_available(struct cpuinfo_x86 *c)
 {
 	if (mce_disabled)
@@ -1049,12 +1065,6 @@ out:
 }
 EXPORT_SYMBOL_GPL(do_machine_check);
 
-/* dummy to break dependency. actual code is in mm/memory-failure.c */
-void __attribute__((weak)) memory_failure(unsigned long pfn, int vector)
-{
-	printk(KERN_ERR "Action optional memory failure at %lx ignored\n", pfn);
-}
-
 /*
  * Called after mce notification in process context. This code
  * is allowed to sleep. Call the high level VM handler to process
@@ -1068,10 +1078,8 @@ void __attribute__((weak)) memory_failure(unsigned long pfn, int vector)
  */
 void mce_notify_process(void)
 {
-	unsigned long pfn;
 	mce_notify_irq();
-	while (mce_ring_get(&pfn))
-		memory_failure(pfn, MCE_VECTOR);
+	mce_memory_failure_process();
 }
 
 static void mce_process_work(struct work_struct *dummy)
-- 
1.7.1


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