linux-kernel - [RFC 7/9] MCE: Pass registers to work handlers

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Date:	Mon, 23 May 2011 15:14:38 -0700
From:	"Luck, Tony" <tony.luck@...el.com>
To:	linux-kernel@...r.kernel.org
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Huang, Ying" <ying.huang@...el.com>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Borislav Petkov" <bp@...en8.de>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: [RFC 7/9] MCE: Pass registers to work handlers

From: Andi Kleen <andi@...stfloor.org>

Pass the register context to the task work handler.
Needed for the next patch

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 arch/x86/include/asm/mce.h       |    3 ++-
 arch/x86/kernel/cpu/mcheck/mce.c |    4 ++--
 arch/x86/kernel/signal.c         |    2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index eb16e94..66c41e0 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -195,7 +195,8 @@ enum mcp_flags {
 void machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
 
 int mce_notify_irq(void);
-void mce_notify_process(void);
+struct pt_regs;
+void mce_notify_process(struct pt_regs *regs);
 
 DECLARE_PER_CPU(struct mce, injectm);
 extern struct file_operations mce_chrdev_ops;
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index a9a0e25..6b2fa20 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1123,7 +1123,7 @@ void __attribute__((weak)) memory_failure(unsigned long pfn, int vector)
  * This is merely a fast path to expedite processing in some common
  * cases.
  */
-void mce_notify_process(void)
+void mce_notify_process(struct pt_regs *regs)
 {
 	unsigned long pfn;
 	mce_notify_irq();
@@ -1133,7 +1133,7 @@ void mce_notify_process(void)
 
 static void mce_process_work(struct work_struct *dummy)
 {
-	mce_notify_process();
+	mce_notify_process(NULL);
 }
 
 #ifdef CONFIG_X86_MCE_INTEL
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 4fd173c..3e6d421 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -841,7 +841,7 @@ do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
 #ifdef CONFIG_X86_MCE
 	/* notify userspace of pending MCEs */
 	if (thread_info_flags & _TIF_MCE_NOTIFY)
-		mce_notify_process();
+		mce_notify_process(regs);
 #endif /* CONFIG_X86_64 && CONFIG_X86_MCE */
 
 	/* deal with pending signal delivery */
-- 
1.7.3.1

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