linux-kernel - [PATCH 4/6] mce-inject: allow injecting status=0 to poll handler

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Date:	Mon, 05 Oct 2009 12:07:57 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	Huang Ying <ying.huang@...el.com>
CC:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Andi Kleen <ak@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/6] mce-inject: allow injecting status=0 to poll handler

We can inject void data to exception handler by writing data with
status=0 and flag=MCE_INJ_EXCEPTION.  But without this patch we cannot
do same to poll handler by status=0 and flag=!MCE_INJ_EXCEPTION.

This change will allow us to test behavior of poll handler with no
data.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
---
 arch/x86/kernel/cpu/mcheck/mce-inject.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce-inject.c b/arch/x86/kernel/cpu/mcheck/mce-inject.c
index e9379b6..105e527 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-inject.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c
@@ -87,7 +87,7 @@ static int mce_raise_notify(struct notifier_block *self,
 	cpu_clear(cpu, mce_inject_cpumask);
 	if (m->inject_flags & MCE_INJ_EXCEPTION)
 		raise_exception(m, args->regs);
-	else if (m->status)
+	else
 		raise_poll(m);
 	return NOTIFY_STOP;
 }
@@ -123,13 +123,12 @@ static int raise_local(void)
 			ret = -EINVAL;
 		}
 		printk(KERN_INFO "MCE exception done on CPU %d\n", cpu);
-	} else if (m->status) {
+	} else {
 		printk(KERN_INFO "Starting machine check poll CPU %d\n", cpu);
 		raise_poll(m);
 		mce_notify_irq();
 		printk(KERN_INFO "Machine check poll done on CPU %d\n", cpu);
-	} else
-		m->finished = 0;
+	}
 
 	return ret;
 }
-- 
1.6.4.3


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